/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:25:16,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:16,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:16,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:25:16,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:25:16,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:25:16,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:25:16,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:25:16,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:25:16,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:25:16,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:25:16,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:25:16,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:16,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:16,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:16,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:16,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:16,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:16,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:16,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:16,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:16,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:16,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:16,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:16,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:16,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:25:16,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:25:16,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:25:16,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:25:16,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:25:16,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:25:16,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:25:16,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:25:16,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:16,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:16,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:16,161 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 00:25:16,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:16,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:16,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:16,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:16,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:16,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:16,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:16,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:16,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:16,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:16,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:16,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:16,196 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:16,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:16,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:16,197 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:16,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:16,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:16,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:16,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:16,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:16,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:16,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:16,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:16,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:16,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:16,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:16,665 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:16,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-11-07 00:25:16,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875ec4eee/be352d9d66e14fe984341b5df50bc001/FLAG401abf372 [2020-11-07 00:25:17,405 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:17,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-11-07 00:25:17,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875ec4eee/be352d9d66e14fe984341b5df50bc001/FLAG401abf372 [2020-11-07 00:25:17,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875ec4eee/be352d9d66e14fe984341b5df50bc001 [2020-11-07 00:25:17,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:17,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:17,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:17,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:17,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:17,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:17" (1/1) ... [2020-11-07 00:25:17,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f180cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:17, skipping insertion in model container [2020-11-07 00:25:17,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:17" (1/1) ... [2020-11-07 00:25:17,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:17,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:18,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:18,102 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:18,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:18,203 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:18,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18 WrapperNode [2020-11-07 00:25:18,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:18,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:18,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:18,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:18,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (1/1) ... [2020-11-07 00:25:18,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:18,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:18,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:18,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:18,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (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 00:25:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 00:25:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-11-07 00:25:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-11-07 00:25:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-11-07 00:25:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:18,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-07 00:25:18,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:25:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 00:25:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-11-07 00:25:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-11-07 00:25:18,390 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-11-07 00:25:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:19,048 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:19,048 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 00:25:19,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:19 BoogieIcfgContainer [2020-11-07 00:25:19,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:19,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:19,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:19,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:19,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:17" (1/3) ... [2020-11-07 00:25:19,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a312547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:19, skipping insertion in model container [2020-11-07 00:25:19,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:18" (2/3) ... [2020-11-07 00:25:19,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a312547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:19, skipping insertion in model container [2020-11-07 00:25:19,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:19" (3/3) ... [2020-11-07 00:25:19,060 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-11-07 00:25:19,077 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:19,082 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:19,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:19,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:19,122 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:19,122 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:19,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:19,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:19,123 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:19,123 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:19,123 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-11-07 00:25:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 00:25:19,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:19,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:19,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -415784909, now seen corresponding path program 1 times [2020-11-07 00:25:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:19,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327818393] [2020-11-07 00:25:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:19,271 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-11-07 00:25:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-11-07 00:25:19,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327818393] [2020-11-07 00:25:19,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:19,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:25:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779119107] [2020-11-07 00:25:19,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:25:19,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:25:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:25:19,749 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2020-11-07 00:25:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:20,315 INFO L93 Difference]: Finished difference Result 266 states and 323 transitions. [2020-11-07 00:25:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:25:20,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-11-07 00:25:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:20,330 INFO L225 Difference]: With dead ends: 266 [2020-11-07 00:25:20,331 INFO L226 Difference]: Without dead ends: 135 [2020-11-07 00:25:20,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-07 00:25:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-11-07 00:25:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-07 00:25:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-11-07 00:25:20,411 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 109 [2020-11-07 00:25:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:20,413 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-11-07 00:25:20,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:25:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-11-07 00:25:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-07 00:25:20,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:20,418 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:20,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:20,419 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2075471796, now seen corresponding path program 1 times [2020-11-07 00:25:20,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:20,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808240169] [2020-11-07 00:25:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:20,426 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-11-07 00:25:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808240169] [2020-11-07 00:25:20,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:20,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:20,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399075083] [2020-11-07 00:25:20,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:20,742 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 5 states. [2020-11-07 00:25:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:21,206 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-11-07 00:25:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:25:21,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-11-07 00:25:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:21,210 INFO L225 Difference]: With dead ends: 152 [2020-11-07 00:25:21,210 INFO L226 Difference]: Without dead ends: 134 [2020-11-07 00:25:21,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-07 00:25:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-11-07 00:25:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-07 00:25:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2020-11-07 00:25:21,239 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 111 [2020-11-07 00:25:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:21,240 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2020-11-07 00:25:21,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2020-11-07 00:25:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-07 00:25:21,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:21,243 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:21,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:21,243 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash 37781676, now seen corresponding path program 1 times [2020-11-07 00:25:21,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:21,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18182833] [2020-11-07 00:25:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:21,248 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-11-07 00:25:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-11-07 00:25:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-07 00:25:21,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18182833] [2020-11-07 00:25:21,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:21,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:21,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99869305] [2020-11-07 00:25:21,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:21,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:21,395 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand 5 states. [2020-11-07 00:25:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:21,914 INFO L93 Difference]: Finished difference Result 273 states and 320 transitions. [2020-11-07 00:25:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:25:21,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-11-07 00:25:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:21,920 INFO L225 Difference]: With dead ends: 273 [2020-11-07 00:25:21,920 INFO L226 Difference]: Without dead ends: 175 [2020-11-07 00:25:21,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-07 00:25:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2020-11-07 00:25:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-07 00:25:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2020-11-07 00:25:21,969 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 111 [2020-11-07 00:25:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2020-11-07 00:25:21,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2020-11-07 00:25:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-07 00:25:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:21,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:21,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:25:21,982 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1061811624, now seen corresponding path program 1 times [2020-11-07 00:25:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:21,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781033768] [2020-11-07 00:25:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:21,986 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-07 00:25:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-07 00:25:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-11-07 00:25:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:22,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781033768] [2020-11-07 00:25:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:22,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:22,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881085691] [2020-11-07 00:25:22,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:22,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:22,127 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 5 states. [2020-11-07 00:25:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:22,660 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2020-11-07 00:25:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:25:22,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2020-11-07 00:25:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:22,663 INFO L225 Difference]: With dead ends: 284 [2020-11-07 00:25:22,663 INFO L226 Difference]: Without dead ends: 176 [2020-11-07 00:25:22,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-07 00:25:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2020-11-07 00:25:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-11-07 00:25:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2020-11-07 00:25:22,701 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 114 [2020-11-07 00:25:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:22,702 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2020-11-07 00:25:22,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2020-11-07 00:25:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-07 00:25:22,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:22,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-11-07 00:25:22,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:25:22,705 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash -503903925, now seen corresponding path program 1 times [2020-11-07 00:25:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:22,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783515481] [2020-11-07 00:25:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:22,861 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:22,886 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:22,888 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:22,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 00:25:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-07 00:25:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-07 00:25:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:23,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783515481] [2020-11-07 00:25:23,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788865005] [2020-11-07 00:25:23,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:23,101 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand 6 states. [2020-11-07 00:25:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:23,696 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2020-11-07 00:25:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:25:23,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-11-07 00:25:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:23,699 INFO L225 Difference]: With dead ends: 320 [2020-11-07 00:25:23,700 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 00:25:23,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 00:25:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2020-11-07 00:25:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 00:25:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 209 transitions. [2020-11-07 00:25:23,758 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 209 transitions. Word has length 119 [2020-11-07 00:25:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:23,760 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 209 transitions. [2020-11-07 00:25:23,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 209 transitions. [2020-11-07 00:25:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-07 00:25:23,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:23,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:23,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:25:23,763 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:23,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1598599897, now seen corresponding path program 1 times [2020-11-07 00:25:23,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:23,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656457406] [2020-11-07 00:25:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:23,768 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-07 00:25:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-11-07 00:25:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:23,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-07 00:25:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:24,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656457406] [2020-11-07 00:25:24,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:24,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241836162] [2020-11-07 00:25:24,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:24,006 INFO L87 Difference]: Start difference. First operand 180 states and 209 transitions. Second operand 6 states. [2020-11-07 00:25:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:24,640 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2020-11-07 00:25:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:25:24,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-11-07 00:25:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:24,642 INFO L225 Difference]: With dead ends: 320 [2020-11-07 00:25:24,642 INFO L226 Difference]: Without dead ends: 201 [2020-11-07 00:25:24,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-11-07 00:25:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-11-07 00:25:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-07 00:25:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 212 transitions. [2020-11-07 00:25:24,680 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 212 transitions. Word has length 119 [2020-11-07 00:25:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:24,680 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 212 transitions. [2020-11-07 00:25:24,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 212 transitions. [2020-11-07 00:25:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-07 00:25:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:24,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-11-07 00:25:24,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:25:24,683 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1705231240, now seen corresponding path program 2 times [2020-11-07 00:25:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:24,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062983858] [2020-11-07 00:25:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:24,817 