/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:39:22,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:39:22,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:39:22,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:39:22,886 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:39:22,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:39:22,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:39:22,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:39:22,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:39:22,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:39:22,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:39:22,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:39:22,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:39:22,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:39:22,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:39:22,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:39:22,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:39:22,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:39:22,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:39:22,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:39:22,904 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:39:22,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:39:22,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:39:22,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:39:22,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:39:22,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:39:22,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:39:22,906 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:39:23,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:39:23,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:39:23,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:39:23,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:39:23,299 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:39:23,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2021-02-23 22:39:23,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc7ce3ab/cde40b9a12a74486944fa211897c5f49/FLAG110293d3e [2021-02-23 22:39:23,984 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:39:23,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2021-02-23 22:39:23,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc7ce3ab/cde40b9a12a74486944fa211897c5f49/FLAG110293d3e [2021-02-23 22:39:24,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc7ce3ab/cde40b9a12a74486944fa211897c5f49 [2021-02-23 22:39:24,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:39:24,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:39:24,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:39:24,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:39:24,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:39:24,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcada52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24, skipping insertion in model container [2021-02-23 22:39:24,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:39:24,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:39:24,560 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c[780,793] [2021-02-23 22:39:24,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:39:24,579 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:39:24,605 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c[780,793] [2021-02-23 22:39:24,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:39:24,630 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:39:24,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24 WrapperNode [2021-02-23 22:39:24,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:39:24,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:39:24,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:39:24,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:39:24,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (1/1) ... [2021-02-23 22:39:24,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:39:24,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:39:24,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:39:24,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:39:24,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (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 [2021-02-23 22:39:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:39:24,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:39:24,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:39:24,854 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-02-23 22:39:24,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:39:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:39:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:39:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-02-23 22:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:39:25,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:39:25,284 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:39:25,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:39:25 BoogieIcfgContainer [2021-02-23 22:39:25,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:39:25,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:39:25,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:39:25,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:39:25,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:39:24" (1/3) ... [2021-02-23 22:39:25,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f68b2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:39:25, skipping insertion in model container [2021-02-23 22:39:25,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:39:24" (2/3) ... [2021-02-23 22:39:25,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f68b2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:39:25, skipping insertion in model container [2021-02-23 22:39:25,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:39:25" (3/3) ... [2021-02-23 22:39:25,297 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2021-02-23 22:39:25,305 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:39:25,311 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:39:25,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:39:25,390 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:39:25,390 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:39:25,390 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:39:25,390 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:39:25,390 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:39:25,391 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:39:25,391 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:39:25,391 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:39:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-23 22:39:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 22:39:25,431 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:25,433 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2021-02-23 22:39:25,433 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1720389558, now seen corresponding path program 1 times [2021-02-23 22:39:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:25,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729872383] [2021-02-23 22:39:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:25,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:25,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:25,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:25,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:25,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:25,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:25,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:25,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:39:25,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729872383] [2021-02-23 22:39:25,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:39:25,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:39:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883133437] [2021-02-23 22:39:25,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:39:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:39:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:39:25,977 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2021-02-23 22:39:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:26,490 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-02-23 22:39:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:39:26,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-23 22:39:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:26,503 INFO L225 Difference]: With dead ends: 57 [2021-02-23 22:39:26,503 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 22:39:26,507 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 [2021-02-23 22:39:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 22:39:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 22:39:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 22:39:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-02-23 22:39:26,574 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2021-02-23 22:39:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:26,574 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-02-23 22:39:26,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:39:26,575 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-02-23 22:39:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 22:39:26,577 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:26,577 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-02-23 22:39:26,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:39:26,578 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash 529255775, now seen corresponding path program 1 times [2021-02-23 22:39:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:26,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734496621] [2021-02-23 22:39:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:26,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:26,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:26,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:26,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:26,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:26,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:26,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:26,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:39:26,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734496621] [2021-02-23 22:39:26,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:39:26,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:39:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416668910] [2021-02-23 22:39:26,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:39:26,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:39:26,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:39:26,746 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2021-02-23 22:39:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:27,072 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-23 22:39:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:39:27,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-23 22:39:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:27,075 INFO L225 Difference]: With dead ends: 46 [2021-02-23 22:39:27,075 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 22:39:27,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:39:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 22:39:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-02-23 22:39:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 22:39:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-02-23 22:39:27,099 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2021-02-23 22:39:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:27,099 