/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-b7b32d2 [2021-02-22 01:41:42,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:41:42,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:41:42,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:41:43,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:41:43,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:41:43,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:41:43,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:41:43,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:41:43,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:41:43,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:41:43,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:41:43,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:41:43,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:41:43,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:41:43,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:41:43,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:41:43,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:41:43,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:41:43,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:41:43,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:41:43,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:41:43,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:41:43,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:41:43,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:41:43,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:41:43,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:41:43,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:41:43,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:41:43,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:41:43,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:41:43,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:41:43,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:41:43,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:41:43,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:41:43,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:41:43,219 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:41:43,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:41:43,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:41:43,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:41:43,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:41:43,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:41:43,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:41:43,221 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:41:43,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:41:43,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:41:43,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:41:43,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:41:43,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:41:43,808 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:41:43,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-22 01:41:43,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cab6811/df7dc0086abb4a8ba655bb1dc5c106c0/FLAG782df8b31 [2021-02-22 01:41:44,861 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:41:44,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2021-02-22 01:41:44,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cab6811/df7dc0086abb4a8ba655bb1dc5c106c0/FLAG782df8b31 [2021-02-22 01:41:45,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cab6811/df7dc0086abb4a8ba655bb1dc5c106c0 [2021-02-22 01:41:45,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:41:45,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:41:45,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:41:45,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:41:45,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:41:45,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6597fe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45, skipping insertion in model container [2021-02-22 01:41:45,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:41:45,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:41:45,647 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] [2021-02-22 01:41:45,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:41:45,668 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:41:45,689 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] [2021-02-22 01:41:45,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:41:45,714 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:41:45,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45 WrapperNode [2021-02-22 01:41:45,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:41:45,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:41:45,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:41:45,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:41:45,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (1/1) ... [2021-02-22 01:41:45,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:41:45,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:41:45,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:41:45,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:41:45,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (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 [2021-02-22 01:41:45,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:41:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:41:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:41:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-22 01:41:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-22 01:41:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:41:45,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:41:45,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:41:45,917 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-22 01:41:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-22 01:41:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:41:45,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:41:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:41:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:41:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:41:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:41:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:41:46,267 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:41:46,268 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:41:46,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:41:46 BoogieIcfgContainer [2021-02-22 01:41:46,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:41:46,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:41:46,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:41:46,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:41:46,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:41:45" (1/3) ... [2021-02-22 01:41:46,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3bac36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:41:46, skipping insertion in model container [2021-02-22 01:41:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:41:45" (2/3) ... [2021-02-22 01:41:46,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3bac36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:41:46, skipping insertion in model container [2021-02-22 01:41:46,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:41:46" (3/3) ... [2021-02-22 01:41:46,286 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2021-02-22 01:41:46,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:41:46,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:41:46,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:41:46,383 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:41:46,384 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:41:46,384 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:41:46,384 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:41:46,385 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:41:46,385 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:41:46,385 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:41:46,385 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:41:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-22 01:41:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 01:41:46,422 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:46,424 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] [2021-02-22 01:41:46,424 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-22 01:41:46,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:46,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741863664] [2021-02-22 01:41:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:46,598 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:46,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:46,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:46,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:46,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:47,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:47,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:47,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:47,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:47,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:47,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:47,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:47,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:47,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:47,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:41:47,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741863664] [2021-02-22 01:41:47,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:47,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 