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:24,977 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:24,979 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:24,982 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-07 00:25:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:25:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-11-07 00:25:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:25,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062983858] [2020-11-07 00:25:25,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:25,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:25,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675245261] [2020-11-07 00:25:25,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:25,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:25,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:25,153 INFO L87 Difference]: Start difference. First operand 183 states and 212 transitions. Second operand 7 states. [2020-11-07 00:25:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:25,743 INFO L93 Difference]: Finished difference Result 354 states and 418 transitions. [2020-11-07 00:25:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:25:25,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-11-07 00:25:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:25,750 INFO L225 Difference]: With dead ends: 354 [2020-11-07 00:25:25,750 INFO L226 Difference]: Without dead ends: 225 [2020-11-07 00:25:25,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-11-07 00:25:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2020-11-07 00:25:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 00:25:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2020-11-07 00:25:25,793 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 124 [2020-11-07 00:25:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:25,793 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2020-11-07 00:25:25,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2020-11-07 00:25:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-07 00:25:25,795 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:25,796 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-11-07 00:25:25,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:25:25,796 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash -487232234, now seen corresponding path program 1 times [2020-11-07 00:25:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:25,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495556273] [2020-11-07 00:25:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:25,962 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:25,967 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:25,969 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-11-07 00:25:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:25:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-11-07 00:25:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:26,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495556273] [2020-11-07 00:25:26,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:26,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226979434] [2020-11-07 00:25:26,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:26,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:26,156 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand 7 states. [2020-11-07 00:25:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:26,945 INFO L93 Difference]: Finished difference Result 348 states and 412 transitions. [2020-11-07 00:25:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:25:26,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-11-07 00:25:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:26,948 INFO L225 Difference]: With dead ends: 348 [2020-11-07 00:25:26,948 INFO L226 Difference]: Without dead ends: 221 [2020-11-07 00:25:26,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-11-07 00:25:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2020-11-07 00:25:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-11-07 00:25:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 225 transitions. [2020-11-07 00:25:26,984 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 225 transitions. Word has length 124 [2020-11-07 00:25:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:26,984 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 225 transitions. [2020-11-07 00:25:26,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 225 transitions. [2020-11-07 00:25:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 00:25:26,986 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:26,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:26,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:25:26,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash 452126571, now seen corresponding path program 3 times [2020-11-07 00:25:26,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:26,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607884547] [2020-11-07 00:25:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:27,130 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:27,264 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:27,269 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:27,271 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-07 00:25:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 00:25:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-07 00:25:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:27,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607884547] [2020-11-07 00:25:27,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:27,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:25:27,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933820632] [2020-11-07 00:25:27,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:25:27,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:25:27,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:27,425 INFO L87 Difference]: Start difference. First operand 193 states and 225 transitions. Second operand 8 states. [2020-11-07 00:25:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:28,366 INFO L93 Difference]: Finished difference Result 381 states and 451 transitions. [2020-11-07 00:25:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:25:28,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-11-07 00:25:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:28,370 INFO L225 Difference]: With dead ends: 381 [2020-11-07 00:25:28,370 INFO L226 Difference]: Without dead ends: 247 [2020-11-07 00:25:28,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-07 00:25:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 203. [2020-11-07 00:25:28,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 00:25:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2020-11-07 00:25:28,414 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 129 [2020-11-07 00:25:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:28,415 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2020-11-07 00:25:28,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:25:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2020-11-07 00:25:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-07 00:25:28,417 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:28,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-11-07 00:25:28,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:25:28,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1740336903, now seen corresponding path program 2 times [2020-11-07 00:25:28,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:28,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834794178] [2020-11-07 00:25:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:28,547 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:28,550 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:28,551 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-07 00:25:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 00:25:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-11-07 00:25:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:28,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834794178] [2020-11-07 00:25:28,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:28,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:25:28,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356164869] [2020-11-07 00:25:28,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:25:28,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:28,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:25:28,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:25:28,743 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand 8 states. [2020-11-07 00:25:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:29,820 INFO L93 Difference]: Finished difference Result 367 states and 437 transitions. [2020-11-07 00:25:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:25:29,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2020-11-07 00:25:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:29,822 INFO L225 Difference]: With dead ends: 367 [2020-11-07 00:25:29,823 INFO L226 Difference]: Without dead ends: 235 [2020-11-07 00:25:29,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-11-07 00:25:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 203. [2020-11-07 00:25:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-11-07 00:25:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2020-11-07 00:25:29,865 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 129 [2020-11-07 00:25:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:29,865 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2020-11-07 00:25:29,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:25:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2020-11-07 00:25:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-07 00:25:29,867 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:29,868 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:29,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:25:29,868 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1677870744, now seen corresponding path program 4 times [2020-11-07 00:25:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:29,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144272564] [2020-11-07 00:25:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:29,996 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:30,125 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:30,127 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:30,128 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:25:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:25:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-11-07 00:25:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:30,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144272564] [2020-11-07 00:25:30,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:30,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:25:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316136479] [2020-11-07 00:25:30,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:25:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:25:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:25:30,311 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand 9 states. [2020-11-07 00:25:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:31,263 INFO L93 Difference]: Finished difference Result 408 states and 484 transitions. [2020-11-07 00:25:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:25:31,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2020-11-07 00:25:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:31,267 INFO L225 Difference]: With dead ends: 408 [2020-11-07 00:25:31,267 INFO L226 Difference]: Without dead ends: 269 [2020-11-07 00:25:31,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:25:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-11-07 00:25:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 213. [2020-11-07 00:25:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 00:25:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2020-11-07 00:25:31,323 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 134 [2020-11-07 00:25:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:31,324 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2020-11-07 00:25:31,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:25:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2020-11-07 00:25:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-07 00:25:31,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:31,327 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:31,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:25:31,327 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash 424633078, now seen corresponding path program 3 times [2020-11-07 00:25:31,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:31,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440904393] [2020-11-07 00:25:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:31,456 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:31,458 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:31,461 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-07 00:25:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:25:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-11-07 00:25:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:31,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440904393] [2020-11-07 00:25:31,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:31,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:25:31,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611647610] [2020-11-07 00:25:31,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:25:31,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:31,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:25:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:25:31,682 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand 9 states. [2020-11-07 00:25:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:32,701 INFO L93 Difference]: Finished difference Result 386 states and 462 transitions. [2020-11-07 00:25:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:25:32,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2020-11-07 00:25:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:32,708 INFO L225 Difference]: With dead ends: 386 [2020-11-07 00:25:32,708 INFO L226 Difference]: Without dead ends: 249 [2020-11-07 00:25:32,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:25:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-11-07 00:25:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 213. [2020-11-07 00:25:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-11-07 00:25:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2020-11-07 00:25:32,764 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 134 [2020-11-07 00:25:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:32,765 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2020-11-07 00:25:32,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:25:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2020-11-07 00:25:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 00:25:32,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:32,774 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 00:25:32,774 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2050515573, now seen corresponding path program 5 times [2020-11-07 00:25:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:32,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895774205] [2020-11-07 00:25:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:32,906 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:33,052 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:33,055 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:33,056 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-11-07 00:25:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:25:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:33,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895774205] [2020-11-07 00:25:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:33,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:25:33,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779170839] [2020-11-07 00:25:33,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:25:33,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:33,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:25:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:33,245 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand 10 states. [2020-11-07 00:25:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:34,405 INFO L93 Difference]: Finished difference Result 435 states and 517 transitions. [2020-11-07 00:25:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:25:34,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-11-07 00:25:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:34,409 INFO L225 Difference]: With dead ends: 435 [2020-11-07 00:25:34,409 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 00:25:34,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:25:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 00:25:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 223. [2020-11-07 00:25:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 00:25:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-11-07 00:25:34,457 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 139 [2020-11-07 00:25:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:34,458 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-11-07 00:25:34,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:25:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-11-07 00:25:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 00:25:34,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:34,460 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:34,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 00:25:34,460 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash 51988249, now seen corresponding path program 4 times [2020-11-07 00:25:34,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:34,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089074244] [2020-11-07 00:25:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:34,596 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:34,598 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:34,600 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-07 00:25:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-11-07 00:25:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:25:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:34,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089074244] [2020-11-07 00:25:34,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:34,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:25:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434272519] [2020-11-07 00:25:34,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:25:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:25:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:25:34,878 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 10 states. [2020-11-07 00:25:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:36,189 INFO L93 Difference]: Finished difference Result 405 states and 487 transitions. [2020-11-07 00:25:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:25:36,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 139 [2020-11-07 00:25:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:36,201 INFO L225 Difference]: With dead ends: 405 [2020-11-07 00:25:36,201 INFO L226 Difference]: Without dead ends: 263 [2020-11-07 00:25:36,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:25:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-11-07 00:25:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 223. [2020-11-07 00:25:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-11-07 00:25:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-11-07 00:25:36,247 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 139 [2020-11-07 00:25:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:36,247 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-11-07 00:25:36,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:25:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-11-07 00:25:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 00:25:36,249 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:36,249 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:36,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 00:25:36,250 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:36,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1639590072, now seen corresponding path program 6 times [2020-11-07 00:25:36,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:36,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694716576] [2020-11-07 00:25:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:36,523 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:36,525 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:36,527 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-11-07 00:25:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:25:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-07 00:25:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:36,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694716576] [2020-11-07 00:25:36,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:36,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:25:36,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347239697] [2020-11-07 00:25:36,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:25:36,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:36,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:25:36,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:25:36,768 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 11 states. [2020-11-07 00:25:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:38,003 INFO L93 Difference]: Finished difference Result 462 states and 550 transitions. [2020-11-07 00:25:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:25:38,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-07 00:25:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:38,007 INFO L225 Difference]: With dead ends: 462 [2020-11-07 00:25:38,008 INFO L226 Difference]: Without dead ends: 313 [2020-11-07 00:25:38,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:25:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-11-07 00:25:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 233. [2020-11-07 