/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:27:01,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:27:01,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:27:01,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 01:27:01,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:27:01,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:27:01,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:27:01,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:27:01,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:27:01,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:27:01,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:27:01,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:27:01,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:27:01,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:27:01,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:27:01,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:27:01,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:27:01,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:27:01,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:27:01,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:27:01,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:27:01,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:27:01,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:27:01,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:27:01,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:27:01,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:27:01,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:27:01,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:27:01,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:27:01,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:27:01,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:27:01,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:27:01,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:27:01,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:27:01,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:27:01,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:27:01,251 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:27:01,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:27:01,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:27:01,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:27:01,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:27:01,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:27:01,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:27:01,252 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:27:01,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:27:01,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:27:01,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:27:01,649 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:27:01,654 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:27:01,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-11-07 01:27:01,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b3e82a1/bbf80129f3a54cc9ba8c048a9a5dc965/FLAG1ff1c1dbc [2020-11-07 01:27:02,424 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:27:02,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2020-11-07 01:27:02,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b3e82a1/bbf80129f3a54cc9ba8c048a9a5dc965/FLAG1ff1c1dbc [2020-11-07 01:27:02,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b3e82a1/bbf80129f3a54cc9ba8c048a9a5dc965 [2020-11-07 01:27:02,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:27:02,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:27:02,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:27:02,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:27:02,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:27:02,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:02" (1/1) ... [2020-11-07 01:27:02,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b1454a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:02, skipping insertion in model container [2020-11-07 01:27:02,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:02" (1/1) ... [2020-11-07 01:27:02,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:27:02,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:27:03,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:27:03,247 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:27:03,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:27:03,485 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:27:03,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03 WrapperNode [2020-11-07 01:27:03,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:27:03,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:27:03,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:27:03,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:27:03,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... [2020-11-07 01:27:03,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:27:03,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:27:03,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:27:03,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:27:03,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:27:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:27:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:27:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:27:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-11-07 01:27:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:27:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-11-07 01:27:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:27:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:27:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:27:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:27:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 01:27:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-07 01:27:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:27:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:27:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:27:03,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:27:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:27:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:27:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:27:05,246 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:27:05,247 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:27:05,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:05 BoogieIcfgContainer [2020-11-07 01:27:05,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:27:05,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:27:05,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:27:05,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:27:05,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:02" (1/3) ... [2020-11-07 01:27:05,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd78f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:05, skipping insertion in model container [2020-11-07 01:27:05,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:03" (2/3) ... [2020-11-07 01:27:05,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd78f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:05, skipping insertion in model container [2020-11-07 01:27:05,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:05" (3/3) ... [2020-11-07 01:27:05,305 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2020-11-07 01:27:05,330 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:27:05,334 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:27:05,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:27:05,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:27:05,372 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:27:05,372 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:27:05,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:27:05,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:27:05,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:27:05,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:27:05,373 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:27:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states. [2020-11-07 01:27:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-07 01:27:05,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:27:05,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:27:05,437 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:27:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:27:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1040963220, now seen corresponding path program 1 times [2020-11-07 01:27:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:27:05,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410477981] [2020-11-07 01:27:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:27:05,533 