/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/eca-rers2012/Problem02_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:12:08,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:12:08,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:12:08,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:12:08,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:12:08,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:12:08,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:12:08,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:12:08,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:12:08,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:12:08,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:12:08,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:12:08,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:12:08,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:12:08,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:12:08,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:12:08,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:12:08,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:12:08,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:12:08,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:12:08,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:12:08,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:12:08,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:12:08,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:12:08,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 01:12:08,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 01:12:08,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 01:12:08,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 01:12:08,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 01:12:08,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 01:12:08,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:12:08,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:12:08,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:12:08,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:12:08,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:12:08,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:12:08,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:12:08,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:12:08,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:12:08,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:12:08,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:12:08,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:12:08,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:12:08,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:12:08,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:12:08,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:12:08,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:12:08,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:12:08,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:12:08,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:12:08,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:12:08,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:12:08,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:12:08,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:12:08,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:12:08,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:12:08,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:12:08,307 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:12:08,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:12:08,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:12:08,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:12:08,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:12:08,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:12:08,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:12:08,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:12:08,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:12:08,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:12:08,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:12:08,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:12:08,768 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:12:08,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2020-11-07 01:12:08,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efed19/f08f2fe5f40e4f4994e0c58085c81f43/FLAGe5d7cd758 [2020-11-07 01:12:09,721 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:12:09,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label09.c [2020-11-07 01:12:09,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efed19/f08f2fe5f40e4f4994e0c58085c81f43/FLAGe5d7cd758 [2020-11-07 01:12:10,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efed19/f08f2fe5f40e4f4994e0c58085c81f43 [2020-11-07 01:12:10,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:12:10,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:12:10,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:12:10,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:12:10,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:12:10,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec79b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10, skipping insertion in model container [2020-11-07 01:12:10,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:12:10,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:12:10,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:12:10,638 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:12:10,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:12:10,811 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:12:10,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10 WrapperNode [2020-11-07 01:12:10,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:12:10,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:12:10,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:12:10,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:12:10,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (1/1) ... [2020-11-07 01:12:10,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:12:10,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:12:10,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:12:10,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:12:10,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (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 [2020-11-07 01:12:11,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:12:11,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:12:11,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:12:11,091 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-11-07 01:12:11,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:12:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-11-07 01:12:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:12:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:12:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:12:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:12:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:12:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 01:12:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:12:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:12:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:12:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:12:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:12:11,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:12:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:12:12,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:12:12,560 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:12:12,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:12 BoogieIcfgContainer [2020-11-07 01:12:12,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:12:12,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:12:12,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:12:12,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:12:12,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:10" (1/3) ... [2020-11-07 01:12:12,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbe9c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:12, skipping insertion in model container [2020-11-07 01:12:12,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:10" (2/3) ... [2020-11-07 01:12:12,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbe9c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:12, skipping insertion in model container [2020-11-07 01:12:12,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:12" (3/3) ... [2020-11-07 01:12:12,578 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label09.c [2020-11-07 01:12:12,596 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:12:12,601 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:12:12,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:12:12,653 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:12:12,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:12:12,653 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:12:12,653 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:12:12,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:12:12,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:12:12,654 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:12:12,654 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:12:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states. [2020-11-07 01:12:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-11-07 01:12:12,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:12:12,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:12:12,748 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:12:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:12:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1544165084, now seen corresponding path program 1 times [2020-11-07 01:12:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:12:12,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586396115] [2020-11-07 01:12:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:12:12,858 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:12:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:13,478 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:12:13,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:12:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:12:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586396115] [2020-11-07 01:12:13,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:12:13,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:12:13,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204839977] [2020-11-07 01:12:13,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:12:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:12:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:12:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:12:13,616 INFO L87 Difference]: Start difference. First operand 539 states. Second operand 5 states. [2020-11-07 01:12:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:12:16,665 INFO L93 Difference]: Finished difference Result 1218 states and 1665 transitions. [2020-11-07 01:12:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:12:16,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-11-07 01:12:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:12:16,694 INFO L225 Difference]: With dead ends: 1218 [2020-11-07 01:12:16,694 INFO L226 Difference]: Without dead ends: 636 [2020-11-07 01:12:16,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-07 01:12:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-11-07 01:12:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 622. [2020-11-07 01:12:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-11-07 01:12:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 783 transitions. [2020-11-07 01:12:16,931 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 783 transitions. Word has length 156 [2020-11-07 01:12:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:12:16,932 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 783 transitions. [2020-11-07 01:12:16,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:12:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 783 transitions. [2020-11-07 01:12:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-11-07 01:12:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:12:16,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:12:16,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:12:16,939 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:12:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:12:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1434909615, now seen corresponding path program 1 times [2020-11-07 01:12:16,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:12:16,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376434080] [2020-11-07 01:12:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:12:17,125 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2020-11-07 01:12:17,603 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:12:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:17,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:12:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:12:18,726 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:12:18,888 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:12:19,259 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:12:19,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376434080] [2020-11-07 01:12:19,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:12:19,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 01:12:19,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620676273] [2020-11-07 01:12:19,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:12:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:12:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:12:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:12:19,990 INFO L87 Difference]: Start difference. First operand 622 states and 783 transitions. Second operand 28 states. [2020-11-07 01:12:20,442 