/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:06:31,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:06:31,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:06:32,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:06:32,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:06:32,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:06:32,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:06:32,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:06:32,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:06:32,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:06:32,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:06:32,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:06:32,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:06:32,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:06:32,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:06:32,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:06:32,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:06:32,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:06:32,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:06:32,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:06:32,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:06:32,107 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:06:32,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:06:32,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:06:32,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:06:32,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:06:32,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:06:32,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:06:32,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:06:32,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:06:32,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:06:32,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:06:32,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:06:32,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:06:32,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:06:32,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:06:32,114 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:06:32,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:06:32,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:06:32,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:06:32,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:06:32,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:06:32,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:06:32,117 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:06:32,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:06:32,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:06:32,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:06:32,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:06:32,628 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:06:32,629 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:06:32,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-24 04:06:32,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16da13178/e851bfe31bca4a62a1764860c0ea3525/FLAGd8780932e [2021-02-24 04:06:33,484 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:06:33,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-24 04:06:33,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16da13178/e851bfe31bca4a62a1764860c0ea3525/FLAGd8780932e [2021-02-24 04:06:33,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16da13178/e851bfe31bca4a62a1764860c0ea3525 [2021-02-24 04:06:33,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:06:33,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:06:33,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:06:33,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:06:33,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:06:33,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:06:33" (1/1) ... [2021-02-24 04:06:33,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f65ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:33, skipping insertion in model container [2021-02-24 04:06:33,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:06:33" (1/1) ... [2021-02-24 04:06:33,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:06:33,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:06:34,181 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] [2021-02-24 04:06:34,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:06:34,199 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:06:34,218 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] [2021-02-24 04:06:34,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:06:34,236 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:06:34,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34 WrapperNode [2021-02-24 04:06:34,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:06:34,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:06:34,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:06:34,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:06:34,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (1/1) ... [2021-02-24 04:06:34,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:06:34,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:06:34,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:06:34,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:06:34,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (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 [2021-02-24 04:06:34,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:06:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:06:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:06:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-24 04:06:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-24 04:06:34,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:06:34,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:06:34,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:06:34,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:06:34,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:06:34,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:06:34,373 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-24 04:06:34,373 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-24 04:06:34,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:06:34,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:06:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:06:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:06:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:06:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:06:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:06:34,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:06:34,694 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:06:34,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:06:34 BoogieIcfgContainer [2021-02-24 04:06:34,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:06:34,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:06:34,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:06:34,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:06:34,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:06:33" (1/3) ... [2021-02-24 04:06:34,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ad1d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:06:34, skipping insertion in model container [2021-02-24 04:06:34,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:06:34" (2/3) ... [2021-02-24 04:06:34,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ad1d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:06:34, skipping insertion in model container [2021-02-24 04:06:34,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:06:34" (3/3) ... [2021-02-24 04:06:34,711 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-02-24 04:06:34,726 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:06:34,734 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:06:34,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:06:34,783 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:06:34,783 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:06:34,784 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:06:34,784 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:06:34,784 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:06:34,784 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:06:34,784 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:06:34,784 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:06:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-24 04:06:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 04:06:34,819 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:34,820 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] [2021-02-24 04:06:34,821 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:34,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-24 04:06:34,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:34,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033047896] [2021-02-24 04:06:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:34,912 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:06:35,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033047896] [2021-02-24 04:06:35,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:35,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:06:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684176647] [2021-02-24 04:06:35,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:06:35,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:06:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:06:35,210 