01:41:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241849344] [2021-02-22 01:41:47,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 01:41:47,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:47,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 01:41:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 01:41:47,147 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-22 01:41:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:47,849 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-02-22 01:41:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 01:41:47,852 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-22 01:41:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:47,868 INFO L225 Difference]: With dead ends: 67 [2021-02-22 01:41:47,869 INFO L226 Difference]: Without dead ends: 50 [2021-02-22 01:41:47,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:41:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-22 01:41:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-22 01:41:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 01:41:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-22 01:41:47,972 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-22 01:41:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:47,973 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-22 01:41:47,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 01:41:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-22 01:41:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 01:41:47,977 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:47,977 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] [2021-02-22 01:41:47,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:41:47,979 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-22 01:41:47,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:47,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081976214] [2021-02-22 01:41:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:47,986 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:48,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:48,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:41:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081976214] [2021-02-22 01:41:48,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 01:41:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849349640] [2021-02-22 01:41:48,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 01:41:48,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 01:41:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 01:41:48,260 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-22 01:41:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:48,637 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-22 01:41:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 01:41:48,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-22 01:41:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:48,641 INFO L225 Difference]: With dead ends: 58 [2021-02-22 01:41:48,642 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 01:41:48,644 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 [2021-02-22 01:41:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 01:41:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-22 01:41:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 01:41:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-22 01:41:48,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-22 01:41:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:48,667 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-22 01:41:48,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 01:41:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-22 01:41:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-22 01:41:48,670 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:48,670 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] [2021-02-22 01:41:48,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:41:48,671 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-22 01:41:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:48,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694464183] [2021-02-22 01:41:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:48,677 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:48,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,932 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 01:41:48,935 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 01:41:48,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:41:48,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:48,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:48,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:48,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:49,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-22 01:41:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:41:49,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694464183] [2021-02-22 01:41:49,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:41:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802498206] [2021-02-22 01:41:49,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:41:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:49,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:41:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:41:49,021 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 8 states. [2021-02-22 01:41:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:49,477 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-22 01:41:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 01:41:49,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-02-22 01:41:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:49,488 INFO L225 Difference]: With dead ends: 90 [2021-02-22 01:41:49,489 INFO L226 Difference]: Without dead ends: 54 [2021-02-22 01:41:49,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-22 01:41:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-22 01:41:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-22 01:41:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-22 01:41:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-22 01:41:49,532 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-22 01:41:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:49,533 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-22 01:41:49,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:41:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-22 01:41:49,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-22 01:41:49,535 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:49,536 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] [2021-02-22 01:41:49,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:41:49,536 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-22 01:41:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655692092] [2021-02-22 01:41:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:49,543 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:49,600 WARN L141 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-02-22 01:41:49,601 WARN L147 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size 7 [2021-02-22 01:41:49,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:49,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-22 01:41:49,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:41:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:49,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:49,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:49,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-22 01:41:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655692092] [2021-02-22 01:41:49,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:49,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:41:49,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782755938] [2021-02-22 01:41:49,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:41:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:49,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:41:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:41:49,898 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2021-02-22 01:41:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:50,720 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2021-02-22 01:41:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 01:41:50,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2021-02-22 01:41:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:50,723 INFO L225 Difference]: With dead ends: 74 [2021-02-22 01:41:50,723 INFO L226 Difference]: Without dead ends: 68 [2021-02-22 01:41:50,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:41:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-22 01:41:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-02-22 01:41:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-22 01:41:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-02-22 01:41:50,749 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 42 [2021-02-22 01:41:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:50,749 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-02-22 01:41:50,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:41:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-02-22 01:41:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-22 01:41:50,751 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:50,752 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] [2021-02-22 01:41:50,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:41:50,753 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 272544205, now seen corresponding path program 1 times [2021-02-22 01:41:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:50,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950811942] [2021-02-22 