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:27:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:27:06,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:27:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:27:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:27:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410477981] [2020-11-07 01:27:06,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:27:06,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:27:06,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854244378] [2020-11-07 01:27:06,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:27:06,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:27:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:27:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:27:06,185 INFO L87 Difference]: Start difference. First operand 539 states. Second operand 4 states. [2020-11-07 01:27:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:27:09,029 INFO L93 Difference]: Finished difference Result 1219 states and 1666 transitions. [2020-11-07 01:27:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:27:09,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-11-07 01:27:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:27:09,054 INFO L225 Difference]: With dead ends: 1219 [2020-11-07 01:27:09,055 INFO L226 Difference]: Without dead ends: 637 [2020-11-07 01:27:09,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:27:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-11-07 01:27:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 624. [2020-11-07 01:27:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-11-07 01:27:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 760 transitions. [2020-11-07 01:27:09,269 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 760 transitions. Word has length 144 [2020-11-07 01:27:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:27:09,270 INFO L481 AbstractCegarLoop]: Abstraction has 624 states and 760 transitions. [2020-11-07 01:27:09,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:27:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 760 transitions. [2020-11-07 01:27:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-11-07 01:27:09,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:27:09,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:27:09,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:27:09,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:27:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:27:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1817714051, now seen corresponding path program 1 times [2020-11-07 01:27:09,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:27:09,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104125457] [2020-11-07 01:27:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:27:09,532 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-11-07 01:27:09,915 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:27:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:27:10,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:27:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:27:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:27:11,018 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:27:11,180 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:27:11,524 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:27:11,949 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:27:12,253 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:27:12,554 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:27:12,830 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:27:13,451 WARN L194 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:27:13,812 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:27:14,205 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:27:14,411 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 21 [2020-11-07 01:27:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104125457] [2020-11-07 01:27:15,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:27:15,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:27:15,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338475684] [2020-11-07 01:27:15,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 01:27:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:27:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 01:27:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:27:15,374 INFO L87 Difference]: Start difference. First operand 624 states and 760 transitions. Second operand 36 states. [2020-11-07 01:27:15,699 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-11-07 01:27:15,827 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:27:15,957 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-11-07 01:27:16,090 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:27:16,220 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:27:16,364 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:27:16,669 WARN L194 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2020-11-07 01:27:17,019 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-11-07 01:27:17,167 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-11-07 01:27:17,389 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-11-07 01:27:17,798 WARN L194 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:27:18,370 WARN L194 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-11-07 01:27:18,954 WARN L194 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:27:19,579 WARN L194 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2020-11-07 01:27:20,167 WARN L194 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 135 [2020-11-07 01:27:20,734 WARN L194 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-07 01:27:21,725 WARN L194 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 136 [2020-11-07 01:27:22,785 WARN L194 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 142 [2020-11-07 01:27:23,943 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 147 DAG size of output: 143 [2020-11-07 01:27:24,479 WARN L194 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-11-07 01:27:25,426 WARN L194 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2020-11-07 01:27:26,458 WARN L194 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2020-11-07 01:27:26,769 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:27:26,931 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:27:27,134 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:27:27,314 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 01:27:27,551 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-11-07 01:27:27,728 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:27:27,944 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:27:28,431 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-11-07 01:27:28,796 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:27:29,222 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:27:29,369 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:27:29,725 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:27:30,054 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-11-07 01:27:30,208 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:27:30,595 WARN L194 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:27:30,781 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:27:31,257 WARN L194 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:27:31,520 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:27:31,975 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:27:32,282 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:27:32,761 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-11-07 01:27:32,940 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:27:33,194 WARN L194 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:27:33,691 WARN L194 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-07 01:27:34,117 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:27:34,662 WARN L194 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:27:35,004 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:27:35,568 WARN L194 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:27:35,962 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:27:36,186 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:27:36,601 WARN L194 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:27:37,107 WARN L194 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:27:37,650 WARN L194 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:27:38,170 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:27:38,310 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:27:38,522 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 01:27:39,076 WARN L194 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:27:39,229 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-11-07 01:27:39,811 WARN L194 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-07 01:27:40,402 WARN L194 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:27:40,732 WARN L194 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 115 [2020-11-07 01:27:41,377 WARN L194 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:27:41,785 