/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/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:29:40,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:29:40,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:29:40,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:29:40,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:29:40,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:29:40,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:29:40,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:29:40,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:29:40,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:29:40,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:29:40,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:29:40,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:29:40,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:29:40,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:29:40,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:29:40,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:29:40,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:29:40,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:29:40,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:29:40,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:29:40,460 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:29:40,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:29:40,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:29:40,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:29:40,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:29:40,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:29:40,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:29:40,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:29:40,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:29:40,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:29:40,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:29:40,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:29:40,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:29:40,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:29:40,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:29:40,471 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:29:40,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:29:40,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:29:40,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:29:40,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:29:40,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:29:40,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:29:40,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:29:40,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:29:40,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:29:40,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:29:40,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:29:40,970 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:29:40,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2021-02-21 20:29:41,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20db3d15f/c2e5e9426ce54830b9ac0b4d639f0d47/FLAG67cf2f288 [2021-02-21 20:29:41,889 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:29:41,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2021-02-21 20:29:41,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20db3d15f/c2e5e9426ce54830b9ac0b4d639f0d47/FLAG67cf2f288 [2021-02-21 20:29:42,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20db3d15f/c2e5e9426ce54830b9ac0b4d639f0d47 [2021-02-21 20:29:42,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:29:42,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:29:42,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:42,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:29:42,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:29:42,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b13b8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42, skipping insertion in model container [2021-02-21 20:29:42,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:29:42,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:29:42,525 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/sum_15x0-2.c[481,494] [2021-02-21 20:29:42,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:42,545 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:29:42,570 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/sum_15x0-2.c[481,494] [2021-02-21 20:29:42,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:42,593 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:29:42,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42 WrapperNode [2021-02-21 20:29:42,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:42,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:29:42,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:29:42,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:29:42,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (1/1) ... [2021-02-21 20:29:42,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:29:42,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:29:42,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:29:42,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:29:42,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (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 [2021-02-21 20:29:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:29:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:29:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:29:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-21 20:29:42,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:29:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:29:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-21 20:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:29:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:29:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:29:42,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:29:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:29:42,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:29:43,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:29:43,077 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:29:43,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:43 BoogieIcfgContainer [2021-02-21 20:29:43,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:29:43,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:29:43,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:29:43,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:29:43,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:29:42" (1/3) ... [2021-02-21 20:29:43,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b76635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:43, skipping insertion in model container [2021-02-21 20:29:43,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:42" (2/3) ... [2021-02-21 20:29:43,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b76635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:43, skipping insertion in model container [2021-02-21 20:29:43,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:43" (3/3) ... [2021-02-21 20:29:43,090 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2021-02-21 20:29:43,098 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:29:43,104 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:29:43,129 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:29:43,184 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:29:43,185 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:29:43,187 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:29:43,188 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:29:43,188 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:29:43,188 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:29:43,188 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:29:43,188 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:29:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-21 20:29:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 20:29:43,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:43,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:43,262 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:43,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-21 20:29:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:43,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014290322] [2021-02-21 20:29:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:43,451 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:43,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:43,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:43,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:43,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:43,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:43,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:43,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:43,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:43,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:29:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014290322] [2021-02-21 20:29:43,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:43,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:29:43,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16188955] [2021-02-21 20:29:43,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:29:44,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:29:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:29:44,023 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-21 20:29:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:44,345 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-21 20:29:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:29:44,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-21 20:29:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:44,357 INFO L225 Difference]: With dead ends: 48 [2021-02-21 20:29:44,358 INFO L226 Difference]: Without dead ends: 33 [2021-02-21 20:29:44,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:29:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-21 20:29:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-21 20:29:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-21 20:29:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-21 