/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-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:50:34,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:50:34,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:50:34,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:50:34,203 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 22:50:34,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:50:34,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:50:34,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:50:34,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:50:34,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:50:34,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:50:34,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:50:34,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:50:34,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:50:34,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:50:34,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:50:34,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:50:34,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:50:34,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:50:34,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:50:34,221 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:50:34,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:50:34,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:50:34,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:50:34,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:50:34,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:50:34,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:50:34,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:50:34,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:50:34,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:50:34,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:50:34,689 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:50:34,690 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:50:34,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-23 22:50:34,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6d8b53b/b5a522acc94e47e7b7d96d282f2cc363/FLAG2b4bd16d7 [2021-02-23 22:50:35,516 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:50:35,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-23 22:50:35,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6d8b53b/b5a522acc94e47e7b7d96d282f2cc363/FLAG2b4bd16d7 [2021-02-23 22:50:35,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6d8b53b/b5a522acc94e47e7b7d96d282f2cc363 [2021-02-23 22:50:35,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:50:35,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:50:35,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:50:35,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:50:35,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:50:35,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:50:35" (1/1) ... [2021-02-23 22:50:35,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103a7665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:35, skipping insertion in model container [2021-02-23 22:50:35,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:50:35" (1/1) ... [2021-02-23 22:50:35,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:50:35,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:50:36,086 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-simple/fibo_2calls_2-2.c[946,959] [2021-02-23 22:50:36,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:50:36,101 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:50:36,121 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-simple/fibo_2calls_2-2.c[946,959] [2021-02-23 22:50:36,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:50:36,139 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:50:36,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36 WrapperNode [2021-02-23 22:50:36,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:50:36,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:50:36,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:50:36,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:50:36,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (1/1) ... [2021-02-23 22:50:36,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:50:36,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:50:36,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:50:36,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:50:36,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (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 22:50:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:50:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:50:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:50:36,295 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-23 22:50:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-23 22:50:36,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:50:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:50:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:50:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:50:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:50:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:50:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-23 22:50:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-23 22:50:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:50:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:50:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:50:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:50:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:50:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:50:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:50:36,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:50:36,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 22:50:36,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:50:36 BoogieIcfgContainer [2021-02-23 22:50:36,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:50:36,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:50:36,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:50:36,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:50:36,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:50:35" (1/3) ... [2021-02-23 22:50:36,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26223210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:50:36, skipping insertion in model container [2021-02-23 22:50:36,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:50:36" (2/3) ... [2021-02-23 22:50:36,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26223210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:50:36, skipping insertion in model container [2021-02-23 22:50:36,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:50:36" (3/3) ... [2021-02-23 22:50:36,724 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-02-23 22:50:36,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:50:36,738 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:50:36,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:50:36,804 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:50:36,804 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:50:36,804 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:50:36,804 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:50:36,805 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:50:36,805 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:50:36,805 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:50:36,805 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:50:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 22:50:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 22:50:36,843 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:36,844 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] [2021-02-23 22:50:36,844 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-23 22:50:36,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:36,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353539792] [2021-02-23 22:50:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:37,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:37,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:37,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:37,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:37,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:37,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:37,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:37,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:37,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:37,404 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 22:50:37,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353539792] [2021-02-23 22:50:37,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:50:37,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:50:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926718892] [2021-02-23 22:50:37,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:50:37,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:50:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:50:37,433 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-23 22:50:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:38,021 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-23 22:50:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:50:38,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 22:50:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:38,054 INFO L225 Difference]: With dead ends: 67 [2021-02-23 22:50:38,054 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 22:50:38,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:50:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 22:50:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-23 