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-02-23 22:39:27,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:39:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-02-23 22:39:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 22:39:27,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:27,101 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:27,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:39:27,102 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2022064132, now seen corresponding path program 1 times [2021-02-23 22:39:27,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:27,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636031186] [2021-02-23 22:39:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,258 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 22:39:27,259 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 22:39:27,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:27,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 22:39:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-23 22:39:27,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636031186] [2021-02-23 22:39:27,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:27,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-23 22:39:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931574361] [2021-02-23 22:39:27,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:39:27,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:39:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:39:27,310 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-02-23 22:39:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:27,624 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-02-23 22:39:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:39:27,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-02-23 22:39:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:27,629 INFO L225 Difference]: With dead ends: 62 [2021-02-23 22:39:27,630 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 22:39:27,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:39:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 22:39:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 22:39:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 22:39:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-02-23 22:39:27,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 43 [2021-02-23 22:39:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:27,652 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-02-23 22:39:27,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:39:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-02-23 22:39:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 22:39:27,654 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:27,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:27,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:39:27,655 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1557176765, now seen corresponding path program 1 times [2021-02-23 22:39:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:27,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579152148] [2021-02-23 22:39:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:27,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:27,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:27,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 22:39:27,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579152148] [2021-02-23 22:39:27,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:27,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:39:27,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072226733] [2021-02-23 22:39:27,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:39:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:39:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:39:27,808 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2021-02-23 22:39:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:28,206 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-02-23 22:39:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:39:28,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-23 22:39:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:28,209 INFO L225 Difference]: With dead ends: 66 [2021-02-23 22:39:28,209 INFO L226 Difference]: Without dead ends: 60 [2021-02-23 22:39:28,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:39:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-23 22:39:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-02-23 22:39:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 22:39:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-02-23 22:39:28,232 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 44 [2021-02-23 22:39:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:28,232 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-02-23 22:39:28,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:39:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-02-23 22:39:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-23 22:39:28,235 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:28,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:28,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:39:28,236 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 648924713, now seen corresponding path program 2 times [2021-02-23 22:39:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:28,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636016195] [2021-02-23 22:39:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,388 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 22:39:28,389 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 22:39:28,398 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 22:39:28,399 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 22:39:28,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-02-23 22:39:28,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636016195] [2021-02-23 22:39:28,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:28,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:39:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326920116] [2021-02-23 22:39:28,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:39:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:39:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:39:28,485 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 9 states. [2021-02-23 22:39:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:28,866 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2021-02-23 22:39:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:39:28,867 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2021-02-23 22:39:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:28,870 INFO L225 Difference]: With dead ends: 118 [2021-02-23 22:39:28,870 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 22:39:28,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:39:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 22:39:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-02-23 22:39:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 22:39:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-02-23 22:39:28,894 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 61 [2021-02-23 22:39:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:28,895 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-02-23 22:39:28,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:39:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-02-23 22:39:28,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 22:39:28,897 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:28,898 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:28,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:39:28,898 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1192280198, now seen corresponding path program 3 times [2021-02-23 22:39:28,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:28,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811192395] [2021-02-23 22:39:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:29,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:29,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-23 22:39:29,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811192395] [2021-02-23 22:39:29,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:29,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 22:39:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526031610] [2021-02-23 22:39:29,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:39:29,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:39:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:39:29,117 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 10 states. [2021-02-23 22:39:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:29,593 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-02-23 22:39:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:39:29,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2021-02-23 22:39:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:29,605 INFO L225 Difference]: With dead ends: 96 [2021-02-23 22:39:29,605 INFO L226 Difference]: Without dead ends: 90 [2021-02-23 22:39:29,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:39:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-23 22:39:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-02-23 22:39:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-23 22:39:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-02-23 22:39:29,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 62 [2021-02-23 22:39:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:29,660 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-02-23 22:39:29,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:39:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-02-23 22:39:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-02-23 22:39:29,667 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:29,667 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:29,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 22:39:29,668 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1291659719, now seen corresponding path program 4 times [2021-02-23 22:39:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:29,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552950180] [2021-02-23 22:39:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:29,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:29,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:29,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:29,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:29,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:29,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:29,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:29,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 22:39:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 22:39:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 36 proven. 