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:12:20,696 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:12:20,822 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:12:20,954 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:12:21,229 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:12:21,607 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2020-11-07 01:12:21,738 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-11-07 01:12:21,907 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-07 01:12:22,055 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:12:22,476 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-11-07 01:12:23,014 WARN L194 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-11-07 01:12:23,551 WARN L194 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-11-07 01:12:24,114 WARN L194 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 128 [2020-11-07 01:12:24,366 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-11-07 01:12:25,306 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:12:25,569 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:12:25,713 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:12:26,101 WARN L194 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-11-07 01:12:26,290 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:12:26,473 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:12:26,664 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-07 01:12:26,887 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:12:27,383 WARN L194 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 124 [2020-11-07 01:12:27,628 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:12:27,766 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:12:28,210 WARN L194 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-11-07 01:12:28,496 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:12:28,630 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:12:29,029 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:12:29,486 WARN L194 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2020-11-07 01:12:29,769 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:12:29,937 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:12:30,506 WARN L194 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2020-11-07 01:12:30,835 WARN L194 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:12:31,148 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:12:31,448 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-11-07 01:12:31,837 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:12:31,989 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-07 01:12:32,341 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:12:32,506 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-07 01:12:32,899 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:12:33,132 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:12:33,774 WARN L194 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-11-07 01:12:34,261 WARN L194 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 118 [2020-11-07 01:12:34,702 WARN L194 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:12:35,220 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 122 [2020-11-07 01:12:35,710 WARN L194 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:12:36,353 WARN L194 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:12:36,824 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 128 [2020-11-07 01:12:37,430 WARN L194 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-07 01:12:37,989 WARN L194 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:12:38,229 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-11-07 01:12:38,728 WARN L194 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2020-11-07 01:12:39,394 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 129 [2020-11-07 01:12:40,285 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:12:40,478 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:12:40,861 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-11-07 01:12:41,341 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-11-07 01:12:48,337 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-11-07 01:12:48,535 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-11-07 01:12:48,746 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:12:48,967 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-11-07 01:12:49,290 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-11-07 01:12:49,494 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 01:12:49,719 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-11-07 01:12:49,915 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-11-07 01:12:50,106 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:12:50,232 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:12:50,363 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:12:50,507 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:12:50,777 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:12:51,000 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:12:51,223 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:12:51,444 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:12:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:12:53,619 INFO L93 Difference]: Finished difference Result 2766 states and 4195 transitions. [2020-11-07 01:12:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-11-07 01:12:53,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 182 [2020-11-07 01:12:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:12:53,653 INFO L225 Difference]: With dead ends: 2766 [2020-11-07 01:12:53,653 INFO L226 Difference]: Without dead ends: 2174 [2020-11-07 01:12:53,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10800 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=3170, Invalid=23890, Unknown=0, NotChecked=0, Total=27060 [2020-11-07 01:12:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2020-11-07 01:12:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1484. [2020-11-07 01:12:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1484 states. [2020-11-07 01:12:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 1965 transitions. [2020-11-07 01:12:54,338 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 1965 transitions. Word has length 182 [2020-11-07 01:12:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:12:54,341 INFO L481 AbstractCegarLoop]: Abstraction has 1484 states and 1965 transitions. [2020-11-07 01:12:54,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:12:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 1965 transitions. [2020-11-07 01:12:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-07 01:12:54,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:12:54,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:12:54,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:12:54,364 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:12:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:12:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1659977216, now seen corresponding path program 1 times [2020-11-07 01:12:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:12:54,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205449451] [2020-11-07 01:12:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:12:54,635 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-11-07 01:12:55,629 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:12:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:56,208 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:12:56,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:12:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:12:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:12:57,167 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:12:57,354 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:12:57,760 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:12:58,176 WARN L194 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:12:58,441 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:12:58,738 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:12:59,048 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:12:59,696 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:13:00,097 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:13:00,508 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:13:00,930 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:13:01,716 WARN L194 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-07 01:13:02,553 WARN L194 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-11-07 01:13:03,410 WARN L194 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-11-07 01:13:03,693 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 26 [2020-11-07 01:13:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205449451] [2020-11-07 01:13:04,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:13:04,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 01:13:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922273458] [2020-11-07 01:13:04,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 01:13:04,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:13:04,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 01:13:04,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1643, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:13:04,886 INFO L87 Difference]: Start difference. First operand 1484 states and 1965 transitions. Second operand 43 states. [2020-11-07 01:13:05,107 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:13:05,263 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:13:05,405 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:13:05,541 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:13:05,669 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:13:05,800 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:13:06,118 WARN L194 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-11-07 01:13:06,505 WARN L194 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 113 [2020-11-07 01:13:06,727 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-11-07 01:13:07,367 WARN L194 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 116 [2020-11-07 01:13:08,108 WARN L194 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-11-07 01:13:08,594 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:13:08,766 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:13:09,172 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 114 [2020-11-07 01:13:09,652 WARN L194 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 119 [2020-11-07 01:13:09,839 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-07 01:13:10,024 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-07 01:13:10,480 WARN L194 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2020-11-07 01:13:10,629 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:13:11,120 WARN L194 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 129 [2020-11-07 01:13:11,835 WARN L194 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 130 [2020-11-07 01:13:12,026 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-11-07 01:13:12,578 WARN L194 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 118 [2020-11-07 01:13:13,134 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 130 [2020-11-07 01:13:13,373 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-11-07 01:13:13,839 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-11-07 01:13:14,162 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-07 01:13:14,815 WARN L194 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 136 [2020-11-07 01:13:15,091 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:13:15,813 WARN L194 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 137 [2020-11-07 01:13:16,138 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-11-07 01:13:16,644 WARN L194 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-07 01:13:17,038 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:13:17,583 WARN L194 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 118 [2020-11-07 01:13:18,600 WARN L194 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 138 [2020-11-07 01:13:18,992 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:13:19,321 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-07 01:13:19,950 WARN L194 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:13:21,133 WARN L194 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 157 DAG size of output: 141 [2020-11-07 01:13:21,600 WARN L194 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:13:22,113 WARN L194 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:13:22,661 WARN L194 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:13:23,907 WARN L194 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 159 DAG size of output: 142 [2020-11-07 01:13:24,425 WARN L194 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-11-07 01:13:25,163 WARN L194 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:13:25,727 WARN L194 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:13:26,077 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2020-11-07 01:13:26,709 WARN L194 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:13:27,514 WARN L194 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:13:28,326 WARN L194 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:13:28,647 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:13:28,869 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-11-07 01:13:29,599 WARN L194 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:13:29,780 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:13:29,931 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:13:30,726 WARN L194 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-11-07 01:13:31,418 WARN L194 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 121 [2020-11-07 01:13:31,622 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:13:31,862 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:13:32,191 WARN L194 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-11-07 01:13:32,518 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:13:32,936 WARN