22:50:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 22:50:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 22:50:38,115 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-23 22:50:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:38,115 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 22:50:38,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:50:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 22:50:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 22:50:38,118 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:38,118 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] [2021-02-23 22:50:38,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:50:38,119 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-23 22:50:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:38,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996487724] [2021-02-23 22:50:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,249 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 22:50:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996487724] [2021-02-23 22:50:38,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:50:38,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 22:50:38,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546522360] [2021-02-23 22:50:38,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:50:38,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:50:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:50:38,254 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-23 22:50:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:38,561 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 22:50:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:50:38,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-23 22:50:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:38,564 INFO L225 Difference]: With dead ends: 58 [2021-02-23 22:50:38,564 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 22:50:38,565 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 22:50:38,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 22:50:38,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 22:50:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 22:50:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 22:50:38,586 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-23 22:50:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:38,587 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 22:50:38,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:50:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 22:50:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 22:50:38,589 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:38,589 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:50:38,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:50:38,590 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:38,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-23 22:50:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:38,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864579385] [2021-02-23 22:50:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,698 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 22:50:38,698 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 22:50:38,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:50:38,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:38,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 22:50:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:38,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:38,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 22:50:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864579385] [2021-02-23 22:50:38,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:38,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:50:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635529848] [2021-02-23 22:50:38,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:50:38,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:50:38,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:50:38,768 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-02-23 22:50:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:39,154 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-23 22:50:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:50:39,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-23 22:50:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:39,156 INFO L225 Difference]: With dead ends: 90 [2021-02-23 22:50:39,156 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 22:50:39,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:50:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 22:50:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-23 22:50:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 22:50:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 22:50:39,176 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-23 22:50:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:39,177 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 22:50:39,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:50:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 22:50:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 22:50:39,179 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:39,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:50:39,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:50:39,180 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-23 22:50:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:39,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037913048] [2021-02-23 22:50:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:39,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:39,262 WARN L141 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-02-23 22:50:39,263 WARN L147 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size 7 [2021-02-23 22:50:39,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:39,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:39,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:39,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 22:50:39,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:39,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:39,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:50:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:39,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:39,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:39,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 22:50:39,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037913048] [2021-02-23 22:50:39,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:39,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 22:50:39,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152294817] [2021-02-23 22:50:39,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:50:39,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:39,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:50:39,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:50:39,505 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2021-02-23 22:50:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:40,220 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-02-23 22:50:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 22:50:40,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2021-02-23 22:50:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:40,224 INFO L225 Difference]: With dead ends: 73 [2021-02-23 22:50:40,224 INFO L226 Difference]: Without dead ends: 67 [2021-02-23 22:50:40,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-23 22:50:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-23 22:50:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-02-23 22:50:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 22:50:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-02-23 22:50:40,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 42 [2021-02-23 22:50:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:40,255 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-02-23 22:50:40,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:50:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-02-23 22:50:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 22:50:40,259 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:40,259 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:50:40,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:50:40,260 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash 272544205, now seen corresponding path program 1 times [2021-02-23 22:50:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:40,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318652951] [2021-02-23 22:50:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:50:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:40,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 22:50:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318652951] [2021-02-23 22:50:40,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:40,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:50:40,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114207721] [2021-02-23 22:50:40,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:50:40,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:50:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:50:40,436 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 9 states. [2021-02-23 22:50:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:40,937 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-02-23 22:50:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 22:50:40,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-02-23 22:50:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:40,939 INFO L225 Difference]: With dead ends: 109 [2021-02-23 22:50:40,940 