01:41:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:50,775 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:50,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:50,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:50,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:50,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:50,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:50,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:50,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:50,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:50,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:50,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:50,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:41:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:51,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:51,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-22 01:41:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950811942] [2021-02-22 01:41:51,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:51,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:41:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131014034] [2021-02-22 01:41:51,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:41:51,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:41:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:41:51,048 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 9 states. [2021-02-22 01:41:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:51,607 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2021-02-22 01:41:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:41:51,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-02-22 01:41:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:51,614 INFO L225 Difference]: With dead ends: 109 [2021-02-22 01:41:51,614 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 01:41:51,616 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 [2021-02-22 01:41:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 01:41:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-22 01:41:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-22 01:41:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-02-22 01:41:51,647 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 43 [2021-02-22 01:41:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:51,648 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-02-22 01:41:51,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:41:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-02-22 01:41:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-22 01:41:51,651 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:51,652 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] [2021-02-22 01:41:51,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:41:51,652 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-22 01:41:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:51,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426922419] [2021-02-22 01:41:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:51,657 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:51,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,791 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 01:41:51,793 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 01:41:51,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:41:51,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:51,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:51,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-22 01:41:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-22 01:41:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:51,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:51,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-22 01:41:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426922419] [2021-02-22 01:41:51,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:51,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:41:51,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251031952] [2021-02-22 01:41:51,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:41:51,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:51,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:41:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:41:51,880 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2021-02-22 01:41:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:52,339 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-02-22 01:41:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 01:41:52,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2021-02-22 01:41:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:52,342 INFO L225 Difference]: With dead ends: 112 [2021-02-22 01:41:52,342 INFO L226 Difference]: Without dead ends: 64 [2021-02-22 01:41:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-22 01:41:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-22 01:41:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-22 01:41:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-22 01:41:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-02-22 01:41:52,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 58 [2021-02-22 01:41:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:52,372 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-02-22 01:41:52,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:41:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-02-22 01:41:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-22 01:41:52,376 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:52,376 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] [2021-02-22 01:41:52,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:41:52,377 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-22 01:41:52,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:52,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427754080] [2021-02-22 01:41:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:52,383 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,574 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:41:52,576 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:41:52,588 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:41:52,592 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:41:52,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:41:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:41:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:52,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:52,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-22 01:41:52,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427754080] [2021-02-22 01:41:52,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:52,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:41:52,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989994957] [2021-02-22 01:41:52,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:41:52,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:41:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:41:52,728 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 10 states. [2021-02-22 01:41:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:53,261 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-02-22 01:41:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 01:41:53,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-02-22 01:41:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:53,265 INFO L225 Difference]: With dead ends: 114 [2021-02-22 01:41:53,265 INFO L226 Difference]: Without dead ends: 64 [2021-02-22 01:41:53,267 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 [2021-02-22 01:41:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-22 01:41:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-22 01:41:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-22 01:41:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-02-22 01:41:53,290 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 59 [2021-02-22 01:41:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:53,291 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-02-22 01:41:53,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:41:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-02-22 01:41:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-22 01:41:53,295 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:41:53,295 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] [2021-02-22 01:41:53,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:41:53,296 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:41:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:41:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-22 01:41:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:41:53,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91676892] [2021-02-22 01:41:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:41:53,300 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:41:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:53,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:41:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:41:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:53,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:41:53,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:53,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:53,454 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:41:53,456 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:41:53,469 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:41:53,474 