00:25:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 00:25:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 277 transitions. [2020-11-07 00:25:38,056 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 277 transitions. Word has length 144 [2020-11-07 00:25:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:38,056 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 277 transitions. [2020-11-07 00:25:38,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:25:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 277 transitions. [2020-11-07 00:25:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 00:25:38,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:38,058 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:38,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 00:25:38,058 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash 462913750, now seen corresponding path program 5 times [2020-11-07 00:25:38,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:38,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000372479] [2020-11-07 00:25:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:38,207 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:38,210 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:38,212 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-11-07 00:25:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-07 00:25:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-07 00:25:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:38,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000372479] [2020-11-07 00:25:38,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:38,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:25:38,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975362291] [2020-11-07 00:25:38,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:25:38,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:25:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:25:38,539 INFO L87 Difference]: Start difference. First operand 233 states and 277 transitions. Second operand 11 states. [2020-11-07 00:25:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:40,083 INFO L93 Difference]: Finished difference Result 424 states and 512 transitions. [2020-11-07 00:25:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:25:40,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2020-11-07 00:25:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:40,088 INFO L225 Difference]: With dead ends: 424 [2020-11-07 00:25:40,088 INFO L226 Difference]: Without dead ends: 277 [2020-11-07 00:25:40,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:25:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-11-07 00:25:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2020-11-07 00:25:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-11-07 00:25:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 277 transitions. [2020-11-07 00:25:40,137 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 277 transitions. Word has length 144 [2020-11-07 00:25:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:40,137 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 277 transitions. [2020-11-07 00:25:40,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:25:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 277 transitions. [2020-11-07 00:25:40,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-07 00:25:40,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:40,139 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:40,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 00:25:40,139 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1421399125, now seen corresponding path program 7 times [2020-11-07 00:25:40,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:40,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54628979] [2020-11-07 00:25:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:40,283 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:40,427 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:40,429 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:40,431 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-11-07 00:25:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-11-07 00:25:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-11-07 00:25:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:40,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54628979] [2020-11-07 00:25:40,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:40,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:25:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412620423] [2020-11-07 00:25:40,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:25:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:25:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:40,700 INFO L87 Difference]: Start difference. First operand 233 states and 277 transitions. Second operand 12 states. [2020-11-07 00:25:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:41,939 INFO L93 Difference]: Finished difference Result 489 states and 583 transitions. [2020-11-07 00:25:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:25:41,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-11-07 00:25:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:41,942 INFO L225 Difference]: With dead ends: 489 [2020-11-07 00:25:41,943 INFO L226 Difference]: Without dead ends: 335 [2020-11-07 00:25:41,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:25:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-11-07 00:25:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 243. [2020-11-07 00:25:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 00:25:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 290 transitions. [2020-11-07 00:25:41,992 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 290 transitions. Word has length 149 [2020-11-07 00:25:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:41,992 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 290 transitions. [2020-11-07 00:25:41,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:25:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 290 transitions. [2020-11-07 00:25:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-07 00:25:41,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:41,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:41,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 00:25:41,994 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash 681104697, now seen corresponding path program 6 times [2020-11-07 00:25:41,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:41,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923129512] [2020-11-07 00:25:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:42,164 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:42,167 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:42,168 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-11-07 00:25:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-11-07 00:25:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-11-07 00:25:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:42,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923129512] [2020-11-07 00:25:42,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:42,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:25:42,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508195855] [2020-11-07 00:25:42,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:25:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:25:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:42,479 INFO L87 Difference]: Start difference. First operand 243 states and 290 transitions. Second operand 12 states. [2020-11-07 00:25:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:44,245 INFO L93 Difference]: Finished difference Result 443 states and 537 transitions. [2020-11-07 00:25:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:25:44,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2020-11-07 00:25:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:44,251 INFO L225 Difference]: With dead ends: 443 [2020-11-07 00:25:44,251 INFO L226 Difference]: Without dead ends: 291 [2020-11-07 00:25:44,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:25:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-11-07 00:25:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 243. [2020-11-07 00:25:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-11-07 00:25:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 290 transitions. [2020-11-07 00:25:44,310 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 290 transitions. Word has length 149 [2020-11-07 00:25:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:44,311 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 290 transitions. [2020-11-07 00:25:44,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:25:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 290 transitions. [2020-11-07 00:25:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-07 00:25:44,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:44,313 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:44,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 00:25:44,313 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1763042008, now seen corresponding path program 8 times [2020-11-07 00:25:44,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:44,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377942563] [2020-11-07 00:25:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:44,571 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:44,573 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:44,574 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-11-07 00:25:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:25:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-11-07 00:25:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:44,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377942563] [2020-11-07 00:25:44,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:44,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:25:44,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781737159] [2020-11-07 00:25:44,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:25:44,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:25:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:25:44,840 INFO L87 Difference]: Start difference. First operand 243 states and 290 transitions. Second operand 13 states. [2020-11-07 00:25:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:46,418 INFO L93 Difference]: Finished difference Result 516 states and 616 transitions. [2020-11-07 00:25:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 00:25:46,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 154 [2020-11-07 00:25:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:46,421 INFO L225 Difference]: With dead ends: 516 [2020-11-07 00:25:46,421 INFO L226 Difference]: Without dead ends: 357 [2020-11-07 00:25:46,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:25:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-11-07 00:25:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 253. [2020-11-07 00:25:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 00:25:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2020-11-07 00:25:46,478 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 154 [2020-11-07 00:25:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:46,478 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2020-11-07 00:25:46,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:25:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2020-11-07 00:25:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-07 00:25:46,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:46,480 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:46,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 00:25:46,481 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash 339461814, now seen corresponding path program 7 times [2020-11-07 00:25:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:46,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234505279] [2020-11-07 00:25:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:46,636 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:46,638 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:46,643 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-11-07 00:25:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-11-07 00:25:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-11-07 00:25:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:46,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234505279] [2020-11-07 00:25:46,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:46,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:25:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286185909] [2020-11-07 00:25:46,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:25:46,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:25:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:25:46,975 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand 13 states. [2020-11-07 00:25:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:48,597 INFO L93 Difference]: Finished difference Result 462 states and 562 transitions. [2020-11-07 00:25:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 00:25:48,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 154 [2020-11-07 00:25:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:48,601 INFO L225 Difference]: With dead ends: 462 [2020-11-07 00:25:48,601 INFO L226 Difference]: Without dead ends: 305 [2020-11-07 00:25:48,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:25:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-11-07 00:25:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 253. [2020-11-07 00:25:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-11-07 00:25:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2020-11-07 00:25:48,663 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 154 [2020-11-07 00:25:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:48,665 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2020-11-07 00:25:48,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:25:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2020-11-07 00:25:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 00:25:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:48,667 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:48,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 00:25:48,668 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1245474357, now seen corresponding path program 9 times [2020-11-07 00:25:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:48,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510246411] [2020-11-07 00:25:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:48,805 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:48,947 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:48,949 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:48,951 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-11-07 00:25:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-11-07 00:25:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-07 00:25:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:49,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510246411] [2020-11-07 00:25:49,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:49,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:25:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93794415] [2020-11-07 00:25:49,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:25:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:25:49,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:49,249 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand 14 states. [2020-11-07 00:25:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:50,760 INFO L93 Difference]: Finished difference Result 543 states and 649 transitions. [2020-11-07 00:25:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:25:50,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-11-07 00:25:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:50,763 INFO L225 Difference]: With dead ends: 543 [2020-11-07 00:25:50,763 INFO L226 Difference]: Without dead ends: 379 [2020-11-07 00:25:50,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:25:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-11-07 00:25:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 263. [2020-11-07 00:25:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 00:25:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 316 transitions. [2020-11-07 00:25:50,832 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 316 transitions. Word has length 159 [2020-11-07 00:25:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:50,833 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 316 transitions. [2020-11-07 00:25:50,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:25:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 316 transitions. [2020-11-07 00:25:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-07 00:25:50,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:50,835 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:50,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 00:25:50,835 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:50,836 INFO L82 PathProgramCache]: Analyzing trace with hash 857029465, now seen corresponding path program 8 times [2020-11-07 00:25:50,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:50,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936369668] [2020-11-07 00:25:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:50,980 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:50,984 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:50,985 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-11-07 00:25:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-11-07 00:25:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-11-07 00:25:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936369668] [2020-11-07 00:25:51,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:51,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:25:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850335100] [2020-11-07 00:25:51,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:25:51,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:51,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:25:51,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:25:51,339 INFO L87 Difference]: Start difference. First operand 263 states and 316 transitions. Second operand 14 states. [2020-11-07 00:25:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:53,028 INFO L93 Difference]: Finished difference Result 481 states and 587 transitions. [2020-11-07 00:25:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:25:53,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2020-11-07 00:25:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:53,039 INFO L225 Difference]: With dead ends: 481 [2020-11-07 00:25:53,039 INFO L226 Difference]: Without dead ends: 319 [2020-11-07 00:25:53,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:25:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-11-07 00:25:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 263. [2020-11-07 00:25:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-07 00:25:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 316 transitions. [2020-11-07 00:25:53,101 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 316 transitions. Word has length 159 [2020-11-07 00:25:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:53,101 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 316 transitions. [2020-11-07 00:25:53,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:25:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 316 transitions. [2020-11-07 00:25:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-07 00:25:53,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:53,103 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:53,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 00:25:53,103 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:53,104 INFO L82 PathProgramCache]: Analyzing trace with hash -19363064, now seen corresponding path program 10 times [2020-11-07 00:25:53,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:53,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188760021] [2020-11-07 00:25:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:53,243 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:53,370 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:53,372 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:53,374 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 00:25:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-11-07 00:25:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-11-07 00:25:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:53,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188760021] [2020-11-07 00:25:53,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:53,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:25:53,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037034572] [2020-11-07 00:25:53,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:25:53,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:53,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:25:53,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:25:53,694 INFO L87 Difference]: Start difference. First operand 263 states and 316 transitions. Second operand 15 states. [2020-11-07 00:25:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:55,602 INFO L93 Difference]: Finished difference Result 570 states and 682 transitions. [2020-11-07 00:25:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:25:55,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 164 [2020-11-07 00:25:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:55,606 INFO L225 Difference]: With dead ends: 570 [2020-11-07 00:25:55,606 INFO L226 Difference]: Without dead ends: 401 [2020-11-07 00:25:55,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:25:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-11-07 00:25:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 273. [2020-11-07 00:25:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 00:25:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 329 transitions. [2020-11-07 00:25:55,671 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 329 transitions. Word has length 164 [2020-11-07 00:25:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:55,672 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 329 transitions. [2020-11-07 