L194 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 119 [2020-11-07 01:13:33,306 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 01:13:33,798 WARN L194 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-11-07 01:13:34,608 WARN L194 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2020-11-07 01:13:35,461 WARN L194 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-11-07 01:13:36,248 WARN L194 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2020-11-07 01:13:36,995 WARN L194 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 136 [2020-11-07 01:13:37,675 WARN L194 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-07 01:13:38,812 WARN L194 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 137 [2020-11-07 01:13:39,969 WARN L194 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 143 [2020-11-07 01:13:41,234 WARN L194 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2020-11-07 01:13:41,874 WARN L194 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-11-07 01:13:43,123 WARN L194 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2020-11-07 01:13:44,317 WARN L194 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 150 [2020-11-07 01:13:44,544 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 01:13:45,579 WARN L194 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 148 [2020-11-07 01:13:45,792 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:13:45,945 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:13:46,164 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:13:47,190 WARN L194 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 149 [2020-11-07 01:13:47,334 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:13:47,731 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:13:47,929 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:13:48,345 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:13:48,569 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:13:49,041 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:13:49,382 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:13:49,626 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:13:50,170 WARN L194 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:13:50,515 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:13:50,720 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:13:51,325 WARN L194 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:13:51,634 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:13:52,251 WARN L194 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:13:52,591 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:13:53,282 WARN L194 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:13:53,701 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:13:54,694 WARN L194 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 135 [2020-11-07 01:13:55,105 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:13:56,238 WARN L194 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2020-11-07 01:13:56,667 WARN L194 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:13:57,860 WARN L194 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2020-11-07 01:13:58,325 WARN L194 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:13:58,882 WARN L194 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:13:59,789 WARN L194 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-11-07 01:14:00,304 WARN L194 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:14:00,913 WARN L194 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:14:02,060 WARN L194 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2020-11-07 01:14:02,648 WARN L194 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:14:03,380 WARN L194 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:14:04,445 WARN L194 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 147 [2020-11-07 01:14:05,078 WARN L194 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:14:06,199 WARN L194 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2020-11-07 01:14:06,883 WARN L194 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:14:07,688 WARN L194 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:14:09,957 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:14:10,262 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:14:10,811 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:14:11,369 WARN L194 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2020-11-07 01:14:12,118 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-11-07 01:14:12,717 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-11-07 01:14:13,404 WARN L194 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-11-07 01:14:14,157 WARN L194 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 128 [2020-11-07 01:14:15,150 WARN L194 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 134 [2020-11-07 01:14:16,037 WARN L194 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2020-11-07 01:14:16,218 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:14:16,584 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 103 [2020-11-07 01:14:17,709 WARN L194 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 136 [2020-11-07 01:14:18,206 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 115 [2020-11-07 01:14:19,464 WARN L194 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2020-11-07 01:14:20,995 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 157 DAG size of output: 140 [2020-11-07 01:14:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:14:24,826 INFO L93 Difference]: Finished difference Result 3757 states and 5041 transitions. [2020-11-07 01:14:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2020-11-07 01:14:24,827 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 194 [2020-11-07 01:14:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:14:24,843 INFO L225 Difference]: With dead ends: 3757 [2020-11-07 01:14:24,843 INFO L226 Difference]: Without dead ends: 2286 [2020-11-07 01:14:24,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20544 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=7317, Invalid=42635, Unknown=0, NotChecked=0, Total=49952 [2020-11-07 01:14:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2020-11-07 01:14:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1811. [2020-11-07 01:14:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1811 states. [2020-11-07 01:14:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2323 transitions. [2020-11-07 01:14:25,534 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2323 transitions. Word has length 194 [2020-11-07 01:14:25,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:14:25,534 INFO L481 AbstractCegarLoop]: Abstraction has 1811 states and 2323 transitions. [2020-11-07 01:14:25,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 01:14:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2323 transitions. [2020-11-07 01:14:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-07 01:14:25,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:14:25,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:14:25,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:14:25,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:14:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:14:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash 680980490, now seen corresponding path program 1 times [2020-11-07 01:14:25,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:14:25,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898488814] [2020-11-07 01:14:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:14:25,830 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-11-07 01:14:25,978 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:14:27,266 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:14:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:14:27,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:14:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:14:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:14:29,437 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:14:30,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898488814] [2020-11-07 01:14:30,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:14:30,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 01:14:30,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050980440] [2020-11-07 01:14:30,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:14:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:14:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:14:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 01:14:30,198 INFO L87 Difference]: Start difference. First operand 1811 states and 2323 transitions. Second operand 28 states. [2020-11-07 01:14:30,396 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-11-07 01:14:30,544 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:14:30,712 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:14:30,845 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:14:30,997 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:14:31,145 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:14:31,473 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 103 [2020-11-07 01:14:31,768 WARN L194 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-11-07 01:14:32,234 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-11-07 01:14:33,290 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-11-07 01:14:33,727 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-11-07 01:14:34,115 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:14:34,484 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-11-07 01:14:34,657 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:14:35,139 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2020-11-07 01:14:37,228 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:14:37,487 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:14:37,734 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:14:37,957 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:14:38,293 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:14:38,519 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-11-07 01:14:38,690 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:14:39,046 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:14:39,731 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:14:40,113 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2020-11-07 01:14:40,335 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-07 01:14:40,611 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-11-07 01:14:40,887 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-11-07 01:14:41,484 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:14:42,010 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:14:42,478 WARN L194 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 105 [2020-11-07 01:14:43,090 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:14:43,692 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:14:43,956 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:14:44,462 WARN L194 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-11-07 01:14:44,958 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-11-07 01:14:48,399 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:14:48,829 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2020-11-07 01:14:51,223 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:14:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:14:58,032 INFO L93 Difference]: Finished difference Result 6564 states and 9574 transitions. [2020-11-07 01:14:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-11-07 01:14:58,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 213 [2020-11-07 01:14:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:14:58,089 INFO L225 Difference]: With dead ends: 6564 [2020-11-07 01:14:58,089 INFO L226 Difference]: Without dead ends: 4933 [2020-11-07 01:14:58,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 58 SyntacticMatches, 24 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10619 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2703, Invalid=22103, Unknown=0, NotChecked=0, Total=24806 [2020-11-07 01:14:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2020-11-07 01:14:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 3697. [2020-11-07 01:14:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3697 states. [2020-11-07 01:14:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 4472 transitions. [2020-11-07 01:14:59,646 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 4472 transitions. Word has length 213 [2020-11-07 01:14:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:14:59,647 INFO L481 AbstractCegarLoop]: Abstraction has 3697 states and 4472 transitions. [2020-11-07 01:14:59,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:14:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 4472 transitions. [2020-11-07 01:14:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-11-07 01:14:59,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:14:59,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:14:59,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:14:59,663 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:14:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:14:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash -881330259, now seen corresponding path program 1 times [2020-11-07 01:14:59,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:14:59,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548060552] [2020-11-07 01:14:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:14:59,809 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:15:00,122 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-11-07 01:15:01,371 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:15:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:15:01,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:15:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:15:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:15:02,657 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:15:02,841 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:15:03,689 