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:41:53,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:41:53,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:41:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:41:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:41:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:41:53,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:41:53,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:41:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-22 01:41:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91676892] [2021-02-22 01:41:53,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:41:53,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 01:41:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401930929] [2021-02-22 01:41:53,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 01:41:53,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:41:53,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 01:41:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:41:53,549 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2021-02-22 01:41:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:41:54,007 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-02-22 01:41:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 01:41:54,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-22 01:41:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:41:54,011 INFO L225 Difference]: With dead ends: 64 [2021-02-22 01:41:54,011 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 01:41:54,013 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 [2021-02-22 01:41:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 01:41:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 01:41:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 01:41:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 01:41:54,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2021-02-22 01:41:54,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:41:54,015 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 01:41:54,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 01:41:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 01:41:54,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 01:41:54,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:41:54,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 01:41:55,236 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 20 [2021-02-22 01:41:55,583 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2021-02-22 01:41:55,949 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-22 01:41:56,356 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2021-02-22 01:41:56,651 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-22 01:41:56,651 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-22 01:41:56,652 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-22 01:41:56,652 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,652 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,653 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,653 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,653 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,653 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|)) [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,654 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,655 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,655 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 01:41:56,655 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) the Hoare annotation is: false [2021-02-22 01:41:56,655 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2021-02-22 01:41:56,656 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-22 01:41:56,656 INFO L185 CegarLoopUtils]: At program point mainFINAL(lines 37 44) the Hoare annotation is: (= main_~x~0 2) [2021-02-22 01:41:56,656 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: false [2021-02-22 01:41:56,656 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)) [2021-02-22 01:41:56,656 INFO L185 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: false [2021-02-22 01:41:56,656 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (= main_~x~0 2) [2021-02-22 01:41:56,657 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)) [2021-02-22 01:41:56,657 INFO L185 CegarLoopUtils]: At program point L40-2(lines 40 42) the Hoare annotation is: (= main_~x~0 2) [2021-02-22 01:41:56,657 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)) [2021-02-22 01:41:56,657 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)) [2021-02-22 01:41:56,657 INFO L192 CegarLoopUtils]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2021-02-22 01:41:56,657 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,657 INFO L185 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,658 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)) [2021-02-22 01:41:56,658 INFO L185 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,658 INFO L185 CegarLoopUtils]: At program point L22(lines 22 26) the Hoare annotation is: (and (<= 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2021-02-22 01:41:56,658 INFO L185 CegarLoopUtils]: At program point L25-3(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,658 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| 0)) [2021-02-22 01:41:56,658 INFO L185 CegarLoopUtils]: At program point L25-4(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,659 INFO L185 CegarLoopUtils]: At program point L20(lines 20 26) the Hoare annotation is: (= fibo2_~n |fibo2_#in~n|) [2021-02-22 01:41:56,659 INFO L185 CegarLoopUtils]: At program point L25-5(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,659 INFO L185 CegarLoopUtils]: At program point L25-6(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2021-02-22 01:41:56,659 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|)))) [2021-02-22 01:41:56,659 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|)))) [2021-02-22 01:41:56,660 INFO L192 CegarLoopUtils]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2021-02-22 01:41:56,660 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2021-02-22 01:41:56,660 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))) [2021-02-22 01:41:56,660 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|)) [2021-02-22 01:41:56,660 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))) [2021-02-22 01:41:56,660 INFO L185 CegarLoopUtils]: At program point L12(lines 12 16) the Hoare annotation is: (and (= fibo1_~n |fibo1_#in~n|) (< 0 fibo1_~n)) [2021-02-22 01:41:56,661 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))) [2021-02-22 01:41:56,661 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (and (<= |fibo1_#in~n| 0) (= fibo1_~n |fibo1_#in~n|)) [2021-02-22 01:41:56,661 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))) [2021-02-22 01:41:56,661 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))) [2021-02-22 01:41:56,661 INFO L185 CegarLoopUtils]: At program point L10(lines 10 16) the Hoare annotation is: (= fibo1_~n |fibo1_#in~n|) [2021-02-22 01:41:56,662 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|))))) [2021-02-22 01:41:56,662 INFO L185 CegarLoopUtils]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0 (<= |fibo1_#res| 1) (<= 1 |fibo1_#res|)))) [2021-02-22 01:41:56,662 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))) [2021-02-22 01:41:56,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:41:56 BoogieIcfgContainer [2021-02-22 01:41:56,693 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:41:56,695 INFO L168 Benchmark]: Toolchain (without parser) took 11480.07 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 132.1 MB in the beginning and 195.4 MB in the end (delta: -63.2 MB). Peak memory consumption was 159.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:41:56,696 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 156.2 MB. Free memory was 127.4 MB in the beginning and 127.2 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:41:56,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 479.29 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:41:56,697 INFO L168 Benchmark]: Boogie Preprocessor took 50.80 ms. Allocated memory is still 156.2 MB. Free memory was 121.7 MB in the beginning and 120.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:41:56,698 INFO L168 Benchmark]: RCFGBuilder took 502.15 ms. Allocated memory is still 156.2 MB. Free memory was 120.5 MB in the beginning and 103.9 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 01:41:56,698 INFO L168 Benchmark]: TraceAbstraction took 10418.96 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 103.3 MB in the beginning and 195.4 MB in the end (delta: -92.1 MB). Peak memory consumption was 130.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:41:56,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 156.2 MB. Free memory was 127.4 MB in the beginning and 127.2 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 479.29 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.80 ms. Allocated memory is still 156.2 MB. Free memory was 121.7 MB in the beginning and 120.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 502.15 ms. Allocated memory is still 156.2 MB. Free memory was 120.5 MB in the beginning and 103.9 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10418.96 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 103.3 MB in the beginning and 195.4 MB in the end (delta: -92.1 MB). Peak memory consumption was 130.1 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: 7.6s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 511 SDslu, 604 SDs, 0 SdLazy, 1490 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 54 LocationsWithAnnotation, 376 PreInvPairs, 526 NumberOfFragments, 506 HoareAnnotationTreeSize, 376 FomulaSimplifications, 12327 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 54 FomulaSimplificationsInter, 3400 FormulaSimplificationTreeSizeReductionInter, 1.7s 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...