00:25:55,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:25:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 329 transitions. [2020-11-07 00:25:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-07 00:25:55,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:55,673 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:55,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 00:25:55,674 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2083140758, now seen corresponding path program 9 times [2020-11-07 00:25:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:55,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116981375] [2020-11-07 00:25:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:55,816 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:55,818 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:55,819 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:55,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:56,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 00:25:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:56,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-11-07 00:25:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:56,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-11-07 00:25:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:25:56,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116981375] [2020-11-07 00:25:56,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:56,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:25:56,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989823160] [2020-11-07 00:25:56,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:25:56,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:25:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:25:56,204 INFO L87 Difference]: Start difference. First operand 273 states and 329 transitions. Second operand 15 states. [2020-11-07 00:25:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:58,708 INFO L93 Difference]: Finished difference Result 500 states and 612 transitions. [2020-11-07 00:25:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:25:58,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 164 [2020-11-07 00:25:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:58,713 INFO L225 Difference]: With dead ends: 500 [2020-11-07 00:25:58,713 INFO L226 Difference]: Without dead ends: 333 [2020-11-07 00:25:58,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:25:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-11-07 00:25:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 273. [2020-11-07 00:25:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-11-07 00:25:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 329 transitions. [2020-11-07 00:25:58,785 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 329 transitions. Word has length 164 [2020-11-07 00:25:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:58,785 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 329 transitions. [2020-11-07 00:25:58,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:25:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 329 transitions. [2020-11-07 00:25:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 00:25:58,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:58,787 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:25:58,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 00:25:58,787 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1861300245, now seen corresponding path program 11 times [2020-11-07 00:25:58,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:58,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231008296] [2020-11-07 00:25:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:58,948 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:59,086 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:25:59,088 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:25:59,090 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:25:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:25:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-11-07 00:25:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-11-07 00:25:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-11-07 00:25:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:25:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231008296] [2020-11-07 00:25:59,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:25:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455687762] [2020-11-07 00:25:59,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:25:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:25:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:25:59,421 INFO L87 Difference]: Start difference. First operand 273 states and 329 transitions. Second operand 16 states. [2020-11-07 00:26:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:01,442 INFO L93 Difference]: Finished difference Result 597 states and 715 transitions. [2020-11-07 00:26:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:26:01,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 169 [2020-11-07 00:26:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:01,448 INFO L225 Difference]: With dead ends: 597 [2020-11-07 00:26:01,448 INFO L226 Difference]: Without dead ends: 423 [2020-11-07 00:26:01,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:26:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-11-07 00:26:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 283. [2020-11-07 00:26:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 00:26:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2020-11-07 00:26:01,522 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 169 [2020-11-07 00:26:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:01,522 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2020-11-07 00:26:01,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:26:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2020-11-07 00:26:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 00:26:01,524 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:01,524 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:01,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 00:26:01,524 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash 241203577, now seen corresponding path program 10 times [2020-11-07 00:26:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:01,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747091607] [2020-11-07 00:26:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:01,661 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:01,663 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:01,665 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:01,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-11-07 00:26:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:02,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-11-07 00:26:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:02,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-11-07 00:26:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747091607] [2020-11-07 00:26:02,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:02,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:26:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188936816] [2020-11-07 00:26:02,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:26:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:26:02,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:26:02,115 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand 16 states. [2020-11-07 00:26:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:04,348 INFO L93 Difference]: Finished difference Result 519 states and 637 transitions. [2020-11-07 00:26:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:26:04,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 169 [2020-11-07 00:26:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:04,350 INFO L225 Difference]: With dead ends: 519 [2020-11-07 00:26:04,351 INFO L226 Difference]: Without dead ends: 347 [2020-11-07 00:26:04,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:26:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-07 00:26:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 283. [2020-11-07 00:26:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-11-07 00:26:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 342 transitions. [2020-11-07 00:26:04,429 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 342 transitions. Word has length 169 [2020-11-07 00:26:04,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:04,429 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 342 transitions. [2020-11-07 00:26:04,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:26:04,429 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 342 transitions. [2020-11-07 00:26:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-07 00:26:04,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:04,431 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:04,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 00:26:04,431 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2105483496, now seen corresponding path program 12 times [2020-11-07 00:26:04,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:04,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58681222] [2020-11-07 00:26:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:04,590 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:04,732 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:04,734 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:04,735 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:04,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-11-07 00:26:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:05,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-11-07 00:26:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:05,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 00:26:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:05,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58681222] [2020-11-07 00:26:05,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:05,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:26:05,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414603464] [2020-11-07 00:26:05,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:26:05,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:05,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:26:05,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:05,076 INFO L87 Difference]: Start difference. First operand 283 states and 342 transitions. Second operand 17 states. [2020-11-07 00:26:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:07,313 INFO L93 Difference]: Finished difference Result 624 states and 748 transitions. [2020-11-07 00:26:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:26:07,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 174 [2020-11-07 00:26:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:07,316 INFO L225 Difference]: With dead ends: 624 [2020-11-07 00:26:07,316 INFO L226 Difference]: Without dead ends: 445 [2020-11-07 00:26:07,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:26:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-11-07 00:26:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 293. [2020-11-07 00:26:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 00:26:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2020-11-07 00:26:07,396 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 174 [2020-11-07 00:26:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:07,396 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2020-11-07 00:26:07,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:26:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2020-11-07 00:26:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-07 00:26:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:07,398 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:07,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 00:26:07,399 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -86979978, now seen corresponding path program 11 times [2020-11-07 00:26:07,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:07,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54203852] [2020-11-07 00:26:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:07,546 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:07,547 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:07,548 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-11-07 00:26:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-11-07 00:26:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 00:26:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:07,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54203852] [2020-11-07 00:26:07,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:07,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:26:07,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830704321] [2020-11-07 00:26:07,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:26:07,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:26:07,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:26:07,992 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand 17 states. [2020-11-07 00:26:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:10,497 INFO L93 Difference]: Finished difference Result 538 states and 662 transitions. [2020-11-07 00:26:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 00:26:10,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 174 [2020-11-07 00:26:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:10,501 INFO L225 Difference]: With dead ends: 538 [2020-11-07 00:26:10,501 INFO L226 Difference]: Without dead ends: 361 [2020-11-07 00:26:10,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-11-07 00:26:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-11-07 00:26:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 293. [2020-11-07 00:26:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-11-07 00:26:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 355 transitions. [2020-11-07 00:26:10,578 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 355 transitions. Word has length 174 [2020-11-07 00:26:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:10,579 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 355 transitions. [2020-11-07 00:26:10,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:26:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 355 transitions. [2020-11-07 00:26:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 00:26:10,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:10,581 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:10,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 00:26:10,581 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash 175826443, now seen corresponding path program 13 times [2020-11-07 00:26:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:10,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876201492] [2020-11-07 00:26:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:10,733 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:10,884 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:10,885 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:10,887 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:10,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-11-07 00:26:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-11-07 00:26:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 00:26:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:11,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876201492] [2020-11-07 00:26:11,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:11,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:11,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740658922] [2020-11-07 00:26:11,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:11,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=169, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:11,262 INFO L87 Difference]: Start difference. First operand 293 states and 355 transitions. Second operand 18 states. [2020-11-07 00:26:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:12,929 INFO L93 Difference]: Finished difference Result 651 states and 781 transitions. [2020-11-07 00:26:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:26:12,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 179 [2020-11-07 00:26:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:12,937 INFO L225 Difference]: With dead ends: 651 [2020-11-07 00:26:12,938 INFO L226 Difference]: Without dead ends: 467 [2020-11-07 00:26:12,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:26:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-11-07 00:26:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 303. [2020-11-07 00:26:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 00:26:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2020-11-07 00:26:13,009 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 179 [2020-11-07 00:26:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:13,010 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2020-11-07 00:26:13,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2020-11-07 00:26:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-11-07 00:26:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:13,012 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:13,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 00:26:13,012 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2016637031, now seen corresponding path program 12 times [2020-11-07 00:26:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:13,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59902432] [2020-11-07 00:26:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:13,174 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:13,176 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:13,178 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-11-07 00:26:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-11-07 00:26:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-11-07 00:26:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:13,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59902432] [2020-11-07 00:26:13,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:13,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:26:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118473416] [2020-11-07 00:26:13,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:26:13,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:26:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:26:13,742 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand 18 states. [2020-11-07 00:26:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:17,265 INFO L93 Difference]: Finished difference Result 557 states and 687 transitions. [2020-11-07 00:26:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:26:17,271 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 179 [2020-11-07 00:26:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:17,273 INFO L225 Difference]: With dead ends: 557 [2020-11-07 00:26:17,273 INFO L226 Difference]: Without dead ends: 375 [2020-11-07 00:26:17,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:26:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-11-07 00:26:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2020-11-07 00:26:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-11-07 00:26:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 368 transitions. [2020-11-07 00:26:17,363 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 368 transitions. Word has length 179 [2020-11-07 00:26:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:17,364 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 368 transitions. [2020-11-07 00:26:17,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:26:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 368 transitions. [2020-11-07 00:26:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-11-07 00:26:17,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:17,366 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:17,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 00:26:17,366 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash -926163256, now seen corresponding path program 14 times [2020-11-07 00:26:17,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:17,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159044375] [2020-11-07 00:26:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:17,524 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:17,671 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:17,673 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:17,675 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:17,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-11-07 00:26:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-11-07 00:26:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:18,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-11-07 00:26:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:18,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159044375] [2020-11-07 00:26:18,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:18,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 00:26:18,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811415425] [2020-11-07 00:26:18,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 00:26:18,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 00:26:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:26:18,074 INFO L87 Difference]: Start difference. First operand 303 states and 368 transitions. Second operand 19 states. [2020-11-07 00:26:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:20,766 INFO L93 Difference]: Finished difference Result 678 states and 814 transitions. [2020-11-07 00:26:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:26:20,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 184 [2020-11-07 00:26:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:20,769 INFO L225 Difference]: With dead ends: 678 [2020-11-07 00:26:20,770 INFO L226 Difference]: Without dead ends: 489 [2020-11-07 00:26:20,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:26:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-11-07 00:26:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 313. [2020-11-07 00:26:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 00:26:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 381 transitions. [2020-11-07 00:26:20,856 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 381 transitions. Word has length 184 [2020-11-07 00:26:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:20,857 