WARN L194 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:15:04,400 WARN L194 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:15:05,078 WARN L194 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:15:05,812 WARN L194 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:15:06,563 WARN L194 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:15:08,164 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-11-07 01:15:08,420 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-11-07 01:15:08,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548060552] [2020-11-07 01:15:08,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:15:08,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:15:08,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47017614] [2020-11-07 01:15:08,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 01:15:08,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:15:08,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 01:15:08,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:15:08,931 INFO L87 Difference]: Start difference. First operand 3697 states and 4472 transitions. Second operand 35 states. [2020-11-07 01:15:09,163 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:15:09,336 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:09,500 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:15:09,656 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:09,832 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:15:10,000 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:15:10,321 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-11-07 01:15:10,746 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 113 [2020-11-07 01:15:10,961 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-11-07 01:15:11,374 WARN L194 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-11-07 01:15:12,860 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:15:13,042 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:15:13,406 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 114 [2020-11-07 01:15:13,850 WARN L194 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 119 [2020-11-07 01:15:14,393 WARN L194 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2020-11-07 01:15:14,583 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:15:15,121 WARN L194 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 129 [2020-11-07 01:15:15,327 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:15:15,753 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-07 01:15:16,288 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:15:16,468 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 01:15:16,730 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-11-07 01:15:17,039 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:15:17,305 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-07 01:15:17,674 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-07 01:15:18,026 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-07 01:15:18,212 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:15:18,511 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:15:18,677 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:18,934 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:15:19,103 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:15:19,704 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 115 [2020-11-07 01:15:19,911 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-11-07 01:15:20,301 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-11-07 01:15:20,561 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-07 01:15:20,823 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 01:15:21,132 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:15:21,437 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:15:21,720 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-11-07 01:15:22,008 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:15:22,366 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:15:22,670 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-07 01:15:23,042 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-11-07 01:15:23,346 WARN L194 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:15:23,581 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:23,901 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:15:24,322 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:15:24,592 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:15:25,040 WARN L194 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-11-07 01:15:25,320 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:15:25,797 WARN L194 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 119 [2020-11-07 01:15:26,084 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:15:26,620 WARN L194 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-11-07 01:15:27,277 WARN L194 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2020-11-07 01:15:27,439 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:15:28,159 WARN L194 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-11-07 01:15:28,327 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:15:28,882 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-11-07 01:15:29,230 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:15:29,593 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-11-07 01:15:30,007 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-11-07 01:15:30,521 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:15:31,297 WARN L194 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:15:31,465 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-11-07 01:15:32,100 WARN L194 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:15:32,372 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-07 01:15:33,075 WARN L194 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:15:33,615 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:33,927 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:15:34,583 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:15:35,309 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:15:35,596 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-11-07 01:15:36,012 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-11-07 01:15:36,192 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:15:36,642 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 01:15:37,117 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:15:37,376 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:15:37,701 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:15:38,030 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:15:38,398 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:15:38,801 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:15:39,236 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:15:42,421 WARN L194 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-07 01:15:43,615 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:15:44,071 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:15:44,606 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:15:45,246 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2020-11-07 01:15:46,009 WARN L194 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-11-07 01:15:46,722 WARN L194 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-11-07 01:15:48,417 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:15:48,826 WARN L194 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 103 [2020-11-07 01:15:56,391 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:15:56,556 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:15:56,720 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:15:56,904 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:15:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:15:57,466 INFO L93 Difference]: Finished difference Result 8750 states and 11627 transitions. [2020-11-07 01:15:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2020-11-07 01:15:57,467 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 218 [2020-11-07 01:15:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:15:57,511 INFO L225 Difference]: With dead ends: 8750 [2020-11-07 01:15:57,511 INFO L226 Difference]: Without dead ends: 5233 [2020-11-07 01:15:57,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 60 SyntacticMatches, 21 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19050 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=4564, Invalid=38908, Unknown=0, NotChecked=0, Total=43472 [2020-11-07 01:15:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2020-11-07 01:15:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 4021. [2020-11-07 01:15:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4021 states. [2020-11-07 01:15:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 4838 transitions. [2020-11-07 01:15:59,109 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 4838 transitions. Word has length 218 [2020-11-07 01:15:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:15:59,109 INFO L481 AbstractCegarLoop]: Abstraction has 4021 states and 4838 transitions. [2020-11-07 01:15:59,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 01:15:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 4838 transitions. [2020-11-07 01:15:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-07 01:15:59,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:15:59,124 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:15:59,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:15:59,124 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:15:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:15:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -895429140, now seen corresponding path program 1 times [2020-11-07 01:15:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:15:59,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671588473] [2020-11-07 01:15:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:15:59,238 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2020-11-07 01:15:59,581 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-11-07 01:15:59,746 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:16:01,043 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:16:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:16:01,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:16:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:16:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:16:02,778 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-07 01:16:04,762 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:16:05,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671588473] [2020-11-07 01:16:05,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:16:05,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 01:16:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911285125] [2020-11-07 01:16:05,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 01:16:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:16:05,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 01:16:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:16:05,937 INFO L87 Difference]: Start difference. First operand 4021 states and 4838 transitions. Second operand 39 states. [2020-11-07 01:16:06,155 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:16:06,322 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:16:06,471 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:16:06,617 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:16:06,773 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:16:06,934 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:16:07,277 WARN L194 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 101 [2020-11-07 01:16:07,478 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:16:08,601 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:16:08,845 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:16:09,301 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:16:09,491 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:16:09,699 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:16:09,971 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:16:13,175 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:16:14,181 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:16:14,567 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-11-07 01:16:14,978 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:16:15,952 WARN L194 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 103 [2020-11-07 01:16:17,139 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:16:17,471 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:16:17,776 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:16:21,041 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:16:21,488 WARN L194 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-11-07 01:16:24,421 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:16:32,199 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-11-07 01:16:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:16:33,577 INFO L93 Difference]: Finished difference Result 9879 states and 13191 transitions. [2020-11-07 01:16:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-11-07 01:16:33,578 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 233 [2020-11-07 01:16:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:16:33,622 INFO L225 Difference]: With dead ends: 9879 [2020-11-07 01:16:33,622 INFO L226 Difference]: Without dead ends: 6018 [2020-11-07 01:16:33,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 53 SyntacticMatches, 30 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7257 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1665, Invalid=14337, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 01:16:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2020-11-07 01:16:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4935. [2020-11-07 01:16:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4935 states. [2020-11-07 01:16:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 5785 transitions. [2020-11-07 01:16:36,012 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 