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-24 04:06:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:35,634 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-24 04:06:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:06:35,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-24 04:06:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:35,648 INFO L225 Difference]: With dead ends: 67 [2021-02-24 04:06:35,648 INFO L226 Difference]: Without dead ends: 50 [2021-02-24 04:06:35,653 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 [2021-02-24 04:06:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-24 04:06:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-24 04:06:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 04:06:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-24 04:06:35,755 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-24 04:06:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:35,756 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-24 04:06:35,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:06:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-24 04:06:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 04:06:35,760 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:35,760 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] [2021-02-24 04:06:35,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:06:35,761 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-24 04:06:35,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:35,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547170728] [2021-02-24 04:06:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:35,780 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:35,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:35,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:06:35,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547170728] [2021-02-24 04:06:35,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:35,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:06:35,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644035731] [2021-02-24 04:06:35,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:06:35,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:35,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:06:35,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:06:35,900 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-24 04:06:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:36,126 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-24 04:06:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:06:36,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-24 04:06:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:36,129 INFO L225 Difference]: With dead ends: 58 [2021-02-24 04:06:36,129 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 04:06:36,131 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 [2021-02-24 04:06:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 04:06:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-24 04:06:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 04:06:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-24 04:06:36,148 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-24 04:06:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:36,148 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-24 04:06:36,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:06:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-24 04:06:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 04:06:36,151 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:36,151 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] [2021-02-24 04:06:36,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:06:36,152 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:36,152 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-24 04:06:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551607723] [2021-02-24 04:06:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:36,156 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:36,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,294 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 04:06:36,294 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 04:06:36,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:06:36,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:36,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-24 04:06:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 04:06:36,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551607723] [2021-02-24 04:06:36,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:36,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:06:36,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559274533] [2021-02-24 04:06:36,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:06:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:06:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:06:36,377 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-02-24 04:06:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:36,772 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-24 04:06:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:06:36,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-24 04:06:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:36,775 INFO L225 Difference]: With dead ends: 90 [2021-02-24 04:06:36,775 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 04:06:36,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:06:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 04:06:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-24 04:06:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-24 04:06:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-24 04:06:36,795 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-24 04:06:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:36,796 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-24 04:06:36,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:06:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-24 04:06:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:06:36,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:36,798 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] [2021-02-24 04:06:36,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:06:36,799 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-24 04:06:36,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:36,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489590443] [2021-02-24 04:06:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:36,803 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:36,858 WARN L141 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-02-24 04:06:36,859 WARN L147 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size 7 [2021-02-24 04:06:36,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:36,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 04:06:36,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:36,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:36,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:36,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:36,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:36,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:06:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:37,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:06:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489590443] [2021-02-24 04:06:37,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:37,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:06:37,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088405298] [2021-02-24 04:06:37,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:06:37,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:37,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:06:37,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:06:37,037 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2021-02-24 04:06:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:37,744 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-02-24 04:06:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 04:06:37,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2021-02-24 04:06:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:37,751 INFO L225 Difference]: With dead ends: 73 [2021-02-24 04:06:37,751 INFO L226 Difference]: Without dead ends: 67 [2021-02-24 04:06:37,752 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 [2021-02-24 04:06:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-24 04:06:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-02-24 04:06:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 04:06:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-02-24 04:06:37,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 42 [2021-02-24 04:06:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:37,800 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-02-24 04:06:37,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:06:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-02-24 04:06:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 04:06:37,811 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:37,811 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] [2021-02-24 04:06:37,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:06:37,812 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 272544205, now seen corresponding path program 1 times [2021-02-24 