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 381 transitions. [2020-11-07 00:26:20,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 00:26:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 381 transitions. [2020-11-07 00:26:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-11-07 00:26:20,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:20,859 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:20,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 00:26:20,859 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1176340566, now seen corresponding path program 13 times [2020-11-07 00:26:20,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:20,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361681682] [2020-11-07 00:26:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:21,022 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:21,024 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:21,026 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-11-07 00:26:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-11-07 00:26:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-11-07 00:26:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:21,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361681682] [2020-11-07 00:26:21,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:21,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 00:26:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268148557] [2020-11-07 00:26:21,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 00:26:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 00:26:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-11-07 00:26:21,573 INFO L87 Difference]: Start difference. First operand 313 states and 381 transitions. Second operand 19 states. [2020-11-07 00:26:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:24,859 INFO L93 Difference]: Finished difference Result 576 states and 712 transitions. [2020-11-07 00:26:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-07 00:26:24,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 184 [2020-11-07 00:26:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:24,866 INFO L225 Difference]: With dead ends: 576 [2020-11-07 00:26:24,867 INFO L226 Difference]: Without dead ends: 389 [2020-11-07 00:26:24,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-11-07 00:26:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-11-07 00:26:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 313. [2020-11-07 00:26:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 00:26:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 381 transitions. [2020-11-07 00:26:24,955 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 381 transitions. Word has length 184 [2020-11-07 00:26:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:24,955 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 381 transitions. [2020-11-07 00:26:24,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 00:26:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 381 transitions. [2020-11-07 00:26:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 00:26:24,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:24,957 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:24,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 00:26:24,958 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -254159829, now seen corresponding path program 15 times [2020-11-07 00:26:24,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:24,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404308118] [2020-11-07 00:26:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:25,119 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:25,271 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:25,272 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:25,274 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-11-07 00:26:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-11-07 00:26:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-11-07 00:26:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:25,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404308118] [2020-11-07 00:26:25,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:25,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:26:25,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044166650] [2020-11-07 00:26:25,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:26:25,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:26:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:26:25,755 INFO L87 Difference]: Start difference. First operand 313 states and 381 transitions. Second operand 20 states. [2020-11-07 00:26:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:28,429 INFO L93 Difference]: Finished difference Result 705 states and 847 transitions. [2020-11-07 00:26:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:28,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 00:26:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:28,432 INFO L225 Difference]: With dead ends: 705 [2020-11-07 00:26:28,433 INFO L226 Difference]: Without dead ends: 511 [2020-11-07 00:26:28,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:26:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-11-07 00:26:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 323. [2020-11-07 00:26:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 00:26:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 394 transitions. [2020-11-07 00:26:28,529 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 394 transitions. Word has length 189 [2020-11-07 00:26:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:28,530 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 394 transitions. [2020-11-07 00:26:28,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:26:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 394 transitions. [2020-11-07 00:26:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-07 00:26:28,532 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:28,532 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:28,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 00:26:28,532 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1848343993, now seen corresponding path program 14 times [2020-11-07 00:26:28,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:28,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714196976] [2020-11-07 00:26:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:28,717 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:28,721 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:28,722 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:28,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:29,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-11-07 00:26:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:29,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-11-07 00:26:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:29,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-11-07 00:26:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:29,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714196976] [2020-11-07 00:26:29,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:29,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:26:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493194899] [2020-11-07 00:26:29,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:26:29,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:26:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:26:29,363 INFO L87 Difference]: Start difference. First operand 323 states and 394 transitions. Second operand 20 states. [2020-11-07 00:26:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:33,240 INFO L93 Difference]: Finished difference Result 595 states and 737 transitions. [2020-11-07 00:26:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 00:26:33,241 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-11-07 00:26:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:33,243 INFO L225 Difference]: With dead ends: 595 [2020-11-07 00:26:33,244 INFO L226 Difference]: Without dead ends: 403 [2020-11-07 00:26:33,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2020-11-07 00:26:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-07 00:26:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 323. [2020-11-07 00:26:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-07 00:26:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 394 transitions. [2020-11-07 00:26:33,337 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 394 transitions. Word has length 189 [2020-11-07 00:26:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:33,338 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 394 transitions. [2020-11-07 00:26:33,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:26:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 394 transitions. [2020-11-07 00:26:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-07 00:26:33,341 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:33,341 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:33,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 00:26:33,341 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2060663640, now seen corresponding path program 16 times [2020-11-07 00:26:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:33,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218425809] [2020-11-07 00:26:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:33,512 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:33,668 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:33,670 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:33,671 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:33,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-11-07 00:26:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-11-07 00:26:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-11-07 00:26:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:34,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218425809] [2020-11-07 00:26:34,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:34,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646779520] [2020-11-07 00:26:34,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=229, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:34,152 INFO L87 Difference]: Start difference. First operand 323 states and 394 transitions. Second operand 21 states. [2020-11-07 00:26:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:37,289 INFO L93 Difference]: Finished difference Result 732 states and 880 transitions. [2020-11-07 00:26:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:26:37,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2020-11-07 00:26:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:37,293 INFO L225 Difference]: With dead ends: 732 [2020-11-07 00:26:37,293 INFO L226 Difference]: Without dead ends: 533 [2020-11-07 00:26:37,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:26:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-11-07 00:26:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 333. [2020-11-07 00:26:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 00:26:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 407 transitions. [2020-11-07 00:26:37,379 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 407 transitions. Word has length 194 [2020-11-07 00:26:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:37,379 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 407 transitions. [2020-11-07 00:26:37,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 407 transitions. [2020-11-07 00:26:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-07 00:26:37,380 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:37,380 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:37,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 00:26:37,381 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 41840182, now seen corresponding path program 15 times [2020-11-07 00:26:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:37,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472571492] [2020-11-07 00:26:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:37,532 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:37,534 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:37,535 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:37,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-11-07 00:26:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-11-07 00:26:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-11-07 00:26:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:38,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472571492] [2020-11-07 00:26:38,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:38,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 00:26:38,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339078072] [2020-11-07 00:26:38,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 00:26:38,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:38,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 00:26:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:26:38,154 INFO L87 Difference]: Start difference. First operand 333 states and 407 transitions. Second operand 21 states. [2020-11-07 00:26:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:41,765 INFO L93 Difference]: Finished difference Result 614 states and 762 transitions. [2020-11-07 00:26:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:26:41,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 194 [2020-11-07 00:26:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:41,769 INFO L225 Difference]: With dead ends: 614 [2020-11-07 00:26:41,769 INFO L226 Difference]: Without dead ends: 417 [2020-11-07 00:26:41,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:26:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-07 00:26:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 333. [2020-11-07 00:26:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-11-07 00:26:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 407 transitions. [2020-11-07 00:26:41,847 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 407 transitions. Word has length 194 [2020-11-07 00:26:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:41,848 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 407 transitions. [2020-11-07 00:26:41,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 00:26:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 407 transitions. [2020-11-07 00:26:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 00:26:41,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:41,850 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:41,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 00:26:41,850 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash 880646731, now seen corresponding path program 17 times [2020-11-07 00:26:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:41,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492807330] [2020-11-07 00:26:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:42,026 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:42,188 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:42,190 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:42,192 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-11-07 00:26:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-11-07 00:26:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 00:26:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:42,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492807330] [2020-11-07 00:26:42,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:42,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:26:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295626375] [2020-11-07 00:26:42,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:26:42,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:26:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=251, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:26:42,723 INFO L87 Difference]: Start difference. First operand 333 states and 407 transitions. Second operand 22 states. [2020-11-07 00:26:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:45,948 INFO L93 Difference]: Finished difference Result 759 states and 913 transitions. [2020-11-07 00:26:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:26:45,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 199 [2020-11-07 00:26:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:45,952 INFO L225 Difference]: With dead ends: 759 [2020-11-07 00:26:45,952 INFO L226 Difference]: Without dead ends: 555 [2020-11-07 00:26:45,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:26:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-11-07 00:26:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 343. [2020-11-07 00:26:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 00:26:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 420 transitions. [2020-11-07 00:26:46,065 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 420 transitions. Word has length 199 [2020-11-07 00:26:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:46,066 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 420 transitions. [2020-11-07 00:26:46,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:26:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 420 transitions. [2020-11-07 00:26:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 00:26:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:46,068 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:46,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 00:26:46,068 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1311816743, now seen corresponding path program 16 times [2020-11-07 00:26:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:46,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725602551] [2020-11-07 00:26:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:46,264 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:46,266 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:46,267 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-11-07 00:26:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-11-07 00:26:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-11-07 00:26:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:46,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725602551] [2020-11-07 00:26:46,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:46,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:26:46,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58162346] [2020-11-07 00:26:46,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:26:46,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:26:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:26:46,941 INFO L87 Difference]: Start difference. First operand 343 states and 420 transitions. Second operand 22 states. [2020-11-07 00:26:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:52,111 INFO L93 Difference]: Finished difference Result 633 states and 787 transitions. [2020-11-07 00:26:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:26:52,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 199 [2020-11-07 00:26:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:52,116 INFO L225 Difference]: With dead ends: 633 [2020-11-07 00:26:52,116 INFO L226 Difference]: Without dead ends: 431 [2020-11-07 00:26:52,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 00:26:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-07 00:26:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 343. [2020-11-07 00:26:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-07 00:26:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 420 transitions. [2020-11-07 00:26:52,220 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 420 transitions. Word has length 199 [2020-11-07 00:26:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:52,220 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 420 transitions. [2020-11-07 00:26:52,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:26:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 420 transitions. [2020-11-07 00:26:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-07 00:26:52,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:52,222 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:52,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 00:26:52,222 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:52,223 INFO L82 PathProgramCache]: Analyzing trace with hash 630182536, now seen corresponding path program 18 times [2020-11-07 00:26:52,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:52,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616078505] [2020-11-07 00:26:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:52,392 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:52,558 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:52,559 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:52,561 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:52,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:53,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-11-07 00:26:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:53,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-11-07 00:26:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:53,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-11-07 00:26:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:26:53,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616078505] [2020-11-07 00:26:53,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:53,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:26:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932892316] [2020-11-07 00:26:53,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:26:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:26:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:26:53,104 INFO L87 Difference]: Start difference. First operand 343 states and 420 transitions. Second operand 23 states. [2020-11-07 00:26:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:26:55,568 INFO L93 Difference]: Finished difference Result 786 states and 946 transitions. [2020-11-07 00:26:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:26:55,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 204 [2020-11-07 00:26:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:26:55,572 INFO L225 Difference]: With dead ends: 786 [2020-11-07 00:26:55,572 INFO L226 Difference]: Without dead ends: 577 [2020-11-07 00:26:55,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:26:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-11-07 00:26:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 