/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 0.2.0-7d8eed3 [2020-11-06 21:59:30,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 21:59:30,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 21:59:30,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 21:59:30,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 21:59:30,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 21:59:30,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 21:59:30,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 21:59:30,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 21:59:30,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 21:59:30,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 21:59:30,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 21:59:30,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 21:59:30,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 21:59:30,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 21:59:30,909 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 [2020-11-06 21:59:30,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 21:59:30,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 21:59:30,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 21:59:30,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 21:59:30,969 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 21:59:30,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 21:59:30,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 21:59:30,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 21:59:30,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 21:59:30,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 21:59:30,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 21:59:30,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 21:59:30,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 21:59:30,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 21:59:30,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 21:59:30,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 21:59:30,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 21:59:30,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 21:59:30,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 21:59:30,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 21:59:30,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 21:59:30,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 21:59:30,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 21:59:30,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 21:59:30,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 21:59:30,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 21:59:30,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 21:59:30,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 21:59:30,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 21:59:30,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 21:59:31,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 21:59:31,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 21:59:31,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 21:59:31,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 21:59:31,423 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 21:59:31,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-11-06 21:59:31,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc319a99c/df60625af681438b8f54ca39c13e869f/FLAG3f79a8161 [2020-11-06 21:59:32,119 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 21:59:32,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-11-06 21:59:32,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc319a99c/df60625af681438b8f54ca39c13e869f/FLAG3f79a8161 [2020-11-06 21:59:32,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc319a99c/df60625af681438b8f54ca39c13e869f [2020-11-06 21:59:32,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 21:59:32,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 21:59:32,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 21:59:32,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 21:59:32,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 21:59:32,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d8a0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32, skipping insertion in model container [2020-11-06 21:59:32,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 21:59:32,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 21:59:32,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:59:32,678 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 21:59:32,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 21:59:32,720 INFO L208 MainTranslator]: Completed translation [2020-11-06 21:59:32,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32 WrapperNode [2020-11-06 21:59:32,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 21:59:32,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 21:59:32,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 21:59:32,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 21:59:32,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (1/1) ... [2020-11-06 21:59:32,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 21:59:32,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 21:59:32,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 21:59:32,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 21:59:32,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (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 [2020-11-06 21:59:32,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 21:59:32,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 21:59:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 21:59:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-11-06 21:59:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 21:59:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 21:59:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 21:59:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 21:59:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 21:59:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 21:59:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-11-06 21:59:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 21:59:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 21:59:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 21:59:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 21:59:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 21:59:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 21:59:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 21:59:33,192 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 21:59:33,193 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 21:59:33,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:33 BoogieIcfgContainer [2020-11-06 21:59:33,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 21:59:33,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 21:59:33,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 21:59:33,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 21:59:33,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:59:32" (1/3) ... [2020-11-06 21:59:33,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69058a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:33, skipping insertion in model container [2020-11-06 21:59:33,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:32" (2/3) ... [2020-11-06 21:59:33,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69058a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:33, skipping insertion in model container [2020-11-06 21:59:33,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:33" (3/3) ... [2020-11-06 21:59:33,206 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-11-06 21:59:33,225 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 21:59:33,229 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 21:59:33,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 21:59:33,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 21:59:33,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 21:59:33,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 21:59:33,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 21:59:33,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 