/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:53:12,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:53:12,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:53:12,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:53:12,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:53:12,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:53:12,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:53:12,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:53:12,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:53:12,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:53:12,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:53:12,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:53:12,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:53:12,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:53:12,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:53:12,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:53:12,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:53:12,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:53:12,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:53:12,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:53:12,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:53:12,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:53:12,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:53:12,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:53:12,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:53:12,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:53:12,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:53:12,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:53:12,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:53:12,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:53:12,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:53:12,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:53:12,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:53:12,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:53:12,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:53:12,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:53:12,641 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:53:12,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:53:12,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:53:12,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:53:12,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:53:12,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:53:12,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:53:12,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:53:13,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:53:13,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:53:13,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:53:13,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:53:13,088 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:53:13,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-23 17:53:13,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f310ed564/f99eb37132e34a4fb2e6df61107f2633/FLAG77715ac48 [2021-02-23 17:53:13,819 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:53:13,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-23 17:53:13,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f310ed564/f99eb37132e34a4fb2e6df61107f2633/FLAG77715ac48 [2021-02-23 17:53:14,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f310ed564/f99eb37132e34a4fb2e6df61107f2633 [2021-02-23 17:53:14,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:53:14,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:53:14,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:53:14,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:53:14,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:53:14,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195c3177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14, skipping insertion in model container [2021-02-23 17:53:14,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:53:14,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:53:14,425 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_4-2.c[946,959] [2021-02-23 17:53:14,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:53:14,442 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:53:14,463 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_4-2.c[946,959] [2021-02-23 17:53:14,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:53:14,483 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:53:14,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14 WrapperNode [2021-02-23 17:53:14,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:53:14,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:53:14,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:53:14,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:53:14,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... [2021-02-23 17:53:14,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:53:14,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:53:14,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:53:14,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:53:14,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:53:14,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:53:14,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:53:14,648 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:53:14,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-23 17:53:14,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-23 17:53:14,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:53:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:53:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:53:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:53:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:53:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:53:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-23 17:53:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-23 17:53:14,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:53:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:53:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:53:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:53:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:53:14,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:53:14,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:53:15,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:53:15,171 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:53:15,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:15 BoogieIcfgContainer [2021-02-23 17:53:15,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:53:15,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:53:15,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:53:15,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:53:15,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:53:14" (1/3) ... [2021-02-23 17:53:15,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee46c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:15, skipping insertion in model container [2021-02-23 17:53:15,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:14" (2/3) ... [2021-02-23 17:53:15,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee46c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:15, skipping insertion in model container [2021-02-23 17:53:15,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:15" (3/3) ... [2021-02-23 17:53:15,201 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-02-23 17:53:15,211 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:53:15,216 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:53:15,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:53:15,281 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:53:15,281 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:53:15,282 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:53:15,282 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:53:15,282 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:53:15,282 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:53:15,282 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:53:15,283 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:53:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 17:53:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:53:15,328 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:15,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:15,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-23 17:53:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:15,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818990907] [2021-02-23 17:53:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:15,451 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:15,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:15,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:15,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:15,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:15,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:15,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:15,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:15,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:16,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:53:16,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818990907] [2021-02-23 17:53:16,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:16,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:53:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472393525] [2021-02-23 17:53:16,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:53:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:16,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:53:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:53:16,085 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-23 17:53:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:16,645 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-02-23 17:53:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:16,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 17:53:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:16,682 INFO L225 Difference]: With dead ends: 70 [2021-02-23 17:53:16,682 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 17:53:16,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 17:53:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-23 17:53:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:53:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:53:16,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-23 17:53:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:16,795 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:53:16,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:53:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:53:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 17:53:16,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:16,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:16,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:53:16,799 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-23 17:53:16,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:16,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723334285] [2021-02-23 17:53:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:16,819 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:16,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:16,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:16,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:16,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:16,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:16,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:16,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:16,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:53:17,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723334285] [2021-02-23 17:53:17,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:17,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:53:17,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761361265] [2021-02-23 17:53:17,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:53:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:53:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:53:17,067 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-23 17:53:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:17,459 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 17:53:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:17,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-23 17:53:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:17,463 INFO L225 Difference]: With dead ends: 58 [2021-02-23 17:53:17,463 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 17:53:17,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 17:53:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 