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2020-11-07 01:27:42,292 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2020-11-07 01:27:43,048 WARN L194 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2020-11-07 01:27:43,648 WARN L194 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2020-11-07 01:27:44,359 WARN L194 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-11-07 01:27:45,105 WARN L194 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 137 [2020-11-07 01:27:46,163 WARN L194 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 138 [2020-11-07 01:27:47,354 WARN L194 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 147 DAG size of output: 144 [2020-11-07 01:27:48,732 WARN L194 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2020-11-07 01:27:49,123 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:27:50,098 WARN L194 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 148 [2020-11-07 01:27:50,278 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:27:50,703 WARN L194 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:27:51,752 WARN L194 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2020-11-07 01:27:52,154 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:27:52,688 WARN L194 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:27:52,863 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-11-07 01:27:53,415 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:27:54,043 WARN L194 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:27:54,768 WARN L194 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:27:55,505 WARN L194 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:27:56,599 WARN L194 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 135 [2020-11-07 01:27:57,808 WARN L194 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2020-11-07 01:27:59,087 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2020-11-07 01:28:00,173 WARN L194 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-11-07 01:28:01,284 WARN L194 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 146 [2020-11-07 01:28:04,165 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-11-07 01:28:07,693 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:28:07,962 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:28:08,206 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-07 01:28:08,444 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:28:08,624 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-07 01:28:08,904 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:28:09,068 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-07 01:28:09,353 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-11-07 01:28:09,600 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-11-07 01:28:09,825 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:28:10,050 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-11-07 01:28:10,298 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-11-07 01:28:10,469 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:28:10,623 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:28:10,764 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-07 01:28:10,928 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:28:11,324 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-07 01:28:11,575 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-07 01:28:11,849 WARN L194 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-07 01:28:12,130 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-07 01:28:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:28:14,440 INFO L93 Difference]: Finished difference Result 2884 states and 4356 transitions. [2020-11-07 01:28:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2020-11-07 01:28:14,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 178 [2020-11-07 01:28:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:28:14,485 INFO L225 Difference]: With dead ends: 2884 [2020-11-07 01:28:14,486 INFO L226 Difference]: Without dead ends: 2290 [2020-11-07 01:28:14,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17528 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=5784, Invalid=36858, Unknown=0, NotChecked=0, Total=42642 [2020-11-07 01:28:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2020-11-07 01:28:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1819. [2020-11-07 01:28:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1819 states. [2020-11-07 01:28:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2465 transitions. [2020-11-07 01:28:15,205 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2465 transitions. Word has length 178 [2020-11-07 01:28:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:28:15,206 INFO L481 AbstractCegarLoop]: Abstraction has 1819 states and 2465 transitions. [2020-11-07 01:28:15,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 01:28:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2465 transitions. [2020-11-07 01:28:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 01:28:15,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:28:15,220 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:28:15,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:28:15,220 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:28:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:28:15,221 INFO L82 PathProgramCache]: Analyzing trace with hash -978659654, now seen corresponding path program 1 times [2020-11-07 01:28:15,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:28:15,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287955834] [2020-11-07 01:28:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:28:15,451 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:28:15,783 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-11-07 01:28:16,849 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:28:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:28:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:28:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:28:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:28:18,120 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:28:18,293 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:28:18,485 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:28:18,861 WARN L194 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:28:19,282 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:28:19,550 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:28:19,837 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:28:20,183 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:28:20,790 WARN L194 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:28:21,165 WARN L194 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:28:21,553 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:28:21,971 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:28:22,783 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-07 01:28:23,603 WARN L194 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-11-07 01:28:24,478 WARN L194 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-11-07 01:28:25,380 WARN L194 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-11-07 01:28:25,922 WARN L194 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-11-07 01:28:26,925 WARN L194 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-11-07 01:28:27,521 WARN L194 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:28:28,111 WARN L194 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:28:29,220 WARN L194 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-11-07 01:28:30,251 WARN L194 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-11-07 01:28:30,555 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 21 [2020-11-07 01:28:31,683 WARN L194 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:28:32,467 WARN L194 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:28:33,254 WARN L194 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:28:34,112 WARN L194 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:28:35,033 WARN L194 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:28:35,787 WARN L194 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-07 01:28:36,593 WARN L194 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-07 01:28:38,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287955834] [2020-11-07 01:28:38,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:28:38,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-11-07 01:28:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557905524] [2020-11-07 01:28:38,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-07 01:28:38,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:28:38,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-07 01:28:38,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=1948, Unknown=0, NotChecked=0, Total=2862 [2020-11-07 01:28:38,757 INFO L87 Difference]: Start difference. First operand 1819 states and 2465 transitions. Second operand 52 states. [2020-11-07 