21:59:33,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 21:59:33,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 21:59:33,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 21:59:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-06 21:59:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 21:59:33,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:33,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 21:59:33,322 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash 192942640, now seen corresponding path program 1 times [2020-11-06 21:59:33,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:33,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097832549] [2020-11-06 21:59:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 21:59:33,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097832549] [2020-11-06 21:59:33,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 21:59:33,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 21:59:33,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527491807] [2020-11-06 21:59:33,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 21:59:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 21:59:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 21:59:33,755 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2020-11-06 21:59:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:34,311 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-11-06 21:59:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 21:59:34,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-06 21:59:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:34,326 INFO L225 Difference]: With dead ends: 61 [2020-11-06 21:59:34,326 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 21:59:34,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 21:59:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 21:59:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 21:59:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-11-06 21:59:34,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-11-06 21:59:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:34,388 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-11-06 21:59:34,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 21:59:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-11-06 21:59:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 21:59:34,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:34,392 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] [2020-11-06 21:59:34,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 21:59:34,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1691639833, now seen corresponding path program 1 times [2020-11-06 21:59:34,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:34,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284648920] [2020-11-06 21:59:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:34,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:34,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:34,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 21:59:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284648920] [2020-11-06 21:59:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511991274] [2020-11-06 21:59:34,579 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 [2020-11-06 21:59:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 21:59:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 21:59:34,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:34,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 21:59:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536359014] [2020-11-06 21:59:34,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:59:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:59:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:34,795 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2020-11-06 21:59:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:35,177 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2020-11-06 21:59:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 21:59:35,178 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-06 21:59:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:35,180 INFO L225 Difference]: With dead ends: 55 [2020-11-06 21:59:35,181 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 21:59:35,183 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 [2020-11-06 21:59:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 21:59:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 21:59:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 21:59:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2020-11-06 21:59:35,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 24 [2020-11-06 21:59:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:35,199 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2020-11-06 21:59:35,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:59:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2020-11-06 21:59:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 21:59:35,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:35,202 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] [2020-11-06 21:59:35,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 21:59:35,416 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash 936683835, now seen corresponding path program 1 times [2020-11-06 21:59:35,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:35,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074120830] [2020-11-06 21:59:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 21:59:35,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074120830] [2020-11-06 21:59:35,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587099147] [2020-11-06 21:59:35,679 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 [2020-11-06 21:59:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 21:59:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 21:59:35,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:35,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-06 21:59:35,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908425040] [2020-11-06 21:59:35,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:59:35,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:59:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:35,808 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 9 states. [2020-11-06 21:59:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:36,376 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2020-11-06 21:59:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 21:59:36,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-11-06 21:59:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:36,380 INFO L225 Difference]: With dead ends: 80 [2020-11-06 21:59:36,381 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 21:59:36,382 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 [2020-11-06 21:59:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 21:59:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-06 21:59:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 21:59:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 81 transitions. [2020-11-06 21:59:36,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 81 transitions. Word has length 37 [2020-11-06 21:59:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:36,403 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 81 transitions. [2020-11-06 21:59:36,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:59:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 81 transitions. [2020-11-06 21:59:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 21:59:36,406 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:36,407 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] [2020-11-06 21:59:36,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:36,620 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1370575681, now seen corresponding path program 2 times [2020-11-06 21:59:36,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:36,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855056935] [2020-11-06 21:59:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-06 