20:29:44,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-21 20:29:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:44,419 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-21 20:29:44,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:29:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-21 20:29:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 20:29:44,422 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:44,422 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:29:44,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:29:44,423 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-21 20:29:44,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:44,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613570636] [2021-02-21 20:29:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:44,428 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:44,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:44,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:44,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:44,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:44,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:44,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:44,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:44,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:44,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:44,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:44,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-21 20:29:44,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613570636] [2021-02-21 20:29:44,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:29:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700524611] [2021-02-21 20:29:44,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:29:44,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:29:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:29:44,730 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-21 20:29:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:45,031 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-21 20:29:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:29:45,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-21 20:29:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:45,034 INFO L225 Difference]: With dead ends: 44 [2021-02-21 20:29:45,034 INFO L226 Difference]: Without dead ends: 38 [2021-02-21 20:29:45,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:29:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-21 20:29:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-21 20:29:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 20:29:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-21 20:29:45,053 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-21 20:29:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:45,053 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-21 20:29:45,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:29:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-21 20:29:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 20:29:45,055 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:45,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-21 20:29:45,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:29:45,056 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-21 20:29:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:45,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260415617] [2021-02-21 20:29:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:45,061 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:45,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-21 20:29:45,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260415617] [2021-02-21 20:29:45,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:45,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:29:45,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038416839] [2021-02-21 20:29:45,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:29:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:45,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:29:45,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:29:45,379 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2021-02-21 20:29:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:45,718 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-21 20:29:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:29:45,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-02-21 20:29:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:45,720 INFO L225 Difference]: With dead ends: 49 [2021-02-21 20:29:45,720 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 20:29:45,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:29:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 20:29:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-21 20:29:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 20:29:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-21 20:29:45,735 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-21 20:29:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:45,736 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-21 20:29:45,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:29:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-21 20:29:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 20:29:45,738 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:45,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:45,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:29:45,739 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-21 20:29:45,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:45,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755974166] [2021-02-21 20:29:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:45,743 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:45,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:45,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:45,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:45,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-21 20:29:45,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755974166] [2021-02-21 20:29:45,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:45,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:29:45,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348769738] [2021-02-21 20:29:45,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:29:45,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:29:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:29:45,985 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2021-02-21 20:29:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:46,393 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-02-21 20:29:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:29:46,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-02-21 20:29:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:46,396 INFO L225 Difference]: With dead ends: 54 [2021-02-21 20:29:46,396 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 20:29:46,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:29:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 20:29:46,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-21 20:29:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 20:29:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-21 20:29:46,413 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 53 [2021-02-21 20:29:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:46,413 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-21 20:29:46,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:29:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-21 20:29:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 20:29:46,415 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:46,415 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:46,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:29:46,416 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 54098690, now seen corresponding path program 4 times [2021-02-21 20:29:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:46,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867072785] [2021-02-21 20:29:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:46,420 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:46,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:46,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:46,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:46,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:46,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:46,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-02-21 20:29:46,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867072785] [2021-02-21 20:29:46,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:46,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:29:46,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567684717] [2021-02-21 20:29:46,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:29:46,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:29:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:29:46,748 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2021-02-21 20:29:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:47,219 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-21 20:29:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:29:47,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2021-02-21 20:29:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:47,222 INFO L225 Difference]: With dead ends: 59 [2021-02-21 20:29:47,222 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 20:29:47,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:29:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 20:29:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-21 20:29:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 20:29:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-21 20:29:47,240 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 62 [2021-02-21 20:29:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:47,240 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-21 20:29:47,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:29:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-21 20:29:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-21 20:29:47,243 