01:28:39,087 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:28:39,211 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:28:39,331 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:28:39,458 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:28:39,594 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:28:39,857 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 99 [2020-11-07 01:28:40,220 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 111 [2020-11-07 01:28:40,396 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:28:40,881 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2020-11-07 01:28:41,231 WARN L194 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-11-07 01:28:41,996 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 119 [2020-11-07 01:28:42,463 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:28:43,103 WARN L194 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 120 [2020-11-07 01:28:43,258 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:28:43,521 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 01:28:43,774 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-11-07 01:28:43,992 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-11-07 01:28:44,242 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:28:44,725 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-11-07 01:28:45,064 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:28:45,422 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:28:45,800 WARN L194 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:28:46,244 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:28:46,411 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:28:46,852 WARN L194 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:28:47,015 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:28:47,477 WARN L194 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:28:47,668 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:28:48,153 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-11-07 01:28:48,506 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-11-07 01:28:48,724 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:28:49,257 WARN L194 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-07 01:28:49,504 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:28:50,035 WARN L194 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:28:50,317 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:28:50,892 WARN L194 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:28:51,208 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:28:51,837 WARN L194 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:28:52,041 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-11-07 01:28:52,343 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:28:52,998 WARN L194 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:28:53,371 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:28:54,024 WARN L194 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:28:54,439 WARN L194 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:28:54,570 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:28:55,251 WARN L194 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:28:55,683 WARN L194 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:28:55,955 WARN L194 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2020-11-07 01:28:56,657 WARN L194 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-11-07 01:28:57,234 WARN L194 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:28:58,009 WARN L194 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-07 01:28:58,501 WARN L194 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:28:58,876 WARN L194 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 112 [2020-11-07 01:28:59,621 WARN L194 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-11-07 01:29:00,140 WARN L194 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:29:00,961 WARN L194 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-11-07 01:29:01,516 WARN L194 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:29:02,322 WARN L194 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-11-07 01:29:02,901 WARN L194 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:29:03,134 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-11-07 01:29:03,959 WARN L194 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-11-07 01:29:04,553 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:29:04,980 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 115 [2020-11-07 01:29:05,720 WARN L194 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-11-07 01:29:06,358 WARN L194 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:29:06,845 WARN L194 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 116 [2020-11-07 01:29:07,066 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:29:07,724 WARN L194 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:29:08,317 WARN L194 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 121 [2020-11-07 01:29:09,079 WARN L194 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:29:09,868 WARN L194 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:29:10,720 WARN L194 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:29:11,539 WARN L194 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:29:12,242 WARN L194 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 129 [2020-11-07 01:29:13,076 WARN L194 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:29:13,963 WARN L194 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-11-07 01:29:14,989 WARN L194 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-11-07 01:29:15,878 WARN L194 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-11-07 01:29:16,681 WARN L194 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 130 [2020-11-07 01:29:18,185 WARN L194 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-11-07 01:29:18,709 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-11-07 01:29:19,764 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 131 [2020-11-07 01:29:21,262 WARN L194 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 134 [2020-11-07 01:29:21,443 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:29:22,301 WARN L194 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 122 [2020-11-07 01:29:22,599 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:29:25,364 WARN L194 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-11-07 01:29:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:29:31,558 INFO L93 Difference]: Finished difference Result 5647 states and 8007 transitions. [2020-11-07 01:29:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-11-07 01:29:31,559 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 217 [2020-11-07 01:29:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:29:31,585 INFO L225 Difference]: With dead ends: 5647 [2020-11-07 01:29:31,585 INFO L226 Difference]: Without dead ends: 3707 [2020-11-07 01:29:31,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 30 SyntacticMatches, 17 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8678 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=4850, Invalid=20590, Unknown=0, NotChecked=0, Total=25440 [2020-11-07 01:29:31,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2020-11-07 01:29:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2604. [2020-11-07 01:29:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2604 states. [2020-11-07 01:29:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 3477 transitions. [2020-11-07 01:29:32,692 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 3477 transitions. Word has length 217 [2020-11-07 01:29:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:29:32,692 INFO L481 AbstractCegarLoop]: Abstraction has 2604 states and 3477 transitions. [2020-11-07 01:29:32,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-07 01:29:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 3477 transitions. [2020-11-07 01:29:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-07 01:29:32,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:29:32,708 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:29:32,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:29:32,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:29:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:29:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1449206108, now seen corresponding path program 1 times [2020-11-07 01:29:32,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:29:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470927532] [2020-11-07 01:29:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:29:32,967 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-11-07 01:29:33,277 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2020-11-07 01:29:34,315 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:29:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:29:34,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:29:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:29:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:29:35,345 