5785 transitions. Word has length 233 [2020-11-07 01:16:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:16:36,012 INFO L481 AbstractCegarLoop]: Abstraction has 4935 states and 5785 transitions. [2020-11-07 01:16:36,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 01:16:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 5785 transitions. [2020-11-07 01:16:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-07 01:16:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:16:36,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:16:36,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:16:36,029 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:16:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:16:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1457314591, now seen corresponding path program 1 times [2020-11-07 01:16:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:16:36,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252472171] [2020-11-07 01:16:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:16:36,357 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 39 [2020-11-07 01:16:36,740 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 42 [2020-11-07 01:16:37,829 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:16:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:16:38,334 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2020-11-07 01:16:38,504 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-07 01:16:39,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:16:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:16:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:16:39,882 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-07 01:16:40,064 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:16:40,265 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:16:40,500 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:16:40,988 WARN L194 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:16:41,525 WARN L194 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:16:41,860 WARN L194 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:16:42,222 WARN L194 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:16:42,609 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:16:43,423 WARN L194 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:16:43,875 WARN L194 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:16:44,369 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:16:44,899 WARN L194 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:16:45,893 WARN L194 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-07 01:16:46,925 WARN L194 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-11-07 01:16:47,993 WARN L194 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-11-07 01:16:49,149 WARN L194 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-11-07 01:16:49,871 WARN L194 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-07 01:16:51,073 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-11-07 01:16:51,786 WARN L194 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:16:52,534 WARN L194 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:16:53,920 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-11-07 01:16:55,184 WARN L194 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-11-07 01:16:56,508 WARN L194 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-11-07 01:16:56,878 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 23 [2020-11-07 01:17:02,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252472171] [2020-11-07 01:17:02,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:17:02,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-11-07 01:17:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069076638] [2020-11-07 01:17:02,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-07 01:17:02,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:17:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-07 01:17:02,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 01:17:02,934 INFO L87 Difference]: Start difference. First operand 4935 states and 5785 transitions. Second operand 56 states. [2020-11-07 01:17:03,196 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:17:03,379 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:17:03,539 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:17:03,698 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:17:03,881 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:17:04,062 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:17:04,437 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-11-07 01:17:04,923 WARN L194 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 113 [2020-11-07 01:17:05,173 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-11-07 01:17:05,986 WARN L194 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 116 [2020-11-07 01:17:06,975 WARN L194 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-11-07 01:17:07,438 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:17:07,635 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:17:08,064 WARN L194 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:17:08,540 WARN L194 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2020-11-07 01:17:09,103 WARN L194 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-11-07 01:17:09,280 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:17:09,853 WARN L194 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-11-07 01:17:10,039 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:17:10,675 WARN L194 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 128 [2020-11-07 01:17:10,914 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:17:11,588 WARN L194 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 128 [2020-11-07 01:17:11,867 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:17:12,187 WARN L194 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:17:12,966 WARN L194 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 134 [2020-11-07 01:17:13,302 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:17:14,190 WARN L194 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2020-11-07 01:17:14,534 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-11-07 01:17:14,911 WARN L194 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:17:15,368 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:17:16,651 WARN L194 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 152 DAG size of output: 136 [2020-11-07 01:17:17,136 WARN L194 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:17:17,646 WARN L194 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:17:19,011 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 155 DAG size of output: 139 [2020-11-07 01:17:19,577 WARN L194 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:17:20,244 WARN L194 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:17:20,858 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:17:22,346 WARN L194 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 157 DAG size of output: 140 [2020-11-07 01:17:23,169 WARN L194 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:17:23,826 WARN L194 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-07 01:17:24,477 WARN L194 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:17:26,001 WARN L194 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 158 DAG size of output: 140 [2020-11-07 01:17:26,236 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:17:26,911 WARN L194 SmtUtils]: Spent 578.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:17:28,465 WARN L194 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 159 DAG size of output: 141 [2020-11-07 01:17:29,269 WARN L194 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:17:29,978 WARN L194 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:17:31,654 WARN L194 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 160 DAG size of output: 145 [2020-11-07 01:17:32,407 WARN L194 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:17:33,263 WARN L194 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:17:35,021 WARN L194 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 163 DAG size of output: 148 [2020-11-07 01:17:35,911 WARN L194 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:17:36,116 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:17:37,478 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 164 DAG size of output: 151 [2020-11-07 01:17:38,340 WARN L194 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:17:38,642 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:17:40,368 WARN L194 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 162 DAG size of output: 148 [2020-11-07 01:17:40,588 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:17:41,490 WARN L194 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:17:41,740 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:17:41,977 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:17:42,909 WARN L194 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:17:43,172 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:17:44,133 WARN L194 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:17:45,253 WARN L194 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-11-07 01:17:46,225 WARN L194 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-11-07 01:17:46,951 WARN L194 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-07 01:17:48,013 WARN L194 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-11-07 01:17:49,039 WARN L194 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-11-07 01:17:50,076 WARN L194 SmtUtils]: Spent 783.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-07 01:17:50,315 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:17:50,512 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:17:50,802 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:17:51,184 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:17:51,661 WARN L194 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:17:52,226 WARN L194 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:17:52,841 WARN L194 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:17:53,623 WARN L194 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:17:54,554 WARN L194 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:17:54,746 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 01:17:55,537 WARN L194 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:17:56,532 WARN L194 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:17:57,425 WARN L194 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-11-07 01:17:57,659 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-07 01:17:58,845 WARN L194 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 143 DAG size of output: 135 [2020-11-07 01:18:00,334 WARN L194 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2020-11-07 01:18:01,322 WARN L194 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-11-07 01:18:01,602 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-11-07 01:18:03,160 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2020-11-07 01:18:03,444 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:18:03,936 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 01:18:05,193 WARN L194 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-11-07 01:18:05,547 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-11-07 01:18:05,702 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 01:18:07,442 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 161 DAG size of output: 158 [2020-11-07 01:18:08,011 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:18:08,220 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:18:09,500 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2020-11-07 01:18:09,931 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-11-07 01:18:10,485 WARN L194 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 116 [2020-11-07 01:18:11,661 WARN L194 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2020-11-07 01:18:12,220 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:18:13,667 WARN L194 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 154 DAG size of output: 147 [2020-11-07 01:18:14,228 WARN L194 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:18:14,679 WARN L194 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-11-07 01:18:15,123 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-11-07 01:18:16,531 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2020-11-07 01:18:17,100 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:18:17,945 WARN L194 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:18:19,436 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 157 DAG size of output: 148 [2020-11-07 01:18:20,091 WARN L194 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:18:20,757 WARN L194 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 116 [2020-11-07 01:18:22,250 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 158 DAG size of output: 149 [2020-11-07 01:18:22,984 WARN L194 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:18:24,623 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 158 DAG size of output: 153 [2020-11-07 01:18:25,487 WARN L194 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-11-07 01:18:27,177 WARN L194 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2020-11-07 01:18:28,196 WARN L194 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:18:29,954 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 162 DAG size of output: 157 [2020-11-07 01:18:30,803 WARN L194 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:18:32,613 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 163 DAG size of output: 158 [2020-11-07 01:18:32,967 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:18:34,750 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2020-11-07 01:18:35,752 WARN L194 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:18:36,822 WARN L194 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:18:37,358 WARN L194 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-11-07 01:18:38,959 WARN L194 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-11-07 