21:59:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855056935] [2020-11-06 21:59:36,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389076150] [2020-11-06 21:59:36,913 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 [2020-11-06 21:59:36,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 21:59:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 21:59:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-06 21:59:37,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:37,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-06 21:59:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415066482] [2020-11-06 21:59:37,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 21:59:37,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:37,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 21:59:37,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 21:59:37,063 INFO L87 Difference]: Start difference. First operand 55 states and 81 transitions. Second operand 9 states. [2020-11-06 21:59:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:37,634 INFO L93 Difference]: Finished difference Result 126 states and 233 transitions. [2020-11-06 21:59:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 21:59:37,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-11-06 21:59:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:37,639 INFO L225 Difference]: With dead ends: 126 [2020-11-06 21:59:37,639 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 21:59:37,645 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 [2020-11-06 21:59:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 21:59:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-06 21:59:37,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-06 21:59:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2020-11-06 21:59:37,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 50 [2020-11-06 21:59:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:37,671 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2020-11-06 21:59:37,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 21:59:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2020-11-06 21:59:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-06 21:59:37,677 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:37,677 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] [2020-11-06 21:59:37,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:37,882 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:37,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:37,883 INFO L82 PathProgramCache]: Analyzing trace with hash -69170412, now seen corresponding path program 3 times [2020-11-06 21:59:37,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:37,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989999687] [2020-11-06 21:59:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-06 21:59:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 148 proven. 218 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-11-06 21:59:38,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989999687] [2020-11-06 21:59:38,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500691781] [2020-11-06 21:59:38,386 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 [2020-11-06 21:59:38,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-06 21:59:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 21:59:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 182 proven. 101 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-11-06 21:59:38,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:38,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2020-11-06 21:59:38,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962691503] [2020-11-06 21:59:38,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-06 21:59:38,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-06 21:59:38,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-11-06 21:59:38,763 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand 20 states. [2020-11-06 21:59:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:41,831 INFO L93 Difference]: Finished difference Result 132 states and 259 transitions. [2020-11-06 21:59:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 21:59:41,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-11-06 21:59:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:41,841 INFO L225 Difference]: With dead ends: 132 [2020-11-06 21:59:41,841 INFO L226 Difference]: Without dead ends: 83 [2020-11-06 21:59:41,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2020-11-06 21:59:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-06 21:59:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-11-06 21:59:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-06 21:59:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2020-11-06 21:59:41,883 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 124 [2020-11-06 21:59:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:41,885 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2020-11-06 21:59:41,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-06 21:59:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2020-11-06 21:59:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 21:59:41,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:41,896 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] [2020-11-06 21:59:42,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:42,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1938812884, now seen corresponding path program 4 times [2020-11-06 21:59:42,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:42,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312671456] [2020-11-06 21:59:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-06 21:59:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 250 proven. 107 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-11-06 21:59:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312671456] [2020-11-06 21:59:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887286640] [2020-11-06 21:59:42,684 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 [2020-11-06 21:59:42,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 21:59:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 21:59:42,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-11-06 21:59:43,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:43,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2020-11-06 21:59:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128215992] [2020-11-06 21:59:43,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 21:59:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 21:59:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-11-06 21:59:43,033 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand 19 states. [2020-11-06 21:59:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:45,483 INFO L93 Difference]: Finished difference Result 201 states and 398 transitions. [2020-11-06 21:59:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-06 21:59:45,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 123 [2020-11-06 21:59:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:45,489 INFO L225 Difference]: With dead ends: 201 [2020-11-06 21:59:45,489 INFO L226 Difference]: Without dead ends: 114 [2020-11-06 21:59:45,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=577, Invalid=2075, Unknown=0, NotChecked=0, Total=2652 [2020-11-06 21:59:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-06 21:59:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2020-11-06 21:59:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-06 21:59:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 157 transitions. [2020-11-06 21:59:45,541 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 157 transitions. Word has length 123 [2020-11-06 21:59:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:45,542 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 157 transitions. [2020-11-06 21:59:45,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 21:59:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 157 transitions. [2020-11-06 21:59:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-11-06 21:59:45,549 