353. [2020-11-07 00:26:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-11-07 00:26:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 433 transitions. [2020-11-07 00:26:55,667 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 433 transitions. Word has length 204 [2020-11-07 00:26:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:26:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 433 transitions. [2020-11-07 00:26:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:26:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 433 transitions. [2020-11-07 00:26:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-07 00:26:55,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:26:55,670 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:26:55,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 00:26:55,670 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:26:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:26:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1562280938, now seen corresponding path program 17 times [2020-11-07 00:26:55,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:26:55,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034430080] [2020-11-07 00:26:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:26:55,870 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:26:55,872 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:26:55,874 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:26:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:55,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:26:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:55,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:26:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:26:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-11-07 00:26:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-11-07 00:26:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-11-07 00:26:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:26:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:26:56,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034430080] [2020-11-07 00:26:56,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:26:56,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 00:26:56,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116657533] [2020-11-07 00:26:56,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 00:26:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:26:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 00:26:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-07 00:26:56,606 INFO L87 Difference]: Start difference. First operand 353 states and 433 transitions. Second operand 23 states. [2020-11-07 00:27:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:02,180 INFO L93 Difference]: Finished difference Result 652 states and 812 transitions. [2020-11-07 00:27:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 00:27:02,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 204 [2020-11-07 00:27:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:02,185 INFO L225 Difference]: With dead ends: 652 [2020-11-07 00:27:02,185 INFO L226 Difference]: Without dead ends: 445 [2020-11-07 00:27:02,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 00:27:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-11-07 00:27:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 353. [2020-11-07 00:27:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-11-07 00:27:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 433 transitions. [2020-11-07 00:27:02,281 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 433 transitions. Word has length 204 [2020-11-07 00:27:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:02,281 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 433 transitions. [2020-11-07 00:27:02,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 00:27:02,281 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 433 transitions. [2020-11-07 00:27:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-11-07 00:27:02,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:02,283 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:02,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 00:27:02,283 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:02,284 INFO L82 PathProgramCache]: Analyzing trace with hash 121124971, now seen corresponding path program 19 times [2020-11-07 00:27:02,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:02,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329743749] [2020-11-07 00:27:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:02,468 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:02,634 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:02,635 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:02,637 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:02,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-11-07 00:27:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-11-07 00:27:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-11-07 00:27:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329743749] [2020-11-07 00:27:03,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:03,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:27:03,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330667055] [2020-11-07 00:27:03,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:27:03,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:27:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:27:03,350 INFO L87 Difference]: Start difference. First operand 353 states and 433 transitions. Second operand 24 states. [2020-11-07 00:27:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:06,218 INFO L93 Difference]: Finished difference Result 813 states and 979 transitions. [2020-11-07 00:27:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:27:06,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-11-07 00:27:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:06,222 INFO L225 Difference]: With dead ends: 813 [2020-11-07 00:27:06,222 INFO L226 Difference]: Without dead ends: 599 [2020-11-07 00:27:06,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:27:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-11-07 00:27:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 363. [2020-11-07 00:27:06,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-11-07 00:27:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 446 transitions. [2020-11-07 00:27:06,315 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 446 transitions. Word has length 209 [2020-11-07 00:27:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:06,315 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 446 transitions. [2020-11-07 00:27:06,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:27:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 446 transitions. [2020-11-07 00:27:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-11-07 00:27:06,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:06,317 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:06,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 00:27:06,317 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2071338503, now seen corresponding path program 18 times [2020-11-07 00:27:06,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:06,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129798295] [2020-11-07 00:27:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:06,513 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:06,515 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:06,517 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:06,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-11-07 00:27:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-11-07 00:27:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-11-07 00:27:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:07,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129798295] [2020-11-07 00:27:07,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:07,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:27:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507661610] [2020-11-07 00:27:07,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:27:07,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:07,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:27:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:27:07,360 INFO L87 Difference]: Start difference. First operand 363 states and 446 transitions. Second operand 24 states. [2020-11-07 00:27:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:13,521 INFO L93 Difference]: Finished difference Result 671 states and 837 transitions. [2020-11-07 00:27:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:27:13,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-11-07 00:27:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:13,526 INFO L225 Difference]: With dead ends: 671 [2020-11-07 00:27:13,527 INFO L226 Difference]: Without dead ends: 459 [2020-11-07 00:27:13,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2020-11-07 00:27:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-11-07 00:27:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 363. [2020-11-07 00:27:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-11-07 00:27:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 446 transitions. [2020-11-07 00:27:13,625 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 446 transitions. Word has length 209 [2020-11-07 00:27:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:13,625 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 446 transitions. [2020-11-07 00:27:13,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:27:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 446 transitions. [2020-11-07 00:27:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 00:27:13,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:13,627 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:13,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 00:27:13,627 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:13,628 INFO L82 PathProgramCache]: Analyzing trace with hash -882702232, now seen corresponding path program 20 times [2020-11-07 00:27:13,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:13,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579390572] [2020-11-07 00:27:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:13,816 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:13,991 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:13,992 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:13,993 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-11-07 00:27:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-11-07 00:27:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-11-07 00:27:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:14,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579390572] [2020-11-07 00:27:14,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:14,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:27:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878085710] [2020-11-07 00:27:14,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:27:14,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:14,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:27:14,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=323, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:27:14,620 INFO L87 Difference]: Start difference. First operand 363 states and 446 transitions. Second operand 25 states. [2020-11-07 00:27:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:17,539 INFO L93 Difference]: Finished difference Result 840 states and 1012 transitions. [2020-11-07 00:27:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:27:17,540 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2020-11-07 00:27:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:17,552 INFO L225 Difference]: With dead ends: 840 [2020-11-07 00:27:17,552 INFO L226 Difference]: Without dead ends: 621 [2020-11-07 00:27:17,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 00:27:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-11-07 00:27:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 373. [2020-11-07 00:27:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-11-07 00:27:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 459 transitions. [2020-11-07 00:27:17,672 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 459 transitions. Word has length 214 [2020-11-07 00:27:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:17,673 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 459 transitions. [2020-11-07 00:27:17,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:27:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 459 transitions. [2020-11-07 00:27:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-07 00:27:17,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:17,675 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:17,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 00:27:17,675 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1219801590, now seen corresponding path program 19 times [2020-11-07 00:27:17,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192725799] [2020-11-07 00:27:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:17,898 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:17,900 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:17,901 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:17,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:17,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:18,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-11-07 00:27:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:18,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-11-07 00:27:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:18,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-11-07 00:27:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192725799] [2020-11-07 00:27:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 00:27:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566468572] [2020-11-07 00:27:18,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 00:27:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 00:27:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:27:18,824 INFO L87 Difference]: Start difference. First operand 373 states and 459 transitions. Second operand 25 states. [2020-11-07 00:27:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:24,215 INFO L93 Difference]: Finished difference Result 690 states and 862 transitions. [2020-11-07 00:27:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-07 00:27:24,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 214 [2020-11-07 00:27:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:24,220 INFO L225 Difference]: With dead ends: 690 [2020-11-07 00:27:24,220 INFO L226 Difference]: Without dead ends: 473 [2020-11-07 00:27:24,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 00:27:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-11-07 00:27:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 373. [2020-11-07 00:27:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-11-07 00:27:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 459 transitions. [2020-11-07 00:27:24,325 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 459 transitions. Word has length 214 [2020-11-07 00:27:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:24,326 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 459 transitions. [2020-11-07 00:27:24,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 00:27:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 459 transitions. [2020-11-07 00:27:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 00:27:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:24,328 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:24,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 00:27:24,329 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash -61100405, now seen corresponding path program 21 times [2020-11-07 00:27:24,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:24,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640781263] [2020-11-07 00:27:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:24,581 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:24,787 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:24,789 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:24,790 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:24,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:24,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:24,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-11-07 00:27:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:25,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-11-07 00:27:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-11-07 00:27:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:25,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640781263] [2020-11-07 00:27:25,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:25,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:27:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668743493] [2020-11-07 00:27:25,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:27:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:27:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:27:25,477 INFO L87 Difference]: Start difference. First operand 373 states and 459 transitions. Second operand 26 states. [2020-11-07 00:27:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:29,244 INFO L93 Difference]: Finished difference Result 867 states and 1045 transitions. [2020-11-07 00:27:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:29,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 00:27:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:29,248 INFO L225 Difference]: With dead ends: 867 [2020-11-07 00:27:29,248 INFO L226 Difference]: Without dead ends: 643 [2020-11-07 00:27:29,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:27:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-11-07 00:27:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 383. [2020-11-07 00:27:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-07 00:27:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 472 transitions. [2020-11-07 00:27:29,350 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 472 transitions. Word has length 219 [2020-11-07 00:27:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:29,351 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 472 transitions. [2020-11-07 00:27:29,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:27:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 472 transitions. [2020-11-07 00:27:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 00:27:29,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:29,353 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:29,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 00:27:29,353 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:29,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2041403417, now seen corresponding path program 20 times [2020-11-07 00:27:29,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:29,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546133994] [2020-11-07 00:27:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:29,578 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:29,580 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:29,581 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:29,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-11-07 00:27:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-11-07 00:27:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-11-07 00:27:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:30,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546133994] [2020-11-07 00:27:30,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:30,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-11-07 00:27:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587397888] [2020-11-07 00:27:30,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-07 00:27:30,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-07 00:27:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-11-07 00:27:30,624 INFO L87 Difference]: Start difference. First operand 383 states and 472 transitions. Second operand 26 states. [2020-11-07 00:27:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:37,270 INFO L93 Difference]: Finished difference Result 709 states and 887 transitions. [2020-11-07 00:27:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 00:27:37,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-11-07 00:27:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:37,275 INFO L225 Difference]: With dead ends: 709 [2020-11-07 00:27:37,275 INFO L226 Difference]: Without dead ends: 487 [2020-11-07 00:27:37,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:27:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-11-07 00:27:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2020-11-07 00:27:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-07 00:27:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 472 transitions. [2020-11-07 00:27:37,380 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 472 transitions. Word has length 219 [2020-11-07 00:27:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:37,380 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 472 transitions. [2020-11-07 00:27:37,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-07 00:27:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 472 transitions. [2020-11-07 00:27:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-07 00:27:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:37,382 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:37,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 00:27:37,382 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash 647259720, now seen corresponding path program 22 times [2020-11-07 00:27:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:37,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479125234] [2020-11-07 00:27:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:37,586 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:37,790 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:37,791 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:37,792 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:37,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-11-07 00:27:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-11-07 