01:18:39,265 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:18:40,215 WARN L194 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-07 01:18:40,477 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-11-07 01:18:40,773 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:18:41,738 WARN L194 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-07 01:18:42,878 WARN L194 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 118 [2020-11-07 01:18:43,193 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:18:43,389 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 01:18:44,402 WARN L194 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-11-07 01:18:45,619 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 165 DAG size of output: 121 [2020-11-07 01:18:46,532 WARN L194 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:18:47,803 WARN L194 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-11-07 01:18:49,162 WARN L194 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-11-07 01:18:50,339 WARN L194 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-11-07 01:18:50,836 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:18:57,337 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:18:58,624 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-11-07 01:19:00,021 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-11-07 01:19:00,437 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-07 01:19:00,848 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-11-07 01:19:02,552 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:19:03,028 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2020-11-07 01:19:03,595 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2020-11-07 01:19:04,982 WARN L194 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 119 [2020-11-07 01:19:06,540 WARN L194 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 116 [2020-11-07 01:19:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:19:11,477 INFO L93 Difference]: Finished difference Result 11569 states and 14713 transitions. [2020-11-07 01:19:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2020-11-07 01:19:11,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 239 [2020-11-07 01:19:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:19:11,551 INFO L225 Difference]: With dead ends: 11569 [2020-11-07 01:19:11,551 INFO L226 Difference]: Without dead ends: 6814 [2020-11-07 01:19:11,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 47 SyntacticMatches, 23 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27919 ImplicationChecksByTransitivity, 128.5s TimeCoverageRelationStatistics Valid=10153, Invalid=59279, Unknown=0, NotChecked=0, Total=69432 [2020-11-07 01:19:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6814 states. [2020-11-07 01:19:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6814 to 5409. [2020-11-07 01:19:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5409 states. [2020-11-07 01:19:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 6398 transitions. [2020-11-07 01:19:14,050 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 6398 transitions. Word has length 239 [2020-11-07 01:19:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:19:14,050 INFO L481 AbstractCegarLoop]: Abstraction has 5409 states and 6398 transitions. [2020-11-07 01:19:14,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-07 01:19:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 6398 transitions. [2020-11-07 01:19:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 01:19:14,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:19:14,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:19:14,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:19:14,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:19:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:19:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1102905945, now seen corresponding path program 1 times [2020-11-07 01:19:14,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:19:14,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209996618] [2020-11-07 01:19:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:19:14,261 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:19:14,547 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2020-11-07 01:19:14,911 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-11-07 01:19:16,262 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:19:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:19:16,826 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-11-07 01:19:17,061 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2020-11-07 01:19:17,373 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-07 01:19:17,935 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:19:17,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:19:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:19:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:19:18,790 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 01:19:18,974 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-07 01:19:19,191 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:19:19,440 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:19:20,357 WARN L194 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:19:21,063 WARN L194 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:19:21,779 WARN L194 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:19:22,585 WARN L194 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:19:23,331 WARN L194 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:19:23,938 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 01:19:26,590 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-07 01:19:27,454 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:19:29,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209996618] [2020-11-07 01:19:29,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:19:29,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 01:19:29,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046122853] [2020-11-07 01:19:29,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 01:19:29,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:19:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 01:19:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=2465, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 01:19:29,292 INFO L87 Difference]: Start difference. First operand 5409 states and 6398 transitions. Second operand 47 states. [2020-11-07 01:19:29,555 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:19:29,770 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:19:29,951 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:19:30,134 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:19:30,344 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:19:30,553 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:19:30,977 WARN L194 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-11-07 01:19:31,562 WARN L194 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 113 [2020-11-07 01:19:31,891 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-07 01:19:32,480 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-11-07 01:19:33,050 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-07 01:19:34,575 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-11-07 01:19:34,940 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:19:35,207 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-11-07 01:19:35,719 WARN L194 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2020-11-07 01:19:36,324 WARN L194 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 122 [2020-11-07 01:19:37,110 WARN L194 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 126 [2020-11-07 01:19:37,419 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:19:38,116 WARN L194 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2020-11-07 01:19:38,404 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:19:39,065 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-11-07 01:19:39,970 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:19:40,654 WARN L194 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:19:41,569 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-11-07 01:19:42,046 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-11-07 01:19:42,263 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:19:42,488 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-11-07 01:19:42,848 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-11-07 01:19:43,082 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:19:43,436 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:19:43,896 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-11-07 01:19:44,334 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-11-07 01:19:44,852 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-11-07 01:19:45,202 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-11-07 01:19:45,398 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 01:19:45,884 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-11-07 01:19:46,432 WARN L194 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:19:46,952 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:19:47,351 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:19:47,777 WARN L194 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 01:19:48,396 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-11-07 01:19:48,675 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:19:49,179 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 01:19:49,622 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:19:49,992 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:19:50,241 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:19:50,937 WARN L194 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:19:51,655 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2020-11-07 01:19:52,435 WARN L194 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2020-11-07 01:19:52,813 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-07 01:19:53,542 WARN L194 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2020-11-07 01:19:53,860 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-07 01:19:54,866 WARN L194 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 138 [2020-11-07 01:19:55,487 WARN L194 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-11-07 01:19:56,126 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-11-07 01:19:56,926 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:19:57,747 WARN L194 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 01:19:58,080 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:19:58,737 WARN L194 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 118 [2020-11-07 01:19:59,231 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-07 01:19:59,956 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:20:00,238 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:20:00,913 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-11-07 01:20:01,743 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-07 01:20:02,934 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:20:03,730 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:20:04,450 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:20:05,632 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:20:06,160 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:20:06,745 WARN L194 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-11-07 01:20:07,131 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:20:07,811 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:20:08,362 WARN L194 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 97 [2020-11-07 01:20:09,037 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:20:09,870 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:20:10,085 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:20:10,759 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-11-07 01:20:11,303 WARN L194 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:20:11,526 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:20:12,395 WARN L194 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:20:12,731 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:20:13,010 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-11-07 01:20:13,701 WARN L194 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:20:14,221 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-07 01:20:14,968 WARN L194 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:20:16,048 WARN L194 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:20:17,099 WARN L194 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:20:18,077 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-11-07 01:20:18,339 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:20:19,757 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:20:20,102 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:20:20,684 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:20:23,021 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-07 01:20:25,220 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:20:25,828 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:20:26,511 WARN L194 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:20:27,261 WARN L194 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 117 [2020-11-07 01:20:27,758 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:20:28,861 WARN L194 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 121 [2020-11-07 01:20:29,860 WARN L194 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2020-11-07 01:20:32,008 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-11-07 01:20:38,552 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:20:39,105 WARN L194 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2020-11-07 01:20:39,852 WARN L194 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2020-11-07 01:20:47,175 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-11-07 01:20:47,364 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-11-07 01:20:47,547 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-11-07 01:20:47,715 