04:06:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:37,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322494575] [2021-02-24 04:06:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:37,818 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:37,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:37,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:37,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:37,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:37,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:37,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:37,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:06:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:38,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 04:06:38,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322494575] [2021-02-24 04:06:38,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:38,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:06:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339451535] [2021-02-24 04:06:38,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:06:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:06:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:06:38,063 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 9 states. [2021-02-24 04:06:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:38,642 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-02-24 04:06:38,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:06:38,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-02-24 04:06:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:38,644 INFO L225 Difference]: With dead ends: 109 [2021-02-24 04:06:38,644 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 04:06:38,646 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 [2021-02-24 04:06:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 04:06:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-24 04:06:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-24 04:06:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-02-24 04:06:38,663 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 43 [2021-02-24 04:06:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:38,663 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-02-24 04:06:38,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:06:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-02-24 04:06:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-24 04:06:38,666 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:38,666 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] [2021-02-24 04:06:38,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:06:38,666 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-24 04:06:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:38,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778555799] [2021-02-24 04:06:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:38,671 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,779 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-24 04:06:38,780 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-24 04:06:38,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:06:38,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:38,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-24 04:06:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-24 04:06:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:38,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:38,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-24 04:06:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778555799] [2021-02-24 04:06:38,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:38,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:06:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292884867] [2021-02-24 04:06:38,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:06:38,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:06:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:06:38,835 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2021-02-24 04:06:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:39,173 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-02-24 04:06:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:06:39,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2021-02-24 04:06:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:39,176 INFO L225 Difference]: With dead ends: 112 [2021-02-24 04:06:39,177 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 04:06:39,178 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 [2021-02-24 04:06:39,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 04:06:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-24 04:06:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 04:06:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-02-24 04:06:39,197 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 58 [2021-02-24 04:06:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:39,198 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-02-24 04:06:39,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:06:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-02-24 04:06:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-24 04:06:39,200 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:39,200 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] [2021-02-24 04:06:39,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:06:39,200 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-24 04:06:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:39,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645313806] [2021-02-24 04:06:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:39,204 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,321 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:06:39,322 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:06:39,332 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:06:39,333 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:06:39,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:06:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:06:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-24 04:06:39,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645313806] [2021-02-24 04:06:39,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:39,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:06:39,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230904297] [2021-02-24 04:06:39,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:06:39,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:06:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:06:39,437 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 10 states. [2021-02-24 04:06:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:39,896 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-02-24 04:06:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:06:39,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-02-24 04:06:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:39,899 INFO L225 Difference]: With dead ends: 114 [2021-02-24 04:06:39,900 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 04:06:39,901 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 [2021-02-24 04:06:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 04:06:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-24 04:06:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 04:06:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-02-24 04:06:39,921 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2021-02-24 04:06:39,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:39,921 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-02-24 04:06:39,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:06:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-02-24 04:06:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 04:06:39,923 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:06:39,923 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] [2021-02-24 04:06:39,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 04:06:39,924 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:06:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:06:39,924 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-24 04:06:39,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:06:39,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040637762] [2021-02-24 04:06:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:06:39,927 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:06:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:39,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:06:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:39,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-24 04:06:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:39,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:39,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:40,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:06:40,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:40,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:40,042 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-24 04:06:40,043 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-24 04:06:40,054 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-24 04:06:40,055 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-24 04:06:40,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:06:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-24 04:06:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:40,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:40,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-24 