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:45,549 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] [2020-11-06 21:59:45,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 21:59:45,763 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash 817501940, now seen corresponding path program 5 times [2020-11-06 21:59:45,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:45,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367111615] [2020-11-06 21:59:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:45,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:45,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-06 21:59:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-11-06 21:59:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367111615] [2020-11-06 21:59:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118997566] [2020-11-06 21:59:46,657 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 [2020-11-06 21:59:46,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-06 21:59:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-06 21:59:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-11-06 21:59:46,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:46,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 25 [2020-11-06 21:59:46,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145496284] [2020-11-06 21:59:46,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 21:59:46,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 21:59:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-11-06 21:59:46,961 INFO L87 Difference]: Start difference. First operand 105 states and 157 transitions. Second operand 25 states. [2020-11-06 21:59:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:49,974 INFO L93 Difference]: Finished difference Result 230 states and 405 transitions. [2020-11-06 21:59:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-06 21:59:49,975 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 162 [2020-11-06 21:59:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:49,980 INFO L225 Difference]: With dead ends: 230 [2020-11-06 21:59:49,980 INFO L226 Difference]: Without dead ends: 138 [2020-11-06 21:59:49,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=671, Invalid=3111, Unknown=0, NotChecked=0, Total=3782 [2020-11-06 21:59:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-06 21:59:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2020-11-06 21:59:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-06 21:59:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 190 transitions. [2020-11-06 21:59:50,016 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 190 transitions. Word has length 162 [2020-11-06 21:59:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:50,017 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 190 transitions. [2020-11-06 21:59:50,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 21:59:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 190 transitions. [2020-11-06 21:59:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-11-06 21:59:50,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:50,021 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] [2020-11-06 21:59:50,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:50,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 282891340, now seen corresponding path program 6 times [2020-11-06 21:59:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:50,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426080849] [2020-11-06 21:59:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-06 21:59:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:50,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-06 21:59:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-06 21:59:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-11-06 21:59:51,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426080849] [2020-11-06 21:59:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785088592] [2020-11-06 21:59:51,162 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 [2020-11-06 21:59:51,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-06 21:59:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 21:59:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-06 21:59:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-11-06 21:59:51,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 27 [2020-11-06 21:59:51,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684115820] [2020-11-06 21:59:51,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 21:59:51,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:51,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 21:59:51,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-11-06 21:59:51,443 INFO L87 Difference]: Start difference. First operand 120 states and 190 transitions. Second operand 27 states. [2020-11-06 21:59:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:54,235 INFO L93 Difference]: Finished difference Result 186 states and 322 transitions. [2020-11-06 21:59:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-06 21:59:54,242 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 188 [2020-11-06 21:59:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:54,246 INFO L225 Difference]: With dead ends: 186 [2020-11-06 21:59:54,247 INFO L226 Difference]: Without dead ends: 181 [2020-11-06 21:59:54,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=686, Invalid=3096, Unknown=0, NotChecked=0, Total=3782 [2020-11-06 21:59:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-11-06 21:59:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2020-11-06 21:59:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-06 21:59:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 247 transitions. [2020-11-06 21:59:54,279 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 247 transitions. Word has length 188 [2020-11-06 21:59:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:54,280 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 247 transitions. [2020-11-06 21:59:54,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 21:59:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 247 transitions. [2020-11-06 21:59:54,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-06 21:59:54,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 21:59:54,283 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] [2020-11-06 21:59:54,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 21:59:54,498 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 21:59:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 21:59:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1916267924, now seen corresponding path program 7 times [2020-11-06 21:59:54,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 21:59:54,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519379384] [2020-11-06 21:59:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 21:59:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 21:59:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 21:59:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 21:59:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:54,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-11-06 21:59:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 21:59:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 21:59:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 21:59:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-11-06 21:59:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-11-06 21:59:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-11-06 21:59:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519379384] [2020-11-06 21:59:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659550548] [2020-11-06 21:59:55,275 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 [2020-11-06 21:59:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 21:59:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-06 21:59:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 21:59:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-11-06 21:59:55,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 21:59:55,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 26 [2020-11-06 