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-11-07 01:20:48,847 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:20:49,247 WARN L194 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:20:49,698 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:20:50,099 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:20:50,513 WARN L194 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:20:51,087 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:20:51,339 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:20:51,596 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:20:51,880 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:20:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:20:53,450 INFO L93 Difference]: Finished difference Result 12571 states and 16148 transitions. [2020-11-07 01:20:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2020-11-07 01:20:53,451 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 247 [2020-11-07 01:20:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:20:53,504 INFO L225 Difference]: With dead ends: 12571 [2020-11-07 01:20:53,505 INFO L226 Difference]: Without dead ends: 7342 [2020-11-07 01:20:53,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 61 SyntacticMatches, 37 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25165 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=5741, Invalid=50665, Unknown=0, NotChecked=0, Total=56406 [2020-11-07 01:20:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7342 states. [2020-11-07 01:20:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7342 to 5745. [2020-11-07 01:20:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5745 states. [2020-11-07 01:20:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5745 states to 5745 states and 6744 transitions. [2020-11-07 01:20:56,034 INFO L78 Accepts]: Start accepts. Automaton has 5745 states and 6744 transitions. Word has length 247 [2020-11-07 01:20:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:20:56,035 INFO L481 AbstractCegarLoop]: Abstraction has 5745 states and 6744 transitions. [2020-11-07 01:20:56,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 01:20:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5745 states and 6744 transitions. [2020-11-07 01:20:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-11-07 01:20:56,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:20:56,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:20:56,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:20:56,054 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:20:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:20:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1068486972, now seen corresponding path program 1 times [2020-11-07 01:20:56,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:20:56,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101301324] [2020-11-07 01:20:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:20:56,277 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:20:56,700 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-11-07 01:20:57,097 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-11-07 01:20:58,631 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:20:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:20:59,036 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2020-11-07 01:20:59,498 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:20:59,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:20:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:20:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:21:00,327 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 01:21:00,526 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-07 01:21:00,776 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:21:01,050 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:21:01,226 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 22 [2020-11-07 01:21:02,028 WARN L194 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:21:02,809 WARN L194 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:21:03,548 WARN L194 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:21:04,359 WARN L194 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:21:05,101 WARN L194 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:21:05,756 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 01:21:07,245 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-11-07 01:21:09,318 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-07 01:21:10,657 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:21:13,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101301324] [2020-11-07 01:21:13,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:21:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-11-07 01:21:13,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20407421] [2020-11-07 01:21:13,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-11-07 01:21:13,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:21:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-11-07 01:21:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=2160, Unknown=2, NotChecked=0, Total=2756 [2020-11-07 01:21:13,385 INFO L87 Difference]: Start difference. First operand 5745 states and 6744 transitions. Second operand 48 states. [2020-11-07 01:21:13,857 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:21:14,144 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:21:14,341 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:21:14,541 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:21:14,781 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:21:15,021 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:21:15,281 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:21:15,822 WARN L194 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2020-11-07 01:21:16,471 WARN L194 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2020-11-07 01:21:16,885 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-11-07 01:21:17,602 WARN L194 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 126 [2020-11-07 01:21:18,458 WARN L194 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 132 [2020-11-07 01:21:19,051 WARN L194 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-11-07 01:21:19,741 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-11-07 01:21:20,198 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-11-07 01:21:21,035 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:21:21,390 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:21:23,253 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:21:23,617 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-11-07 01:21:24,326 WARN L194 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:21:25,439 WARN L194 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:21:25,912 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:21:26,315 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:21:26,721 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:21:27,256 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-11-07 01:21:27,596 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-07 01:21:28,031 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:21:28,618 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-11-07 01:21:28,858 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 01:21:29,327 WARN L194 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:21:29,853 WARN L194 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-11-07 01:21:30,388 WARN L194 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:21:30,659 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-11-07 01:21:31,149 WARN L194 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:21:31,647 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:21:32,249 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:21:32,659 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:21:33,421 WARN L194 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:21:34,204 WARN L194 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:21:35,002 WARN L194 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:21:35,958 WARN L194 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:21:36,305 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:21:37,284 WARN L194 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:21:37,680 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:21:38,702 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:21:39,180 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-07 01:21:39,562 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:21:40,135 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:21:40,834 WARN L194 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:21:41,550 WARN L194 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:21:41,948 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:21:42,612 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:21:43,461 WARN L194 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:21:43,866 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-07 01:21:44,314 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:21:44,757 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-11-07 01:21:45,479 WARN L194 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-07 01:21:46,624 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-11-07 01:21:47,018 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:21:47,629 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:21:48,359 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:21:49,498 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:21:50,260 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-07 01:21:50,825 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-11-07 01:21:52,801 WARN L194 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:21:53,284 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-11-07 01:21:54,619 WARN L194 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:21:55,381 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:21:58,530 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-07 01:21:59,080 WARN L194 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-07 01:21:59,578 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-11-07 01:22:00,228 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-11-07 01:22:02,217 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-07 01:22:02,505 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:22:03,179 WARN L194 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-11-07 01:22:03,530 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:22:04,382 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2020-11-07 01:22:05,469 WARN L194 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 116 [2020-11-07 01:22:06,700 WARN L194 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2020-11-07 01:22:07,376 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-07 01:22:08,595 WARN L194 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 131 [2020-11-07 01:22:10,645 WARN L194 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-07 01:22:38,980 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-07 01:22:39,511 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:22:39,911 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:22:40,249 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:22:40,583 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:22:43,534 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-11-07 01:22:43,958 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-07 01:22:44,316 WARN L194 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-07 01:22:44,701 WARN L194 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-07 01:22:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:22:47,042 INFO L93 Difference]: Finished difference Result 14979 states and 19785 transitions. [2020-11-07 01:22:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2020-11-07 01:22:47,045 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 252 [2020-11-07 01:22:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:22:47,103 INFO L225 Difference]: With dead ends: 14979 [2020-11-07 01:22:47,103 INFO L226 Difference]: Without dead ends: 9313 [2020-11-07 01:22:47,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 53 SyntacticMatches, 44 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16230 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=4313, Invalid=31217, Unknown=2, NotChecked=0, Total=35532 [2020-11-07 01:22:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9313 states. [2020-11-07 01:22:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9313 to 7176. [2020-11-07 01:22:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7176 states. [2020-11-07 01:22:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 8492 transitions. [2020-11-07 01:22:50,438 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 8492 transitions. Word has length 252 [2020-11-07 01:22:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:22:50,439 INFO L481 AbstractCegarLoop]: Abstraction has 7176 states and 8492 transitions. [2020-11-07 01:22:50,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-11-07 01:22:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 8492 transitions. [2020-11-07 01:22:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 01:22:50,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:22:50,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:22:50,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:22:50,454 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:22:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:22:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1615113167, now seen corresponding path program 1 times [2020-11-07 01:22:50,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:22:50,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500417993] [2020-11-07 01:22:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:22:50,794 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-11-07 01:22:51,347 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2020-11-07 01:22:51,794 WARN L194 