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:29:35,517 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:29:35,713 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:29:36,147 WARN L194 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:29:36,596 WARN L194 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-11-07 01:29:36,878 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-11-07 01:29:37,180 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:29:37,516 WARN L194 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-11-07 01:29:38,169 WARN L194 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-11-07 01:29:38,554 WARN L194 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-11-07 01:29:39,006 WARN L194 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-11-07 01:29:39,479 WARN L194 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:29:39,756 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2020-11-07 01:29:43,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470927532] [2020-11-07 01:29:43,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:29:43,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-11-07 01:29:43,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351637411] [2020-11-07 01:29:43,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-07 01:29:43,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:29:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-07 01:29:43,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1673, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:29:43,885 INFO L87 Difference]: Start difference. First operand 2604 states and 3477 transitions. Second operand 44 states. [2020-11-07 01:29:44,214 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:29:44,348 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:29:44,477 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:29:44,617 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:29:44,762 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:29:45,052 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2020-11-07 01:29:45,453 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 112 [2020-11-07 01:29:45,662 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-07 01:29:46,176 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 115 [2020-11-07 01:29:46,687 WARN L194 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-11-07 01:29:47,463 WARN L194 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 120 [2020-11-07 01:29:48,081 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:29:48,429 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-11-07 01:29:48,710 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-11-07 01:29:49,257 WARN L194 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 114 [2020-11-07 01:29:49,795 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2020-11-07 01:29:50,363 WARN L194 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2020-11-07 01:29:50,540 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:29:50,874 WARN L194 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-11-07 01:29:51,418 WARN L194 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-07 01:29:51,596 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:29:52,220 WARN L194 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2020-11-07 01:29:52,580 WARN L194 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-11-07 01:29:53,163 WARN L194 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2020-11-07 01:29:53,642 WARN L194 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 121 [2020-11-07 01:29:54,349 WARN L194 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 134 [2020-11-07 01:29:54,633 WARN L194 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-07 01:29:55,111 WARN L194 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2020-11-07 01:29:55,288 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-11-07 01:29:56,106 WARN L194 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2020-11-07 01:29:56,698 WARN L194 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 134 [2020-11-07 01:29:57,130 WARN L194 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 01:29:57,764 WARN L194 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-11-07 01:29:58,517 WARN L194 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 139 [2020-11-07 01:29:59,236 WARN L194 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 136 [2020-11-07 01:29:59,582 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-07 01:30:00,345 WARN L194 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 137 [2020-11-07 01:30:01,160 WARN L194 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 140 [2020-11-07 01:30:02,098 WARN L194 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 140 [2020-11-07 01:30:02,548 WARN L194 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-11-07 01:30:03,412 WARN L194 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2020-11-07 01:30:04,380 WARN L194 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 142 [2020-11-07 01:30:04,586 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:30:05,124 WARN L194 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:30:05,382 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:30:05,953 WARN L194 SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:30:06,625 WARN L194 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:30:07,301 WARN L194 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:30:07,676 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2020-11-07 01:30:08,066 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-11-07 01:30:08,484 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-11-07 01:30:08,775 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-11-07 01:30:09,229 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-07 01:30:09,529 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:30:09,734 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:30:10,036 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:30:10,393 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:30:10,840 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:30:11,227 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-11-07 01:30:11,527 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:30:11,917 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-11-07 01:30:12,240 WARN L194 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:30:12,412 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:30:12,778 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:30:13,097 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2020-11-07 01:30:13,496 WARN L194 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:30:14,003 WARN L194 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-11-07 01:30:14,425 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 113 [2020-11-07 01:30:14,906 WARN L194 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-11-07 01:30:15,499 WARN L194 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:30:16,097 WARN L194 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:30:16,696 WARN L194 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:30:17,231 WARN L194 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2020-11-07 01:30:17,857 WARN L194 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:30:18,390 WARN L194 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 116 [2020-11-07 01:30:18,998 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:30:19,634 WARN L194 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 121 [2020-11-07 01:30:20,281 WARN L194 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:30:20,598 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:30:21,583 WARN L194 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 130 [2020-11-07 01:30:23,706 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:30:24,416 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:30:24,726 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:30:25,173 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:30:25,379 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-11-07 01:30:25,834 WARN L194 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:30:26,406 WARN L194 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:30:27,037 WARN L194 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:30:27,714 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:30:28,464 WARN L194 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:30:29,219 WARN L194 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:30:30,432 WARN L194 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 135 [2020-11-07 01:30:30,610 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-07 01:30:31,788 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2020-11-07 01:30:33,228 WARN L194 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 146 DAG size of output: 142 [2020-11-07 01:30:34,348 WARN L194 