197 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-02-23 22:39:30,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552950180] [2021-02-23 22:39:30,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:30,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:39:30,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980814197] [2021-02-23 22:39:30,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:39:30,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:30,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:39:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:39:30,172 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand 12 states. [2021-02-23 22:39:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:30,728 INFO L93 Difference]: Finished difference Result 146 states and 199 transitions. [2021-02-23 22:39:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:39:30,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2021-02-23 22:39:30,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:30,732 INFO L225 Difference]: With dead ends: 146 [2021-02-23 22:39:30,732 INFO L226 Difference]: Without dead ends: 140 [2021-02-23 22:39:30,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:39:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-23 22:39:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-02-23 22:39:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-02-23 22:39:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 178 transitions. [2021-02-23 22:39:30,770 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 178 transitions. Word has length 133 [2021-02-23 22:39:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:30,771 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 178 transitions. [2021-02-23 22:39:30,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:39:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 178 transitions. [2021-02-23 22:39:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-02-23 22:39:30,775 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:30,776 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:30,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 22:39:30,776 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash 573666925, now seen corresponding path program 5 times [2021-02-23 22:39:30,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:30,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151440139] [2021-02-23 22:39:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 22:39:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 22:39:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:31,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,115 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 22:39:31,116 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 22:39:31,129 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 22:39:31,129 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 22:39:31,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 22:39:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 22:39:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 410 proven. 102 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-02-23 22:39:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151440139] [2021-02-23 22:39:31,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:31,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-23 22:39:31,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705652080] [2021-02-23 22:39:31,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 22:39:31,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 22:39:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:39:31,309 INFO L87 Difference]: Start difference. First operand 128 states and 178 transitions. Second operand 13 states. [2021-02-23 22:39:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:32,171 INFO L93 Difference]: Finished difference Result 424 states and 757 transitions. [2021-02-23 22:39:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 22:39:32,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 203 [2021-02-23 22:39:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:32,175 INFO L225 Difference]: With dead ends: 424 [2021-02-23 22:39:32,176 INFO L226 Difference]: Without dead ends: 154 [2021-02-23 22:39:32,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-02-23 22:39:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-23 22:39:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-02-23 22:39:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-02-23 22:39:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-02-23 22:39:32,227 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 203 [2021-02-23 22:39:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:32,228 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-02-23 22:39:32,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 22:39:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-02-23 22:39:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-02-23 22:39:32,232 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:32,232 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:32,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 22:39:32,233 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1157257800, now seen corresponding path program 6 times [2021-02-23 22:39:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:32,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252299754] [2021-02-23 22:39:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:39:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:32,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 22:39:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:32,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 22:39:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:39:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:39:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:39:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 149 proven. 163 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-02-23 22:39:32,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252299754] [2021-02-23 22:39:32,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:32,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:39:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080705575] [2021-02-23 22:39:32,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:39:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:39:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:39:32,556 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand 12 states. [2021-02-23 22:39:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:32,995 INFO L93 Difference]: Finished difference Result 258 states and 321 transitions. [2021-02-23 22:39:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:39:32,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2021-02-23 22:39:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:32,998 INFO L225 Difference]: With dead ends: 258 [2021-02-23 22:39:32,998 INFO L226 Difference]: Without dead ends: 119 [2021-02-23 22:39:33,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:39:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-23 22:39:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-02-23 22:39:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-02-23 22:39:33,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-02-23 22:39:33,025 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 151 [2021-02-23 22:39:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:33,025 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-02-23 22:39:33,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:39:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-02-23 22:39:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-02-23 22:39:33,027 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:33,028 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:33,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 22:39:33,028 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1928970547, now seen corresponding path program 7 times [2021-02-23 22:39:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:33,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045551794] [2021-02-23 22:39:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:39:33,050 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:39:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:39:33,071 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:39:33,116 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:39:33,116 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:39:33,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 22:39:33,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:39:33 BoogieIcfgContainer [2021-02-23 22:39:33,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:39:33,212 INFO L168 Benchmark]: Toolchain (without parser) took 8863.58 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 126.5 MB in the beginning and 164.0 MB in the end (delta: -37.6 MB). Peak memory consumption was 87.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:39:33,213 INFO L168 Benchmark]: CDTParser took 0.94 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:39:33,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.85 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:39:33,213 INFO L168 Benchmark]: Boogie Preprocessor took 63.80 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:39:33,213 INFO L168 Benchmark]: RCFGBuilder took 583.49 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:39:33,214 INFO L168 Benchmark]: TraceAbstraction took 7921.49 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 100.1 MB in the beginning and 164.0 MB in the end (delta: -63.9 MB). Peak memory consumption was 61.2 MB. Max. memory is 8.0 GB. [2021-02-23 22:39:33,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.94 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.85 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.80 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 583.49 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 100.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7921.49 ms. Allocated memory was 151.0 MB in the beginning and 274.7 MB in the end (delta: 123.7 MB). Free memory was 100.1 MB in the beginning and 164.0 MB in the end (delta: -63.9 MB). Peak memory consumption was 61.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=5, x=5] [L31] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L19] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L21] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L21] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=3, \result=2, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=4, \result=3, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L19] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L21] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L21] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L24] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L19] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L20] return 0; VAL [\old(n)=0, \result=0, n=0] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=2, \result=1, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L24] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L24] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L19] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L21] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L22] return 1; VAL [\old(n)=1, \result=1, n=1] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=3, \result=2, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L24] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L24] return fibonacci(n-1) + fibonacci(n-2); VAL [\old(n)=5, \result=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L31] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L31] int result = fibonacci(x); VAL [fibonacci(x)=5, result=5, x=5] [L32] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L35] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.7s, OverallIterations: 10, TraceHistogramMax: 21, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 588 SDslu, 501 SDs, 0 SdLazy, 1320 SolverSat, 337 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred 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, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 900 NumberOfCodeBlocks, 900 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 741 ConstructedInterpolants, 0 QuantifiedInterpolants, 176467 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 2086/2593 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 incorrect! Received shutdown request...