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2020-11-07 01:22:53,726 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:22:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:22:54,483 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-11-07 01:22:55,189 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:22:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:22:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:22:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:22:55,862 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-11-07 01:22:56,259 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 01:22:56,631 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-07 01:22:57,633 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2020-11-07 01:22:58,669 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:23:00,263 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:23:02,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500417993] [2020-11-07 01:23:02,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:23:02,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-11-07 01:23:02,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127054371] [2020-11-07 01:23:02,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-07 01:23:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:23:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-07 01:23:02,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1875, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 01:23:02,551 INFO L87 Difference]: Start difference. First operand 7176 states and 8492 transitions. Second operand 42 states. [2020-11-07 01:23:03,057 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:23:03,401 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:23:03,679 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:23:03,944 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:23:04,237 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:23:04,546 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:23:04,855 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:23:05,269 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-07 01:23:05,794 WARN L194 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-11-07 01:23:06,446 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:23:06,966 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:23:07,475 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:23:08,988 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:23:09,355 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:23:09,684 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:23:10,614 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:23:12,370 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:23:12,872 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:23:20,620 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:23:30,228 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:23:30,892 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-07 01:23:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:23:49,068 INFO L93 Difference]: Finished difference Result 16506 states and 19865 transitions. [2020-11-07 01:23:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-07 01:23:49,071 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 257 [2020-11-07 01:23:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:23:49,103 INFO L225 Difference]: With dead ends: 16506 [2020-11-07 01:23:49,103 INFO L226 Difference]: Without dead ends: 9263 [2020-11-07 01:23:49,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 53 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3945 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=871, Invalid=4099, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:23:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2020-11-07 01:23:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 8316. [2020-11-07 01:23:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8316 states. [2020-11-07 01:23:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8316 states to 8316 states and 9818 transitions. [2020-11-07 01:23:52,924 INFO L78 Accepts]: Start accepts. Automaton has 8316 states and 9818 transitions. Word has length 257 [2020-11-07 01:23:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:23:52,925 INFO L481 AbstractCegarLoop]: Abstraction has 8316 states and 9818 transitions. [2020-11-07 01:23:52,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-07 01:23:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8316 states and 9818 transitions. [2020-11-07 01:23:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-11-07 01:23:52,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:23:52,943 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:23:52,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:23:52,943 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:23:52,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:23:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1045598475, now seen corresponding path program 1 times [2020-11-07 01:23:52,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:23:52,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356360548] [2020-11-07 01:23:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:23:53,397 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 33 [2020-11-07 01:23:53,842 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-11-07 01:23:54,068 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:23:55,565 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:23:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:23:56,142 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:23:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:23:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:23:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:23:57,827 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-07 01:23:58,510 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:24:01,541 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 01:24:02,378 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-07 01:24:03,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356360548] [2020-11-07 01:24:03,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:24:03,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 01:24:03,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535922390] [2020-11-07 01:24:03,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 01:24:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:24:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 01:24:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1365, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 01:24:03,622 INFO L87 Difference]: Start difference. First operand 8316 states and 9818 transitions. Second operand 38 states. [2020-11-07 01:24:03,900 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:24:04,109 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:24:04,282 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:24:04,455 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:24:04,645 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:24:04,843 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:24:05,267 WARN L194 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 101 [2020-11-07 01:24:05,496 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:24:06,179 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-11-07 01:24:06,856 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:24:07,136 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:24:07,684 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:24:07,926 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:24:08,174 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:24:08,482 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:24:10,245 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:24:11,549 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:24:12,076 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:24:12,396 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:24:13,303 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:24:13,724 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:24:17,529 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:24:18,015 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-11-07 01:24:19,636 WARN L194 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 103 [2020-11-07 01:24:20,325 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:24:20,781 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:24:21,027 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:24:21,383 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:24:21,826 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:24:26,768 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:24:27,327 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-11-07 01:24:30,669 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:24:37,345 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:24:39,981 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2020-11-07 01:24:42,006 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-11-07 01:24:42,308 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-11-07 01:24:42,845 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-11-07 01:24:43,065 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-11-07 01:24:43,231 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-11-07 01:24:43,384 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-11-07 01:24:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:24:43,852 INFO L93 Difference]: Finished difference Result 17070 states and 21591 transitions. [2020-11-07 01:24:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-11-07 01:24:43,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 262 [2020-11-07 01:24:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:24:43,899 INFO L225 Difference]: With dead ends: 17070 [2020-11-07 01:24:43,899 INFO L226 Difference]: Without dead ends: 9918 [2020-11-07 01:24:43,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 52 SyntacticMatches, 61 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9017 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=1910, Invalid=16180, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 01:24:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2020-11-07 01:24:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 8656. [2020-11-07 01:24:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8656 states. [2020-11-07 01:24:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 10172 transitions. [2020-11-07 01:24:47,924 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 10172 transitions. Word has length 262 [2020-11-07 01:24:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:24:47,924 INFO L481 AbstractCegarLoop]: Abstraction has 8656 states and 10172 transitions. [2020-11-07 01:24:47,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 01:24:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 10172 transitions. [2020-11-07 01:24:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-11-07 01:24:47,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:24:47,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:24:47,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:24:47,945 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:24:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:24:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1828005044, now seen corresponding path program 1 times [2020-11-07 01:24:47,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:24:47,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835302484] [2020-11-07 01:24:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:24:48,480 WARN L194 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 37 [2020-11-07 01:24:48,945 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 43 [2020-11-07 01:24:49,704 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 118 [2020-11-07 01:24:49,798 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:24:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:24:50,473 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:24:50,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:24:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:24:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:24:51,205 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-11-07 01:24:51,393 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-07 01:24:51,611 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:24:51,864 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:24:52,156 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:24:52,772 WARN L194 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:24:53,487 WARN L194 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:24:53,914 WARN L194 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:24:54,368 WARN L194 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:24:54,872 WARN L194 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:24:55,822 WARN L194 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:24:56,450 WARN L194 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:24:57,058 WARN L194 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:24:57,707 WARN L194 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:24:58,961 WARN L194 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-07 01:25:00,343 WARN L194 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-11-07 01:25:01,771 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-11-07 01:25:03,234 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-11-07 01:25:04,087 WARN L194 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-07 01:25:05,704 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-11-07 01:25:06,629 WARN L194 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:25:07,601 WARN L194 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:25:09,458 WARN L194 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-11-07 01:25:11,102 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-11-07 01:25:12,757 WARN L194 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 84 DAG size of output: 84