00:27:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:38,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-11-07 00:27:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:38,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479125234] [2020-11-07 00:27:38,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:38,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:27:38,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476319445] [2020-11-07 00:27:38,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:27:38,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:27:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:27:38,509 INFO L87 Difference]: Start difference. First operand 383 states and 472 transitions. Second operand 27 states. [2020-11-07 00:27:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:41,818 INFO L93 Difference]: Finished difference Result 894 states and 1078 transitions. [2020-11-07 00:27:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:27:41,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 224 [2020-11-07 00:27:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:41,823 INFO L225 Difference]: With dead ends: 894 [2020-11-07 00:27:41,823 INFO L226 Difference]: Without dead ends: 665 [2020-11-07 00:27:41,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:27:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-11-07 00:27:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 393. [2020-11-07 00:27:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-11-07 00:27:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 485 transitions. [2020-11-07 00:27:41,932 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 485 transitions. Word has length 224 [2020-11-07 00:27:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:41,932 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 485 transitions. [2020-11-07 00:27:41,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:27:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 485 transitions. [2020-11-07 00:27:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-07 00:27:41,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:41,933 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:41,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 00:27:41,934 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1545203754, now seen corresponding path program 21 times [2020-11-07 00:27:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:41,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550921830] [2020-11-07 00:27:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:42,145 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:42,146 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:42,147 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:42,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-11-07 00:27:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-11-07 00:27:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-11-07 00:27:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:43,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550921830] [2020-11-07 00:27:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 00:27:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547678899] [2020-11-07 00:27:43,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 00:27:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 00:27:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2020-11-07 00:27:43,147 INFO L87 Difference]: Start difference. First operand 393 states and 485 transitions. Second operand 27 states. [2020-11-07 00:27:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:51,418 INFO L93 Difference]: Finished difference Result 728 states and 912 transitions. [2020-11-07 00:27:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:27:51,421 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 224 [2020-11-07 00:27:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:51,424 INFO L225 Difference]: With dead ends: 728 [2020-11-07 00:27:51,424 INFO L226 Difference]: Without dead ends: 501 [2020-11-07 00:27:51,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2020-11-07 00:27:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-11-07 00:27:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2020-11-07 00:27:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-11-07 00:27:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 485 transitions. [2020-11-07 00:27:51,535 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 485 transitions. Word has length 224 [2020-11-07 00:27:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:51,535 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 485 transitions. [2020-11-07 00:27:51,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 00:27:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 485 transitions. [2020-11-07 00:27:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 00:27:51,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:51,537 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:51,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 00:27:51,537 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash 683277483, now seen corresponding path program 23 times [2020-11-07 00:27:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:51,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381997486] [2020-11-07 00:27:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:51,749 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:51,964 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:51,966 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:51,967 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-11-07 00:27:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-11-07 00:27:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-11-07 00:27:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:27:52,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381997486] [2020-11-07 00:27:52,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:52,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:27:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053480061] [2020-11-07 00:27:52,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:27:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:27:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=404, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:27:52,783 INFO L87 Difference]: Start difference. First operand 393 states and 485 transitions. Second operand 28 states. [2020-11-07 00:27:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:27:56,461 INFO L93 Difference]: Finished difference Result 921 states and 1111 transitions. [2020-11-07 00:27:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 00:27:56,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 229 [2020-11-07 00:27:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:27:56,465 INFO L225 Difference]: With dead ends: 921 [2020-11-07 00:27:56,465 INFO L226 Difference]: Without dead ends: 687 [2020-11-07 00:27:56,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:27:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-11-07 00:27:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 403. [2020-11-07 00:27:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 00:27:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 498 transitions. [2020-11-07 00:27:56,567 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 498 transitions. Word has length 229 [2020-11-07 00:27:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:27:56,567 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 498 transitions. [2020-11-07 00:27:56,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:27:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 498 transitions. [2020-11-07 00:27:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 00:27:56,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:27:56,569 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:27:56,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 00:27:56,569 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:27:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:27:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1509185991, now seen corresponding path program 22 times [2020-11-07 00:27:56,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:27:56,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307056606] [2020-11-07 00:27:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:27:56,767 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:27:56,768 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:27:56,769 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:27:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:27:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:27:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:27:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:57,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-11-07 00:27:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:57,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-11-07 00:27:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-11-07 00:27:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:27:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:27:57,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307056606] [2020-11-07 00:27:57,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:27:57,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 00:27:57,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58870470] [2020-11-07 00:27:57,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 00:27:57,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:27:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 00:27:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2020-11-07 00:27:57,896 INFO L87 Difference]: Start difference. First operand 403 states and 498 transitions. Second operand 28 states. [2020-11-07 00:28:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:06,870 INFO L93 Difference]: Finished difference Result 747 states and 937 transitions. [2020-11-07 00:28:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-07 00:28:06,872 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 229 [2020-11-07 00:28:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:06,874 INFO L225 Difference]: With dead ends: 747 [2020-11-07 00:28:06,875 INFO L226 Difference]: Without dead ends: 515 [2020-11-07 00:28:06,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=344, Invalid=2518, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 00:28:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-11-07 00:28:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 403. [2020-11-07 00:28:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-11-07 00:28:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 498 transitions. [2020-11-07 00:28:06,988 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 498 transitions. Word has length 229 [2020-11-07 00:28:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:06,988 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 498 transitions. [2020-11-07 00:28:06,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 00:28:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 498 transitions. [2020-11-07 00:28:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-11-07 00:28:06,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:06,989 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:06,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 00:28:06,989 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:06,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1435626536, now seen corresponding path program 24 times [2020-11-07 00:28:06,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:06,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813340111] [2020-11-07 00:28:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:07,205 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:07,430 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:07,432 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:07,433 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:07,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:28:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813340111] [2020-11-07 00:28:08,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:08,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 00:28:08,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429864685] [2020-11-07 00:28:08,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 00:28:08,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:08,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 00:28:08,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:28:08,215 INFO L87 Difference]: Start difference. First operand 403 states and 498 transitions. Second operand 29 states. [2020-11-07 00:28:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:12,787 INFO L93 Difference]: Finished difference Result 948 states and 1144 transitions. [2020-11-07 00:28:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 00:28:12,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 234 [2020-11-07 00:28:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:12,792 INFO L225 Difference]: With dead ends: 948 [2020-11-07 00:28:12,792 INFO L226 Difference]: Without dead ends: 709 [2020-11-07 00:28:12,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2020-11-07 00:28:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-11-07 00:28:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 413. [2020-11-07 00:28:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-11-07 00:28:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 511 transitions. [2020-11-07 00:28:12,910 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 511 transitions. Word has length 234 [2020-11-07 00:28:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:12,911 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 511 transitions. [2020-11-07 00:28:12,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 00:28:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 511 transitions. [2020-11-07 00:28:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-11-07 00:28:12,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:12,913 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:12,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 00:28:12,913 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -756836938, now seen corresponding path program 23 times [2020-11-07 00:28:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:12,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942805361] [2020-11-07 00:28:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:13,130 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:13,133 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:13,135 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-07 00:28:13,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942805361] [2020-11-07 00:28:13,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:13,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511600053] [2020-11-07 00:28:13,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:13,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:13,487 INFO L87 Difference]: Start difference. First operand 413 states and 511 transitions. Second operand 11 states. [2020-11-07 00:28:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:15,177 INFO L93 Difference]: Finished difference Result 470 states and 592 transitions. [2020-11-07 00:28:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:15,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2020-11-07 00:28:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:15,182 INFO L225 Difference]: With dead ends: 470 [2020-11-07 00:28:15,183 INFO L226 Difference]: Without dead ends: 461 [2020-11-07 00:28:15,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-11-07 00:28:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-11-07 00:28:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-11-07 00:28:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2020-11-07 00:28:15,317 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 234 [2020-11-07 00:28:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:15,318 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2020-11-07 00:28:15,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2020-11-07 00:28:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-11-07 00:28:15,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:15,321 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:15,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-07 00:28:15,321 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1646971217, now seen corresponding path program 1 times [2020-11-07 00:28:15,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:15,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427593900] [2020-11-07 00:28:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:15,618 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:15,620 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:15,621 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-07 00:28:15,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427593900] [2020-11-07 00:28:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:28:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184594774] [2020-11-07 00:28:15,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:28:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:15,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:28:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:28:15,777 INFO L87 Difference]: Start difference. First operand 447 states and 558 transitions. Second operand 7 states. [2020-11-07 00:28:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:16,922 INFO L93 Difference]: Finished difference Result 454 states and 564 transitions. [2020-11-07 00:28:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:28:16,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 236 [2020-11-07 00:28:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:16,928 INFO L225 Difference]: With dead ends: 454 [2020-11-07 00:28:16,928 INFO L226 Difference]: Without dead ends: 441 [2020-11-07 00:28:16,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-11-07 00:28:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2020-11-07 00:28:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-11-07 00:28:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 550 transitions. [2020-11-07 00:28:17,071 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 550 transitions. Word has length 236 [2020-11-07 00:28:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:17,072 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 550 transitions. [2020-11-07 00:28:17,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:28:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 550 transitions. [2020-11-07 00:28:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-07 00:28:17,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:17,075 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2020-11-07 00:28:17,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-07 00:28:17,075 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1615315333, now seen corresponding path program 1 times [2020-11-07 00:28:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:17,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963605581] [2020-11-07 00:28:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:17,079 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-07 00:28:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-11-07 00:28:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-11-07 00:28:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-11-07 00:28:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-07 00:28:17,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963605581] [2020-11-07 00:28:17,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:17,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:28:17,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187939672] [2020-11-07 00:28:17,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:28:17,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:28:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:28:17,300 INFO L87 Difference]: Start difference. First operand 441 states and 550 transitions. Second operand 6 states. [2020-11-07 00:28:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:18,137 INFO L93 Difference]: Finished difference Result 701 states and 878 transitions. [2020-11-07 00:28:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:28:18,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 239 [2020-11-07 00:28:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:18,142 INFO L225 Difference]: With dead ends: 701 [2020-11-07 00:28:18,142 INFO L226 Difference]: Without dead ends: 289 [2020-11-07 00:28:18,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:28:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-07 00:28:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 272. [2020-11-07 00:28:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-11-07 00:28:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 336 transitions. [2020-11-07 00:28:18,265 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 336 transitions. Word has length 239 [2020-11-07 00:28:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:18,265 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 336 transitions. [2020-11-07 00:28:18,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:28:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 336 transitions. [2020-11-07 00:28:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-11-07 00:28:18,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:18,267 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:18,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-07 00:28:18,267 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1727576548, now seen corresponding path program 1 times [2020-11-07 00:28:18,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:18,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536610035] [2020-11-07 00:28:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:18,631 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:18,633 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:18,635 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:18,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-11-07 00:28:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-07 00:28:19,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536610035] [2020-11-07 00:28:19,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:19,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:28:19,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394443710] [2020-11-07 