17:53:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:53:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:53:17,491 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-23 17:53:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:17,492 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:53:17,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:53:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:53:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 17:53:17,495 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:17,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:17,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:53:17,496 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-23 17:53:17,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:17,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730862004] [2021-02-23 17:53:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:17,500 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,646 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:53:17,647 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:53:17,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:53:17,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:17,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:17,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:53:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:17,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:17,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:53:17,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730862004] [2021-02-23 17:53:17,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:17,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:53:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505687006] [2021-02-23 17:53:17,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:53:17,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:53:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:53:17,729 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2021-02-23 17:53:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:18,083 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-23 17:53:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:18,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-02-23 17:53:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:18,093 INFO L225 Difference]: With dead ends: 90 [2021-02-23 17:53:18,094 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 17:53:18,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 17:53:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-23 17:53:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 17:53:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 17:53:18,134 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-23 17:53:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:18,135 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 17:53:18,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:53:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 17:53:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:53:18,141 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:18,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:18,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:53:18,143 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-23 17:53:18,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:18,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590965791] [2021-02-23 17:53:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:18,151 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:18,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:18,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:18,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:18,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:18,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:18,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:18,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:18,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:18,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:18,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:18,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:18,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:18,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:53:18,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590965791] [2021-02-23 17:53:18,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:18,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:53:18,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545781563] [2021-02-23 17:53:18,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:53:18,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:18,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:53:18,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:53:18,435 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2021-02-23 17:53:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:18,945 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-02-23 17:53:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:53:18,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-23 17:53:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:18,948 INFO L225 Difference]: With dead ends: 82 [2021-02-23 17:53:18,948 INFO L226 Difference]: Without dead ends: 76 [2021-02-23 17:53:18,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:53:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-23 17:53:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-23 17:53:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 17:53:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-02-23 17:53:18,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 42 [2021-02-23 17:53:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:18,972 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-02-23 17:53:18,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:53:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-02-23 17:53:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 17:53:18,975 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:18,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:18,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:53:18,975 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:18,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-23 17:53:18,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:18,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120119535] [2021-02-23 17:53:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:18,979 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,074 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:53:19,075 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:53:19,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:53:19,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:53:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 17:53:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120119535] [2021-02-23 17:53:19,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:19,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:53:19,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339218179] [2021-02-23 17:53:19,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:53:19,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:53:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:53:19,134 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 7 states. [2021-02-23 17:53:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:19,471 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2021-02-23 17:53:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:19,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-23 17:53:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:19,474 INFO L225 Difference]: With dead ends: 138 [2021-02-23 17:53:19,474 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 17:53:19,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 17:53:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-23 17:53:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 17:53:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-02-23 17:53:19,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 58 [2021-02-23 17:53:19,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:19,500 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-02-23 17:53:19,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:53:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-02-23 17:53:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 17:53:19,502 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:19,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:19,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:53:19,503 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-23 17:53:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:19,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928310086] [2021-02-23 17:53:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:19,507 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,606 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:19,607 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:19,617 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:19,617 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:19,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:19,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:19,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:19,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-23 17:53:19,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928310086] [2021-02-23 17:53:19,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:19,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:53:19,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318008815] [2021-02-23 17:53:19,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:53:19,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:53:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:53:19,697 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 9 states. [2021-02-23 17:53:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:20,134 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2021-02-23 17:53:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:53:20,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2021-02-23 17:53:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:20,137 INFO L225 Difference]: With dead ends: 150 [2021-02-23 17:53:20,138 INFO L226 Difference]: Without dead ends: 86 [2021-02-23 17:53:20,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:53:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-23 17:53:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-02-23 17:53:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-23 17:53:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-02-23 17:53:20,165 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 59 [2021-02-23 17:53:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:20,166 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-02-23 17:53:20,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:53:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-02-23 17:53:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 17:53:20,167 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:20,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:20,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:53:20,168 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-23 17:53:20,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336935256] [2021-02-23 17:53:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:20,171 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:20,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:20,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:20,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:20,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:20,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:20,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:20,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:20,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336935256] [2021-02-23 17:53:20,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:20,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:53:20,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420644671] [2021-02-23 17:53:20,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:53:20,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:20,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:53:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:20,368 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 11 states. [2021-02-23 17:53:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:21,086 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2021-02-23 17:53:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:53:21,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-23 17:53:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:21,090 INFO L225 Difference]: With dead ends: 126 [2021-02-23 17:53:21,090 INFO L226 Difference]: Without dead ends: 120 [2021-02-23 17:53:21,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:53:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-23 17:53:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-02-23 17:53:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-23 17:53:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2021-02-23 17:53:21,129 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 60 [2021-02-23 17:53:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:21,130 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2021-02-23 17:53:21,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:53:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2021-02-23 17:53:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 17:53:21,132 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:21,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:21,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:53:21,133 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:21,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1046643654, now seen corresponding path program 1 times [2021-02-23 17:53:21,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:21,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341130861] [2021-02-23 17:53:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:21,137 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,259 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:21,260 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:21,270 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:21,272 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:21,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:21,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-23 17:53:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-23 17:53:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341130861] [2021-02-23 17:53:21,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:21,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:53:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463407092] [2021-02-23 17:53:21,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:53:21,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:53:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:21,352 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand 10 states. [2021-02-23 17:53:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:21,926 INFO L93 Difference]: Finished difference Result 235 states and 356 transitions. [2021-02-23 17:53:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:53:21,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2021-02-23 17:53:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:21,929 INFO L225 Difference]: With dead ends: 235 [2021-02-23 17:53:21,930 INFO L226 Difference]: Without dead ends: 135 [2021-02-23 17:53:21,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:53:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-23 17:53:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-02-23 17:53:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-23 17:53:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-02-23 17:53:21,967 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 77 [2021-02-23 17:53:21,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:21,968 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-02-23 17:53:21,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:53:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-02-23 17:53:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-02-23 17:53:21,970 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:21,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:21,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:53:21,970 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 549553181, now seen corresponding path program 1 times [2021-02-23 17:53:21,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:21,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766844874] [2021-02-23 17:53:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:21,974 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:21,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:21,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:22,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,134 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:22,135 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:22,149 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:22,152 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:22,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:22,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:22,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:22,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:22,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766844874] [2021-02-23 17:53:22,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:22,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:53:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57337669] [2021-02-23 17:53:22,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:53:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:53:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:53:22,237 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 13 states. [2021-02-23 17:53:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:22,987 INFO L93 Difference]: Finished difference Result 265 states and 408 transitions. [2021-02-23 17:53:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:53:22,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2021-02-23 17:53:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:22,991 INFO L225 Difference]: With dead ends: 265 [2021-02-23 17:53:22,992 INFO L226 Difference]: Without dead ends: 159 [2021-02-23 17:53:22,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-23 17:53:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-23 17:53:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-02-23 17:53:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-23 17:53:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2021-02-23 17:53:23,034 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 78 [2021-02-23 17:53:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:23,035 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2021-02-23 17:53:23,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:53:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2021-02-23 17:53:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-23 17:53:23,038 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:23,038 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:23,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:53:23,039 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1728392861, now seen corresponding path program 2 times [2021-02-23 17:53:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:23,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348588404] [2021-02-23 17:53:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:23,042 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:23,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:23,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:23,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,328 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:23,329 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:23,344 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:23,345 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:23,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:23,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:23,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:23,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 17:53:23,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348588404] [2021-02-23 17:53:23,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:23,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 17:53:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161759174] [2021-02-23 17:53:23,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 17:53:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 17:53:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:53:23,446 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand 17 states. [2021-02-23 17:53:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:24,692 INFO L93 Difference]: Finished difference Result 273 states and 428 transitions. [2021-02-23 17:53:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 17:53:24,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2021-02-23 17:53:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:24,697 INFO L225 Difference]: With dead ends: 273 [2021-02-23 17:53:24,698 INFO L226 Difference]: Without dead ends: 124 [2021-02-23 17:53:24,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 17:53:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-23 17:53:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-02-23 17:53:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-23 17:53:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-02-23 17:53:24,727 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 113 [2021-02-23 17:53:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:24,727 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-02-23 17:53:24,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 17:53:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-02-23 17:53:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 17:53:24,729 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:24,730 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:24,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:53:24,730 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash -645905939, now seen corresponding path program 1 times [2021-02-23 17:53:24,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:24,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59611911] [2021-02-23 17:53:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:24,733 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:53:24,748 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:53:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:53:24,763 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:53:24,807 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:53:24,807 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:53:24,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 17:53:24,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:53:24 BoogieIcfgContainer [2021-02-23 17:53:24,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:53:24,833 INFO L168 Benchmark]: Toolchain (without parser) took 10626.52 ms. Allocated memory was 172.0 MB in the beginning and 308.3 MB in the end (delta: 136.3 MB). Free memory was 149.0 MB in the beginning and 204.2 MB in the end (delta: -55.2 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:24,834 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 172.0 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:53:24,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.89 ms. Allocated memory is still 172.0 MB. Free memory was 148.0 MB in the beginning and 138.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:24,834 INFO L168 Benchmark]: Boogie Preprocessor took 44.11 ms. Allocated memory is still 172.0 MB. Free memory was 138.3 MB in the beginning and 137.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:24,835 INFO L168 Benchmark]: RCFGBuilder took 646.49 ms. Allocated memory is still 172.0 MB. Free memory was 137.1 MB in the beginning and 151.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:24,835 INFO L168 Benchmark]: TraceAbstraction took 9649.93 ms. Allocated memory was 172.0 MB in the beginning and 308.3 MB in the end (delta: 136.3 MB). Free memory was 151.3 MB in the beginning and 204.2 MB in the end (delta: -53.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:24,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 172.0 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.89 ms. Allocated memory is still 172.0 MB. Free memory was 148.0 MB in the beginning and 138.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.11 ms. Allocated memory is still 172.0 MB. Free memory was 138.3 MB in the beginning and 137.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 646.49 ms. Allocated memory is still 172.0 MB. Free memory was 137.1 MB in the beginning and 151.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9649.93 ms. Allocated memory was 172.0 MB in the beginning and 308.3 MB in the end (delta: 136.3 MB). Free memory was 151.3 MB in the beginning and 204.2 MB in the end (delta: -53.0 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND TRUE n < 1 [L11] return 0; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.5s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 496 SDtfs, 844 SDslu, 836 SDs, 0 SdLazy, 2444 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...