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:47,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:47,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:29:47,243 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -406982872, now seen corresponding path program 5 times [2021-02-21 20:29:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:47,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149681935] [2021-02-21 20:29:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:47,248 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:47,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:47,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:47,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:47,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:47,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-02-21 20:29:47,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149681935] [2021-02-21 20:29:47,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:47,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:29:47,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006313936] [2021-02-21 20:29:47,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:29:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:47,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:29:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:29:47,619 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2021-02-21 20:29:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:48,149 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-21 20:29:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:29:48,150 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-02-21 20:29:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:48,163 INFO L225 Difference]: With dead ends: 64 [2021-02-21 20:29:48,164 INFO L226 Difference]: Without dead ends: 58 [2021-02-21 20:29:48,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:29:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-21 20:29:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-21 20:29:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 20:29:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-21 20:29:48,200 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 71 [2021-02-21 20:29:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:48,203 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-21 20:29:48,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:29:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-21 20:29:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 20:29:48,212 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:48,212 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:48,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:29:48,213 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 507179274, now seen corresponding path program 6 times [2021-02-21 20:29:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:48,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818544982] [2021-02-21 20:29:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:48,224 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:48,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:48,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:48,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:48,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:48,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:48,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-02-21 20:29:48,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818544982] [2021-02-21 20:29:48,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:48,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:29:48,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29470201] [2021-02-21 20:29:48,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:29:48,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:29:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:29:48,591 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2021-02-21 20:29:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:49,178 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-02-21 20:29:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:29:49,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-21 20:29:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:49,180 INFO L225 Difference]: With dead ends: 69 [2021-02-21 20:29:49,180 INFO L226 Difference]: Without dead ends: 63 [2021-02-21 20:29:49,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-02-21 20:29:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-21 20:29:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-21 20:29:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 20:29:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-21 20:29:49,200 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2021-02-21 20:29:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:49,201 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-21 20:29:49,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:29:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-21 20:29:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-21 20:29:49,203 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:49,203 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:49,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:29:49,204 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash -326332640, now seen corresponding path program 7 times [2021-02-21 20:29:49,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:49,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792566284] [2021-02-21 20:29:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:49,208 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:49,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:49,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:49,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:49,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-02-21 20:29:49,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792566284] [2021-02-21 20:29:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:49,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:29:49,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329097614] [2021-02-21 20:29:49,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:29:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:29:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:29:49,694 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2021-02-21 20:29:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:50,274 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-02-21 20:29:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:29:50,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-02-21 20:29:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:50,277 INFO L225 Difference]: With dead ends: 74 [2021-02-21 20:29:50,277 INFO L226 Difference]: Without dead ends: 68 [2021-02-21 20:29:50,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-02-21 20:29:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-21 20:29:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-02-21 20:29:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 20:29:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-02-21 20:29:50,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 89 [2021-02-21 20:29:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:50,300 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-02-21 20:29:50,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:29:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-02-21 20:29:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-21 20:29:50,301 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:50,302 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:50,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:29:50,302 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1949113106, now seen corresponding path program 8 times [2021-02-21 20:29:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:50,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748306511] [2021-02-21 20:29:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:50,307 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:50,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:50,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:50,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:50,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:50,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:50,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-02-21 20:29:50,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748306511] [2021-02-21 20:29:50,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:50,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 20:29:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870770062] [2021-02-21 20:29:50,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 20:29:50,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 20:29:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:29:50,793 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2021-02-21 20:29:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:51,435 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-02-21 20:29:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 20:29:51,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-02-21 20:29:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:51,437 INFO L225 Difference]: With dead ends: 79 [2021-02-21 20:29:51,438 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 20:29:51,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-02-21 20:29:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 20:29:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-21 20:29:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-21 20:29:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-02-21 20:29:51,457 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 98 [2021-02-21 20:29:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:51,457 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-02-21 20:29:51,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 20:29:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-02-21 20:29:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-21 20:29:51,459 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:51,459 