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2020-11-07 01:30:35,557 WARN L194 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 146 [2020-11-07 01:30:36,619 WARN L194 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-11-07 01:30:37,162 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:30:41,291 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:30:45,584 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-11-07 01:30:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:30:48,093 INFO L93 Difference]: Finished difference Result 7068 states and 10360 transitions. [2020-11-07 01:30:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-11-07 01:30:48,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 219 [2020-11-07 01:30:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:30:48,135 INFO L225 Difference]: With dead ends: 7068 [2020-11-07 01:30:48,135 INFO L226 Difference]: Without dead ends: 4494 [2020-11-07 01:30:48,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 48 SyntacticMatches, 24 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19290 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=6003, Invalid=39579, Unknown=0, NotChecked=0, Total=45582 [2020-11-07 01:30:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-11-07 01:30:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 3550. [2020-11-07 01:30:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3550 states. [2020-11-07 01:30:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 4673 transitions. [2020-11-07 01:30:49,685 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 4673 transitions. Word has length 219 [2020-11-07 01:30:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:30:49,686 INFO L481 AbstractCegarLoop]: Abstraction has 3550 states and 4673 transitions. [2020-11-07 01:30:49,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-07 01:30:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 4673 transitions. [2020-11-07 01:30:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-11-07 01:30:49,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:30:49,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:30:49,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:30:49,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:30:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:30:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash 914891462, now seen corresponding path program 1 times [2020-11-07 01:30:49,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:30:49,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550826847] [2020-11-07 01:30:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:30:49,949 WARN L194 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 42 [2020-11-07 01:30:50,149 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:30:50,487 WARN L194 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 41 [2020-11-07 01:30:52,181 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:30:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:30:52,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:30:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:30:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:30:54,214 WARN L194 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:30:54,889 WARN L194 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:30:55,545 WARN L194 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:30:56,248 WARN L194 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:30:56,913 WARN L194 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:30:58,123 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-11-07 01:30:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550826847] [2020-11-07 01:30:58,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:30:58,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 01:30:58,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997353283] [2020-11-07 01:30:58,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 01:30:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:30:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 01:30:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 01:30:58,501 INFO L87 Difference]: Start difference. First operand 3550 states and 4673 transitions. Second operand 29 states. [2020-11-07 01:30:58,756 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:30:58,931 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:30:59,083 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:30:59,227 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:30:59,387 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:30:59,551 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:30:59,721 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:30:59,941 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-11-07 01:31:00,190 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:31:00,611 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:31:01,041 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:31:01,311 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:31:02,387 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:31:02,674 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-11-07 01:31:02,988 WARN L194 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:31:07,695 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:31:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:31:13,589 INFO L93 Difference]: Finished difference Result 7917 states and 10421 transitions. [2020-11-07 01:31:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 01:31:13,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 233 [2020-11-07 01:31:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:31:13,625 INFO L225 Difference]: With dead ends: 7917 [2020-11-07 01:31:13,625 INFO L226 Difference]: Without dead ends: 4397 [2020-11-07 01:31:13,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 28 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=553, Invalid=1997, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 01:31:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2020-11-07 01:31:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3870. [2020-11-07 01:31:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3870 states. [2020-11-07 01:31:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5033 transitions. [2020-11-07 01:31:15,163 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5033 transitions. Word has length 233 [2020-11-07 01:31:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:31:15,165 INFO L481 AbstractCegarLoop]: Abstraction has 3870 states and 5033 transitions. [2020-11-07 01:31:15,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 01:31:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5033 transitions. [2020-11-07 01:31:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-11-07 01:31:15,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:31:15,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:31:15,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:31:15,184 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:31:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:31:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1402191313, now seen corresponding path program 1 times [2020-11-07 01:31:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:31:15,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712314793] [2020-11-07 01:31:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:31:15,416 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 42 [2020-11-07 01:31:15,731 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:31:15,976 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 45 [2020-11-07 01:31:17,292 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:31:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:31:17,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:31:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:31:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:31:18,604 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-11-07 01:31:18,796 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-11-07 01:31:19,017 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-11-07 01:31:19,469 WARN L194 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-07 01:31:19,630 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2020-11-07 01:31:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712314793] [2020-11-07 01:31:22,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:31:22,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-11-07 01:31:22,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923423188] [2020-11-07 01:31:22,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-07 01:31:22,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:31:22,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-07 01:31:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2020-11-07 01:31:22,525 INFO L87 Difference]: Start difference. First operand 3870 states and 5033 transitions. Second operand 36 states. [2020-11-07 01:31:22,785 