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 22:50:40,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:50:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 22:50:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-23 22:50:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 22:50:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-02-23 22:50:40,960 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 43 [2021-02-23 22:50:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:40,961 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-02-23 22:50:40,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:50:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-02-23 22:50:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 22:50:40,964 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:40,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:50:40,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:50:40,965 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-23 22:50:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:40,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983816873] [2021-02-23 22:50:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:40,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:40,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:40,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:40,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,062 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 22:50:41,062 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 22:50:41,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:50:41,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 22:50:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 22:50:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 22:50:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983816873] [2021-02-23 22:50:41,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:41,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:50:41,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482281783] [2021-02-23 22:50:41,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:50:41,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:50:41,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:50:41,121 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2021-02-23 22:50:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:41,500 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-02-23 22:50:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:50:41,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2021-02-23 22:50:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:41,502 INFO L225 Difference]: With dead ends: 112 [2021-02-23 22:50:41,502 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 22:50:41,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:50:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 22:50:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-23 22:50:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 22:50:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-02-23 22:50:41,557 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 58 [2021-02-23 22:50:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:41,557 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-02-23 22:50:41,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:50:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-02-23 22:50:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 22:50:41,568 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:41,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 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 22:50:41,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 22:50:41,569 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-23 22:50:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:41,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235643419] [2021-02-23 22:50:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,712 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 22:50:41,713 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 22:50:41,724 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 22:50:41,725 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 22:50:41,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:50:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:41,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:50:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:41,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:41,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 22:50:41,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235643419] [2021-02-23 22:50:41,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:41,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 22:50:41,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164074519] [2021-02-23 22:50:41,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:50:41,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:41,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:50:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:50:41,792 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 10 states. [2021-02-23 22:50:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:42,234 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-02-23 22:50:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:50:42,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-02-23 22:50:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:42,237 INFO L225 Difference]: With dead ends: 114 [2021-02-23 22:50:42,237 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 22:50:42,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:50:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 22:50:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-23 22:50:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 22:50:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-02-23 22:50:42,255 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2021-02-23 22:50:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:42,256 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-02-23 22:50:42,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:50:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-02-23 22:50:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 22:50:42,257 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:50:42,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 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 22:50:42,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 22:50:42,258 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:50:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:50:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-23 22:50:42,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:50:42,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412695260] [2021-02-23 22:50:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:50:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:42,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:50:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:50:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:42,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:50:42,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:42,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:42,403 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 22:50:42,404 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 22:50:42,415 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 22:50:42,418 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 22:50:42,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:50:42,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:50:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:50:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:50:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:50:42,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:50:42,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:50:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 22:50:42,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412695260] [2021-02-23 22:50:42,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:50:42,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:50:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557952668] [2021-02-23 22:50:42,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:50:42,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:50:42,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:50:42,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:50:42,470 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2021-02-23 22:50:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:50:42,906 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-02-23 22:50:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:50:42,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-23 22:50:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:50:42,910 INFO L225 Difference]: With dead ends: 64 [2021-02-23 22:50:42,910 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 22:50:42,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:50:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 22:50:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 22:50:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 22:50:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 22:50:42,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2021-02-23 22:50:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:50:42,913 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 22:50:42,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:50:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 22:50:42,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 22:50:42,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 