21:59:55,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770882161] [2020-11-06 21:59:55,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-06 21:59:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 21:59:55,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-06 21:59:55,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-11-06 21:59:55,544 INFO L87 Difference]: Start difference. First operand 143 states and 247 transitions. Second operand 26 states. [2020-11-06 21:59:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 21:59:58,856 INFO L93 Difference]: Finished difference Result 287 states and 578 transitions. [2020-11-06 21:59:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-06 21:59:58,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2020-11-06 21:59:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 21:59:58,863 INFO L225 Difference]: With dead ends: 287 [2020-11-06 21:59:58,863 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 21:59:58,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2020-11-06 21:59:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 21:59:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 21:59:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 21:59:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 21:59:58,872 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 175 [2020-11-06 21:59:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 21:59:58,872 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 21:59:58,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-06 21:59:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 21:59:58,872 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 21:59:59,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 21:59:59,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 21:59:59,609 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 21:59:59,775 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 88 [2020-11-06 21:59:59,956 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:00,143 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 85 [2020-11-06 22:00:00,298 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 85 [2020-11-06 22:00:00,480 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:00,653 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:01,442 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:01,819 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:01,946 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106 [2020-11-06 22:00:02,556 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 14 [2020-11-06 22:00:04,197 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 130 DAG size of output: 44 [2020-11-06 22:00:04,445 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-11-06 22:00:04,499 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:00:04,499 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:00:04,499 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:00:04,499 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:00:04,499 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:00:04,500 INFO L262 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|)) [2020-11-06 22:00:04,500 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:00:04,500 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:00:04,500 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:00:04,500 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:00:04,500 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:00:04,500 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 27 47) the Hoare annotation is: true [2020-11-06 22:00:04,500 INFO L266 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 27 47) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L262 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: false [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 27 47) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point L45-1(line 45) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L269 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: true [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-06 22:00:04,501 INFO L266 CegarLoopResult]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-11-06 22:00:04,502 INFO L266 CegarLoopResult]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-11-06 22:00:04,502 INFO L262 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|)) [2020-11-06 22:00:04,502 INFO L266 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-11-06 22:00:04,502 INFO L269 CegarLoopResult]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-11-06 22:00:04,502 INFO L262 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|)) [2020-11-06 22:00:04,503 INFO L262 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))))) [2020-11-06 22:00:04,503 INFO L266 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-11-06 22:00:04,503 INFO L266 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-06 22:00:04,503 INFO L266 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-11-06 22:00:04,503 INFO L266 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-11-06 22:00:04,503 INFO L266 CegarLoopResult]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-11-06 22:00:04,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:00:04 BoogieIcfgContainer [2020-11-06 22:00:04,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:00:04,510 INFO L168 Benchmark]: Toolchain (without parser) took 32038.73 ms. Allocated memory was 161.5 MB in the beginning and 412.1 MB in the end (delta: 250.6 MB). Free memory was 137.3 MB in the beginning and 249.8 MB in the end (delta: -112.5 MB). Peak memory consumption was 240.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:00:04,511 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:00:04,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.54 ms. Allocated memory is still 161.5 MB. Free memory was 136.8 MB in the beginning and 127.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:00:04,512 INFO L168 Benchmark]: Boogie Preprocessor took 61.15 ms. Allocated memory is still 161.5 MB. Free memory was 126.9 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:00:04,513 INFO L168 Benchmark]: RCFGBuilder took 403.69 ms. Allocated memory is still 161.5 MB. Free memory was 125.6 MB in the beginning and 111.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:00:04,514 INFO L168 Benchmark]: TraceAbstraction took 31311.81 ms. Allocated memory was 161.5 MB in the beginning and 412.1 MB in the end (delta: 250.6 MB). Free memory was 111.2 MB in the beginning and 249.8 MB in the end (delta: -138.6 MB). Peak memory consumption was 214.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:00:04,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 161.5 MB. Free memory is still 133.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.54 ms. Allocated memory is still 161.5 MB. Free memory was 136.8 MB in the beginning and 127.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.15 ms. Allocated memory is still 161.5 MB. Free memory was 126.9 MB in the beginning and 125.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.69 ms. Allocated memory is still 161.5 MB. Free memory was 125.6 MB in the beginning and 111.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31311.81 ms. Allocated memory was 161.5 MB in the beginning and 412.1 MB in the end (delta: 250.6 MB). Free memory was 111.2 MB in the beginning and 249.8 MB in the end (delta: -138.6 MB). Peak memory consumption was 214.3 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: 25.7s, OverallIterations: 9, TraceHistogramMax: 27, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 253 SDtfs, 438 SDslu, 421 SDs, 0 SdLazy, 3749 SolverSat, 1081 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1469 GetRequests, 1143 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 13.1s 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: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 499 PreInvPairs, 1109 NumberOfFragments, 183 HoareAnnotationTreeSize, 499 FomulaSimplifications, 118992 FormulaSimplificationTreeSizeReduction, 3.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 8146 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.2s 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...