00:28:19,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:28:19,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:28:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:28:19,076 INFO L87 Difference]: Start difference. First operand 272 states and 336 transitions. Second operand 9 states. [2020-11-07 00:28:20,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:20,751 INFO L93 Difference]: Finished difference Result 327 states and 399 transitions. [2020-11-07 00:28:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:28:20,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 245 [2020-11-07 00:28:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:20,759 INFO L225 Difference]: With dead ends: 327 [2020-11-07 00:28:20,759 INFO L226 Difference]: Without dead ends: 307 [2020-11-07 00:28:20,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:28:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-11-07 00:28:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 278. [2020-11-07 00:28:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-11-07 00:28:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2020-11-07 00:28:20,941 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 245 [2020-11-07 00:28:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:20,941 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2020-11-07 00:28:20,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:28:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2020-11-07 00:28:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-11-07 00:28:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:20,943 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2020-11-07 00:28:20,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-07 00:28:20,943 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash -685351208, now seen corresponding path program 1 times [2020-11-07 00:28:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661530692] [2020-11-07 00:28:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:21,220 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:21,221 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:21,222 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-11-07 00:28:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:28:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661530692] [2020-11-07 00:28:21,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:21,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:28:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006413917] [2020-11-07 00:28:21,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:28:21,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:28:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:28:21,617 INFO L87 Difference]: Start difference. First operand 278 states and 342 transitions. Second operand 10 states. [2020-11-07 00:28:23,268 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-11-07 00:28:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:24,019 INFO L93 Difference]: Finished difference Result 338 states and 409 transitions. [2020-11-07 00:28:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:28:24,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 249 [2020-11-07 00:28:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:24,021 INFO L225 Difference]: With dead ends: 338 [2020-11-07 00:28:24,021 INFO L226 Difference]: Without dead ends: 325 [2020-11-07 00:28:24,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:28:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-11-07 00:28:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2020-11-07 00:28:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-11-07 00:28:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 388 transitions. [2020-11-07 00:28:24,137 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 388 transitions. Word has length 249 [2020-11-07 00:28:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:24,137 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 388 transitions. [2020-11-07 00:28:24,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:28:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 388 transitions. [2020-11-07 00:28:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-11-07 00:28:24,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:24,139 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2020-11-07 00:28:24,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-07 00:28:24,139 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1548901098, now seen corresponding path program 1 times [2020-11-07 00:28:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:24,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441582695] [2020-11-07 00:28:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:24,376 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:24,377 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:24,378 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-11-07 00:28:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-11-07 00:28:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:28:24,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441582695] [2020-11-07 00:28:24,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:24,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:24,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72014219] [2020-11-07 00:28:24,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:24,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:24,764 INFO L87 Difference]: Start difference. First operand 317 states and 388 transitions. Second operand 11 states. [2020-11-07 00:28:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:27,161 INFO L93 Difference]: Finished difference Result 330 states and 400 transitions. [2020-11-07 00:28:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:27,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 252 [2020-11-07 00:28:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:27,166 INFO L225 Difference]: With dead ends: 330 [2020-11-07 00:28:27,166 INFO L226 Difference]: Without dead ends: 303 [2020-11-07 00:28:27,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-11-07 00:28:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-11-07 00:28:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-11-07 00:28:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 311 transitions. [2020-11-07 00:28:27,257 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 311 transitions. Word has length 252 [2020-11-07 00:28:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:27,257 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 311 transitions. [2020-11-07 00:28:27,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 311 transitions. [2020-11-07 00:28:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 00:28:27,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:27,259 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-07 00:28:27,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-07 00:28:27,259 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1452667500, now seen corresponding path program 2 times [2020-11-07 00:28:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:27,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282807133] [2020-11-07 00:28:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:27,511 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:27,514 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:27,515 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-11-07 00:28:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:27,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-11-07 00:28:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-07 00:28:28,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282807133] [2020-11-07 00:28:28,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:28,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:28:28,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239868475] [2020-11-07 00:28:28,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:28:28,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:28:28,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:28:28,004 INFO L87 Difference]: Start difference. First operand 274 states and 311 transitions. Second operand 11 states. [2020-11-07 00:28:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:29,642 INFO L93 Difference]: Finished difference Result 343 states and 388 transitions. [2020-11-07 00:28:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:28:29,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 253 [2020-11-07 00:28:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:29,647 INFO L225 Difference]: With dead ends: 343 [2020-11-07 00:28:29,647 INFO L226 Difference]: Without dead ends: 277 [2020-11-07 00:28:29,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-11-07 00:28:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-11-07 00:28:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-07 00:28:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2020-11-07 00:28:29,774 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 253 [2020-11-07 00:28:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:29,774 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2020-11-07 00:28:29,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:28:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2020-11-07 00:28:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-11-07 00:28:29,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:29,775 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-07 00:28:29,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-11-07 00:28:29,776 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:29,776 INFO L82 PathProgramCache]: Analyzing trace with hash 61920203, now seen corresponding path program 1 times [2020-11-07 00:28:29,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:29,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077257399] [2020-11-07 00:28:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:30,031 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:30,032 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:30,034 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-11-07 00:28:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-11-07 00:28:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-07 00:28:30,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077257399] [2020-11-07 00:28:30,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:30,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 00:28:30,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633016637] [2020-11-07 00:28:30,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 00:28:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 00:28:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:28:30,913 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand 15 states. [2020-11-07 00:28:33,010 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-11-07 00:28:33,516 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-11-07 00:28:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:34,612 INFO L93 Difference]: Finished difference Result 334 states and 376 transitions. [2020-11-07 00:28:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:28:34,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 254 [2020-11-07 00:28:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:34,615 INFO L225 Difference]: With dead ends: 334 [2020-11-07 00:28:34,615 INFO L226 Difference]: Without dead ends: 321 [2020-11-07 00:28:34,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-11-07 00:28:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-11-07 00:28:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2020-11-07 00:28:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-11-07 00:28:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 355 transitions. [2020-11-07 00:28:34,721 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 355 transitions. Word has length 254 [2020-11-07 00:28:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:34,722 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 355 transitions. [2020-11-07 00:28:34,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 00:28:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 355 transitions. [2020-11-07 00:28:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-11-07 00:28:34,723 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:34,723 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:28:34,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-11-07 00:28:34,723 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1684077380, now seen corresponding path program 1 times [2020-11-07 00:28:34,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:34,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640925469] [2020-11-07 00:28:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:35,005 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:35,007 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:35,008 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-11-07 00:28:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-11-07 00:28:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:35,585 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2020-11-07 00:28:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-07 00:28:36,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640925469] [2020-11-07 00:28:36,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:36,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:28:36,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720569869] [2020-11-07 00:28:36,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:28:36,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:28:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:28:36,073 INFO L87 Difference]: Start difference. First operand 313 states and 355 transitions. Second operand 12 states. [2020-11-07 00:28:38,211 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 00:28:38,420 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 00:28:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:39,403 INFO L93 Difference]: Finished difference Result 326 states and 367 transitions. [2020-11-07 00:28:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:28:39,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 255 [2020-11-07 00:28:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:39,406 INFO L225 Difference]: With dead ends: 326 [2020-11-07 00:28:39,406 INFO L226 Difference]: Without dead ends: 284 [2020-11-07 00:28:39,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-11-07 00:28:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-11-07 00:28:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 277. [2020-11-07 00:28:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-07 00:28:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 313 transitions. [2020-11-07 00:28:39,506 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 313 transitions. Word has length 255 [2020-11-07 00:28:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:39,506 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 313 transitions. [2020-11-07 00:28:39,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:28:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 313 transitions. [2020-11-07 00:28:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-11-07 00:28:39,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:28:39,508 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-07 00:28:39,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-11-07 00:28:39,508 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:28:39,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:28:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1598956265, now seen corresponding path program 1 times [2020-11-07 00:28:39,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:28:39,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395236325] [2020-11-07 00:28:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:28:39,766 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 00:28:39,768 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 00:28:39,770 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:28:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:28:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:39,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-07 00:28:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:40,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 00:28:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:40,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-11-07 00:28:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:40,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-11-07 00:28:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:40,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-11-07 00:28:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:28:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-07 00:28:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395236325] [2020-11-07 00:28:40,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:28:40,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 00:28:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393926833] [2020-11-07 00:28:40,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 00:28:40,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:28:40,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 00:28:40,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:28:40,793 INFO L87 Difference]: Start difference. First operand 277 states and 313 transitions. Second operand 13 states. [2020-11-07 00:28:44,051 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 00:28:44,261 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-11-07 00:28:44,527 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-11-07 00:28:44,863 WARN L194 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-11-07 00:28:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:28:45,461 INFO L93 Difference]: Finished difference Result 277 states and 313 transitions. [2020-11-07 00:28:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 00:28:45,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 257 [2020-11-07 00:28:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:28:45,472 INFO L225 Difference]: With dead ends: 277 [2020-11-07 00:28:45,472 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 00:28:45,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:28:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 00:28:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 00:28:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 00:28:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 00:28:45,475 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 257 [2020-11-07 00:28:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:28:45,475 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 00:28:45,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 00:28:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 00:28:45,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 00:28:45,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-11-07 00:28:45,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 00:28:45,991 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2020-11-07 00:28:46,135 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 35 [2020-11-07 00:28:46,300 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-11-07 00:28:46,684 WARN L194 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-11-07 00:28:47,084 WARN L194 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:47,797 WARN L194 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2020-11-07 00:28:48,034 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2020-11-07 00:28:48,738 WARN L194 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 35 [2020-11-07 00:28:49,068 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-11-07 00:28:49,451 WARN L194 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-11-07 00:28:49,783 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2020-11-07 00:28:49,954 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:50,056 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 35 [2020-11-07 00:28:50,236 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-11-07 00:28:50,418 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:50,593 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2020-11-07 00:28:50,882 WARN L194 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 35 [2020-11-07 00:28:50,986 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-11-07 00:28:51,366 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2020-11-07 00:28:51,661 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 35 [2020-11-07 00:28:51,907 WARN L194 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 35 [2020-11-07 00:28:52,620 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 44 [2020-11-07 00:28:53,750 WARN L194 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 263 DAG size of output: 44 [2020-11-07 00:29:04,192 WARN L194 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 598 DAG size of output: 42 [2020-11-07 00:29:08,239 WARN L194 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 442 DAG size of output: 42 [2020-11-07 00:29:15,628 WARN L194 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 544 DAG size of output: 42 [2020-11-07 00:30:23,958 WARN L194 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 1646 DAG size of output: 1074 [2020-11-07 00:30:24,407 WARN L194 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 44 [2020-11-07 00:31:06,998 WARN L194 SmtUtils]: Spent 42.59 s on a formula simplification. DAG size of input: 1313 DAG size of output: 728 [2020-11-07 00:32:56,807 WARN L194 SmtUtils]: Spent 1.83 m on a formula simplification. DAG size of input: 1315 DAG size of output: 49 [2020-11-07 00:33:21,473 WARN L194 SmtUtils]: Spent 24.66 s on a formula simplification. DAG size of input: 771 DAG size of output: 45 [2020-11-07 00:33:21,708 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 44 [2020-11-07 00:33:23,822 WARN L194 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 348 DAG size of output: 42 [2020-11-07 00:33:25,332 WARN L194 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 305 DAG size of output: 44 [2020-11-07 00:35:08,362 WARN L194 SmtUtils]: Spent 1.72 m on a formula simplification. DAG size of input: 1247 DAG size of output: 44 [2020-11-07 00:35:47,315 WARN L194 SmtUtils]: Spent 38.95 s on a formula simplification. DAG size of input: 897 DAG size of output: 45 [2020-11-07 00:36:49,158 WARN L194 SmtUtils]: Spent 1.03 m on a formula simplification. DAG size of input: 1101 DAG size of output: 45