22:50:42,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 22:50:44,030 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-02-23 22:50:44,733 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-23 22:50:44,940 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2021-02-23 22:50:45,159 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-23 22:50:45,380 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2021-02-23 22:50:45,491 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-23 22:50:45,491 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-23 22:50:45,491 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-23 22:50:45,492 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,492 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,492 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,492 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,492 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,492 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 22:50:45,493 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) the Hoare annotation is: false [2021-02-23 22:50:45,494 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2021-02-23 22:50:45,494 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-23 22:50:45,494 INFO L185 CegarLoopUtils]: At program point mainFINAL(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-23 22:50:45,494 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: false [2021-02-23 22:50:45,494 INFO L185 CegarLoopUtils]: At program point L40(lines 40 42) the Hoare annotation is: (and (<= main_~result~0 1) (= main_~x~0 2) (< 0 main_~result~0)) [2021-02-23 22:50:45,495 INFO L185 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: false [2021-02-23 22:50:45,495 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (= main_~x~0 2) [2021-02-23 22:50:45,495 INFO L185 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= |main_#t~ret11| 1) (= main_~x~0 2)) [2021-02-23 22:50:45,495 INFO L185 CegarLoopUtils]: At program point L40-2(lines 40 42) the Hoare annotation is: (= main_~x~0 2) [2021-02-23 22:50:45,495 INFO L185 CegarLoopUtils]: At program point L39-2(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= |main_#t~ret11| 1) (= main_~x~0 2)) [2021-02-23 22:50:45,496 INFO L185 CegarLoopUtils]: At program point L39-3(line 39) the Hoare annotation is: (and (<= 1 |main_#t~ret11|) (<= main_~result~0 1) (<= |main_#t~ret11| 1) (= main_~x~0 2) (< 0 main_~result~0)) [2021-02-23 22:50:45,497 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-02-23 22:50:45,497 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,497 INFO L185 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,497 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 1)) [2021-02-23 22:50:45,499 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,499 INFO L185 CegarLoopUtils]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2021-02-23 22:50:45,499 INFO L185 CegarLoopUtils]: At program point L25-3(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,499 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 0)) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point L25-4(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point L20(lines 20 26) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point L25-5(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point L25-6(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point fibo2FINAL(lines 19 27) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (< 1 fibo2_~n)) (and (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1) .cse0) (and .cse0 (<= |fibo2_#in~n| 0)))) (or (<= 1 fibo2_~n) (and (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|)))) [2021-02-23 22:50:45,500 INFO L185 CegarLoopUtils]: At program point fibo2EXIT(lines 19 27) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and .cse0 (< 1 fibo2_~n)) (and (<= 1 |fibo2_#res|) (<= |fibo2_#res| 1) .cse0) (and .cse0 (<= |fibo2_#in~n| 0)))) (or (<= 1 fibo2_~n) (and (<= |fibo2_#res| 0) (<= 0 |fibo2_#res|)))) [2021-02-23 22:50:45,501 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-02-23 22:50:45,501 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-02-23 22:50:45,501 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0) (and (<= 3 fibo1_~n) .cse0))) [2021-02-23 22:50:45,501 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (<= |fibo1_#in~n| 1) (< 0 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-02-23 22:50:45,501 INFO L185 CegarLoopUtils]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0) (and (<= 3 fibo1_~n) .cse0))) [2021-02-23 22:50:45,501 INFO L185 CegarLoopUtils]: At program point L12(lines 12 16) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 0 fibo1_~n)) [2021-02-23 22:50:45,502 INFO L185 CegarLoopUtils]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse1 (= fibo1_~n |fibo1_#in~n|))) (or (let ((.cse0 (+ |fibo1_#t~ret7| |fibo1_#t~ret8|))) (and (<= 1 |fibo1_#t~ret7|) (<= 1 .cse0) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse1 (<= .cse0 1))) (and (<= 3 fibo1_~n) .cse1))) [2021-02-23 22:50:45,502 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 0) (= fibo1_~n |fibo1_#in~n|)) [2021-02-23 22:50:45,502 INFO L185 CegarLoopUtils]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse1 (= fibo1_~n |fibo1_#in~n|))) (or (let ((.cse0 (+ |fibo1_#t~ret7| |fibo1_#t~ret8|))) (and (<= 1 |fibo1_#t~ret7|) (<= 1 .cse0) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse1 (<= .cse0 1))) (and (<= 3 fibo1_~n) .cse1))) [2021-02-23 22:50:45,503 INFO L185 CegarLoopUtils]: At program point fibo1FINAL(lines 9 17) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (or (<= |fibo1_#in~n| 1) (and (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|))) .cse0) (and (<= 3 fibo1_~n) .cse0))) [2021-02-23 22:50:45,503 INFO L185 CegarLoopUtils]: At program point L10(lines 10 16) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2021-02-23 22:50:45,503 INFO L185 CegarLoopUtils]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 fibo1_~n) .cse0) (let ((.cse1 (+ |fibo1_#t~ret7| |fibo1_#t~ret8|))) (and (<= 1 |fibo1_#t~ret7|) (<= 1 .cse1) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0 (<= |fibo1_#res| 1) (<= .cse1 1) (<= 1 |fibo1_#res|))))) [2021-02-23 22:50:45,503 INFO L185 CegarLoopUtils]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (< 1 fibo1_~n) .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|)) (and (<= 3 fibo1_~n) .cse0))) [2021-02-23 22:50:45,504 INFO L185 CegarLoopUtils]: At program point fibo1EXIT(lines 9 17) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (or (<= |fibo1_#in~n| 1) (and (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|))) .cse0) (and (<= 3 fibo1_~n) .cse0))) [2021-02-23 22:50:45,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:50:45 BoogieIcfgContainer [2021-02-23 22:50:45,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:50:45,525 INFO L168 Benchmark]: Toolchain (without parser) took 9627.22 ms. Allocated memory was 153.1 MB in the beginning and 286.3 MB in the end (delta: 133.2 MB). Free memory was 129.8 MB in the beginning and 260.1 MB in the end (delta: -130.3 MB). Peak memory consumption was 161.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:50:45,525 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:50:45,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.17 ms. Allocated memory is still 153.1 MB. Free memory was 128.7 MB in the beginning and 118.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:50:45,526 INFO L168 Benchmark]: Boogie Preprocessor took 35.98 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 22:50:45,527 INFO L168 Benchmark]: RCFGBuilder took 532.08 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 101.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 22:50:45,528 INFO L168 Benchmark]: TraceAbstraction took 8809.64 ms. Allocated memory was 153.1 MB in the beginning and 286.3 MB in the end (delta: 133.2 MB). Free memory was 101.1 MB in the beginning and 260.1 MB in the end (delta: -159.0 MB). Peak memory consumption was 131.8 MB. Max. memory is 8.0 GB. [2021-02-23 22:50:45,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.17 ms. Allocated memory is still 153.1 MB. Free memory was 128.7 MB in the beginning and 118.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.98 ms. Allocated memory is still 153.1 MB. Free memory was 118.8 MB in the beginning and 117.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 532.08 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 101.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8809.64 ms. Allocated memory was 153.1 MB in the beginning and 286.3 MB in the end (delta: 133.2 MB). Free memory was 101.1 MB in the beginning and 260.1 MB in the end (delta: -159.0 MB). Peak memory consumption was 131.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 37]: Procedure Contract for main Derived contract for procedure main: x == 2 - ProcedureContractResult [Line: 19]: Procedure Contract for fibo2 Derived contract for procedure fibo2: (((n == \old(n) && 1 < n) || ((1 <= \result && \result <= 1) && n == \old(n))) || (n == \old(n) && \old(n) <= 0)) && (1 <= n || (\result <= 0 && 0 <= \result)) - ProcedureContractResult [Line: 9]: Procedure Contract for fibo1 Derived contract for procedure fibo1: ((\old(n) <= 1 || (\result <= 1 && 1 <= \result)) && n == \old(n)) || (3 <= n && n == \old(n)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 500 SDslu, 634 SDs, 0 SdLazy, 1564 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 54 LocationsWithAnnotation, 376 PreInvPairs, 526 NumberOfFragments, 500 HoareAnnotationTreeSize, 376 FomulaSimplifications, 12087 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 54 FomulaSimplificationsInter, 3394 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 352 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 41110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 43/67 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...