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:51,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:29:51,460 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1213774616, now seen corresponding path program 9 times [2021-02-21 20:29:51,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:51,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145220753] [2021-02-21 20:29:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:51,464 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:51,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:51,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:51,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:51,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:51,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:51,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-02-21 20:29:52,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145220753] [2021-02-21 20:29:52,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:52,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 20:29:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10051791] [2021-02-21 20:29:52,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 20:29:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 20:29:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:29:52,048 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2021-02-21 20:29:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:52,736 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-02-21 20:29:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:29:52,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2021-02-21 20:29:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:52,739 INFO L225 Difference]: With dead ends: 84 [2021-02-21 20:29:52,739 INFO L226 Difference]: Without dead ends: 78 [2021-02-21 20:29:52,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-02-21 20:29:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-21 20:29:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-21 20:29:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 20:29:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-02-21 20:29:52,767 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 107 [2021-02-21 20:29:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:52,768 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-02-21 20:29:52,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 20:29:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-02-21 20:29:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-21 20:29:52,769 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:52,769 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:52,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:29:52,770 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash -241993446, now seen corresponding path program 10 times [2021-02-21 20:29:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:52,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105812274] [2021-02-21 20:29:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:52,780 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:52,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:52,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:52,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:52,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:52,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:52,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:52,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:52,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:52,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:53,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:53,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:53,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-02-21 20:29:53,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105812274] [2021-02-21 20:29:53,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:53,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:29:53,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849090509] [2021-02-21 20:29:53,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:29:53,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:29:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:29:53,451 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2021-02-21 20:29:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:54,218 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-02-21 20:29:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 20:29:54,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2021-02-21 20:29:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:54,221 INFO L225 Difference]: With dead ends: 89 [2021-02-21 20:29:54,221 INFO L226 Difference]: Without dead ends: 83 [2021-02-21 20:29:54,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-02-21 20:29:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-21 20:29:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-02-21 20:29:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-02-21 20:29:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-02-21 20:29:54,256 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 116 [2021-02-21 20:29:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:54,257 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-02-21 20:29:54,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:29:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-02-21 20:29:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-02-21 20:29:54,259 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:54,259 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:54,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 20:29:54,259 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash -790695152, now seen corresponding path program 11 times [2021-02-21 20:29:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:54,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383442989] [2021-02-21 20:29:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:54,264 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:54,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:54,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:54,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:54,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:54,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-02-21 20:29:54,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383442989] [2021-02-21 20:29:54,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:54,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 20:29:54,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055294609] [2021-02-21 20:29:54,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 20:29:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 20:29:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:29:54,995 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2021-02-21 20:29:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:55,813 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-02-21 20:29:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 20:29:55,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 125 [2021-02-21 20:29:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:55,815 INFO L225 Difference]: With dead ends: 94 [2021-02-21 20:29:55,816 INFO L226 Difference]: Without dead ends: 88 [2021-02-21 20:29:55,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2021-02-21 20:29:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-21 20:29:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-02-21 20:29:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-21 20:29:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-02-21 20:29:55,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 125 [2021-02-21 20:29:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:55,838 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-02-21 20:29:55,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 20:29:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-02-21 20:29:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-02-21 20:29:55,840 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:55,841 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:55,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 20:29:55,841 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash -126776542, now seen corresponding path program 12 times [2021-02-21 20:29:55,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:55,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696798320] [2021-02-21 20:29:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:55,847 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:55,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:55,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:55,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:55,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:55,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:55,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:55,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:55,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:55,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:55,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:56,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:56,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:56,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-02-21 20:29:56,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696798320] [2021-02-21 20:29:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 20:29:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202453518] [2021-02-21 20:29:56,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 20:29:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 20:29:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:29:56,711 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2021-02-21 20:29:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:57,542 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2021-02-21 20:29:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 20:29:57,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2021-02-21 20:29:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:57,544 INFO L225 Difference]: With dead ends: 99 [2021-02-21 20:29:57,544 INFO L226 Difference]: Without dead ends: 93 [2021-02-21 20:29:57,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2021-02-21 