04:06:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:40,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 04:06:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:06:40,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:06:40,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:06:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-24 04:06:40,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040637762] [2021-02-24 04:06:40,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:06:40,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-24 04:06:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434676492] [2021-02-24 04:06:40,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 04:06:40,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:06:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 04:06:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:06:40,107 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2021-02-24 04:06:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:06:40,558 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-02-24 04:06:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:06:40,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-24 04:06:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:06:40,560 INFO L225 Difference]: With dead ends: 64 [2021-02-24 04:06:40,560 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 04:06:40,562 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 [2021-02-24 04:06:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 04:06:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 04:06:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 04:06:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 04:06:40,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2021-02-24 04:06:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:06:40,563 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 04:06:40,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 04:06:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 04:06:40,563 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 04:06:40,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:06:40,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 04:06:41,611 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-02-24 04:06:42,321 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-24 04:06:42,578 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2021-02-24 04:06:42,872 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-24 04:06:43,127 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2021-02-24 04:06:43,245 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-24 04:06:43,245 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-24 04:06:43,245 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-24 04:06:43,245 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,245 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,246 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|)) [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,246 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,247 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,247 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 04:06:43,247 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) the Hoare annotation is: false [2021-02-24 04:06:43,247 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2021-02-24 04:06:43,247 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-24 04:06:43,247 INFO L185 CegarLoopUtils]: At program point mainFINAL(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-24 04:06:43,247 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: false [2021-02-24 04:06:43,247 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)) [2021-02-24 04:06:43,247 INFO L185 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: false [2021-02-24 04:06:43,248 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (= main_~x~0 2) [2021-02-24 04:06:43,248 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)) [2021-02-24 04:06:43,248 INFO L185 CegarLoopUtils]: At program point L40-2(lines 40 42) the Hoare annotation is: (= main_~x~0 2) [2021-02-24 04:06:43,248 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)) [2021-02-24 04:06:43,248 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)) [2021-02-24 04:06:43,248 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-02-24 04:06:43,249 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,249 INFO L185 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,249 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)) [2021-02-24 04:06:43,249 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,249 INFO L185 CegarLoopUtils]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2021-02-24 04:06:43,249 INFO L185 CegarLoopUtils]: At program point L25-3(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,250 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 0)) [2021-02-24 04:06:43,250 INFO L185 CegarLoopUtils]: At program point L25-4(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,250 INFO L185 CegarLoopUtils]: At program point L20(lines 20 26) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2021-02-24 04:06:43,250 INFO L185 CegarLoopUtils]: At program point L25-5(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,250 INFO L185 CegarLoopUtils]: At program point L25-6(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-24 04:06:43,251 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|)))) [2021-02-24 04:06:43,251 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|)))) [2021-02-24 04:06:43,251 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-02-24 04:06:43,251 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-02-24 04:06:43,251 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))) [2021-02-24 04:06:43,252 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|)) [2021-02-24 04:06:43,252 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))) [2021-02-24 04:06:43,252 INFO L185 CegarLoopUtils]: At program point L12(lines 12 16) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 0 fibo1_~n)) [2021-02-24 04:06:43,252 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))) [2021-02-24 04:06:43,252 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 0) (= fibo1_~n |fibo1_#in~n|)) [2021-02-24 04:06:43,252 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))) [2021-02-24 04:06:43,253 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))) [2021-02-24 04:06:43,253 INFO L185 CegarLoopUtils]: At program point L10(lines 10 16) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2021-02-24 04:06:43,253 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|))))) [2021-02-24 04:06:43,253 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))) [2021-02-24 04:06:43,253 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))) [2021-02-24 04:06:43,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:06:43 BoogieIcfgContainer [2021-02-24 04:06:43,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:06:43,274 INFO L168 Benchmark]: Toolchain (without parser) took 9391.99 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 134.0 MB in the beginning and 100.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 149.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:06:43,275 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 131.1 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:06:43,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.42 ms. Allocated memory is still 157.3 MB. Free memory was 132.9 MB in the beginning and 123.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:06:43,276 INFO L168 Benchmark]: Boogie Preprocessor took 34.16 ms. Allocated memory is still 157.3 MB. Free memory was 123.4 MB in the beginning and 122.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:06:43,276 INFO L168 Benchmark]: RCFGBuilder took 423.34 ms. Allocated memory is still 157.3 MB. Free memory was 122.0 MB in the beginning and 139.0 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:06:43,277 INFO L168 Benchmark]: TraceAbstraction took 8574.77 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 138.4 MB in the beginning and 100.2 MB in the end (delta: 38.3 MB). Peak memory consumption was 154.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:06:43,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 131.1 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.42 ms. Allocated memory is still 157.3 MB. Free memory was 132.9 MB in the beginning and 123.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.16 ms. Allocated memory is still 157.3 MB. Free memory was 123.4 MB in the beginning and 122.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 423.34 ms. Allocated memory is still 157.3 MB. Free memory was 122.0 MB in the beginning and 139.0 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8574.77 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 138.4 MB in the beginning and 100.2 MB in the end (delta: 38.3 MB). Peak memory consumption was 154.1 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: 5.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, 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, 1.8s 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: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 54 LocationsWithAnnotation, 376 PreInvPairs, 526 NumberOfFragments, 500 HoareAnnotationTreeSize, 376 FomulaSimplifications, 12087 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 54 FomulaSimplificationsInter, 3394 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...