20:29:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-21 20:29:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-02-21 20:29:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-02-21 20:29:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-02-21 20:29:57,564 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 134 [2021-02-21 20:29:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:57,564 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-02-21 20:29:57,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 20:29:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-02-21 20:29:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-02-21 20:29:57,569 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:57,569 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:57,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 20:29:57,569 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1918613256, now seen corresponding path program 13 times [2021-02-21 20:29:57,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:57,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139601212] [2021-02-21 20:29:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:57,576 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:57,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:57,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:57,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:57,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:57,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:57,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:58,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:58,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:58,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-02-21 20:29:58,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139601212] [2021-02-21 20:29:58,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:58,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 20:29:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645713009] [2021-02-21 20:29:58,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 20:29:58,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 20:29:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:29:58,478 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2021-02-21 20:29:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:59,344 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-02-21 20:29:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:29:59,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2021-02-21 20:29:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:59,347 INFO L225 Difference]: With dead ends: 104 [2021-02-21 20:29:59,347 INFO L226 Difference]: Without dead ends: 98 [2021-02-21 20:29:59,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-02-21 20:29:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-21 20:29:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-02-21 20:29:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-02-21 20:29:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-02-21 20:29:59,363 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 143 [2021-02-21 20:29:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:59,364 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-02-21 20:29:59,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 20:29:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-02-21 20:29:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-02-21 20:29:59,366 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:59,366 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:29:59,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 20:29:59,367 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1212862762, now seen corresponding path program 14 times [2021-02-21 20:29:59,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:59,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760569800] [2021-02-21 20:29:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:59,370 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:59,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:59,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:59,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:59,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:59,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:00,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:00,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:00,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:00,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:00,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:00,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-02-21 20:30:00,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760569800] [2021-02-21 20:30:00,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:30:00,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-21 20:30:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241029495] [2021-02-21 20:30:00,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-21 20:30:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:30:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-21 20:30:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-02-21 20:30:00,470 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2021-02-21 20:30:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:30:01,479 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-02-21 20:30:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-21 20:30:01,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2021-02-21 20:30:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:30:01,482 INFO L225 Difference]: With dead ends: 109 [2021-02-21 20:30:01,482 INFO L226 Difference]: Without dead ends: 103 [2021-02-21 20:30:01,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-02-21 20:30:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-21 20:30:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-02-21 20:30:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-02-21 20:30:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-02-21 20:30:01,510 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 152 [2021-02-21 20:30:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:30:01,512 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-02-21 20:30:01,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-21 20:30:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-02-21 20:30:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-21 20:30:01,516 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:01,517 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:30:01,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 20:30:01,517 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:01,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1200326400, now seen corresponding path program 15 times [2021-02-21 20:30:01,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:01,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230981635] [2021-02-21 20:30:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:01,523 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:30:01,562 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:30:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:30:01,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:30:01,672 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:30:01,673 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:30:01,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 20:30:01,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:30:01 BoogieIcfgContainer [2021-02-21 20:30:01,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:30:01,714 INFO L168 Benchmark]: Toolchain (without parser) took 19455.44 ms. Allocated memory was 158.3 MB in the beginning and 421.5 MB in the end (delta: 263.2 MB). Free memory was 135.0 MB in the beginning and 226.6 MB in the end (delta: -91.6 MB). Peak memory consumption was 172.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:01,714 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 158.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:30:01,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.73 ms. Allocated memory is still 158.3 MB. Free memory was 133.9 MB in the beginning and 124.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:01,714 INFO L168 Benchmark]: Boogie Preprocessor took 57.12 ms. Allocated memory is still 158.3 MB. Free memory was 124.7 MB in the beginning and 123.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:01,715 INFO L168 Benchmark]: RCFGBuilder took 422.25 ms. Allocated memory is still 158.3 MB. Free memory was 123.5 MB in the beginning and 141.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:01,715 INFO L168 Benchmark]: TraceAbstraction took 18631.23 ms. Allocated memory was 158.3 MB in the beginning and 421.5 MB in the end (delta: 263.2 MB). Free memory was 140.7 MB in the beginning and 226.6 MB in the end (delta: -85.8 MB). Peak memory consumption was 177.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:01,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 158.3 MB. Free memory is still 131.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 318.73 ms. Allocated memory is still 158.3 MB. Free memory was 133.9 MB in the beginning and 124.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.12 ms. Allocated memory is still 158.3 MB. Free memory was 124.7 MB in the beginning and 123.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.25 ms. Allocated memory is still 158.3 MB. Free memory was 123.5 MB in the beginning and 141.1 MB in the end (delta: -17.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18631.23 ms. Allocated memory was 158.3 MB in the beginning and 421.5 MB in the end (delta: 263.2 MB). Free memory was 140.7 MB in the beginning and 226.6 MB in the end (delta: -85.8 MB). Peak memory consumption was 177.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND TRUE n <= 0 [L7] return m + n; [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.4s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 393 SDtfs, 1319 SDslu, 883 SDs, 0 SdLazy, 1678 SolverSat, 384 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 600 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=15, 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, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...