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-11-07 01:31:22,970 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:31:23,123 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:31:23,273 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:31:23,441 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:31:23,612 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:31:23,949 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 103 [2020-11-07 01:31:24,414 WARN L194 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2020-11-07 01:31:24,705 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-11-07 01:31:25,319 WARN L194 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 116 [2020-11-07 01:31:25,729 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-11-07 01:31:26,098 WARN L194 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-11-07 01:31:26,928 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:31:27,150 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-11-07 01:31:27,826 WARN L194 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 115 [2020-11-07 01:31:28,343 WARN L194 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2020-11-07 01:31:28,567 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-11-07 01:31:29,124 WARN L194 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2020-11-07 01:31:29,823 WARN L194 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2020-11-07 01:31:30,068 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:31:30,306 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-11-07 01:31:30,968 WARN L194 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2020-11-07 01:31:31,171 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:31:31,875 WARN L194 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-11-07 01:31:32,117 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-11-07 01:31:32,826 WARN L194 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 137 [2020-11-07 01:31:33,125 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-11-07 01:31:33,404 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:31:33,690 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-11-07 01:31:33,985 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:31:34,299 WARN L194 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-11-07 01:31:34,696 WARN L194 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:31:34,973 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-11-07 01:31:35,390 WARN L194 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:31:35,900 WARN L194 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-11-07 01:31:36,475 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-11-07 01:31:37,086 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-07 01:31:37,312 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-11-07 01:31:37,891 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-11-07 01:31:38,277 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:31:38,672 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-11-07 01:31:39,110 WARN L194 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-11-07 01:31:39,363 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:31:39,594 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:31:39,930 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:31:40,326 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:31:40,825 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:31:41,289 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-11-07 01:31:41,714 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:31:41,898 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:31:42,309 WARN L194 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-11-07 01:31:42,670 WARN L194 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 100 [2020-11-07 01:31:43,105 WARN L194 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:31:43,637 WARN L194 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 113 [2020-11-07 01:31:44,493 WARN L194 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2020-11-07 01:31:45,150 WARN L194 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 116 [2020-11-07 01:31:45,326 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-07 01:31:48,130 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-11-07 01:31:48,904 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:31:49,202 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:31:49,676 WARN L194 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 111 [2020-11-07 01:31:50,288 WARN L194 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 117 [2020-11-07 01:31:50,905 WARN L194 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2020-11-07 01:31:51,586 WARN L194 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2020-11-07 01:31:52,324 WARN L194 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 133 [2020-11-07 01:31:53,133 WARN L194 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 134 [2020-11-07 01:31:53,923 WARN L194 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2020-11-07 01:32:01,842 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:32:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:32:02,451 INFO L93 Difference]: Finished difference Result 8194 states and 10685 transitions. [2020-11-07 01:32:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-11-07 01:32:02,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 237 [2020-11-07 01:32:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:32:02,480 INFO L225 Difference]: With dead ends: 8194 [2020-11-07 01:32:02,481 INFO L226 Difference]: Without dead ends: 4548 [2020-11-07 01:32:02,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 65 SyntacticMatches, 21 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8231 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=2768, Invalid=16692, Unknown=0, NotChecked=0, Total=19460 [2020-11-07 01:32:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2020-11-07 01:32:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3863. [2020-11-07 01:32:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3863 states. [2020-11-07 01:32:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 4988 transitions. [2020-11-07 01:32:04,072 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 4988 transitions. Word has length 237 [2020-11-07 01:32:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:32:04,073 INFO L481 AbstractCegarLoop]: Abstraction has 3863 states and 4988 transitions. [2020-11-07 01:32:04,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-07 01:32:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 4988 transitions. [2020-11-07 01:32:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-11-07 01:32:04,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:32:04,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:32:04,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:32:04,092 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:32:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:32:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1050203787, now seen corresponding path program 1 times [2020-11-07 01:32:04,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:32:04,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820353128] [2020-11-07 01:32:04,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:32:04,339 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:32:04,523 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:32:04,719 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:32:05,070 WARN L194 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2020-11-07 01:32:06,989 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:32:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:32:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:32:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:32:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:32:08,372 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-07 01:32:09,638 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-11-07 01:32:09,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820353128] [2020-11-07 01:32:09,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:32:09,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-11-07 01:32:09,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936354263] [2020-11-07 01:32:09,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-07 01:32:09,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:32:09,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-07 01:32:09,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 01:32:09,644 INFO L87 Difference]: Start difference. First operand 3863 states and 4988 transitions. Second operand 28 states. [2020-11-07 01:32:09,965 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:32:10,146 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:32:10,306 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:10,458 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:32:10,631 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:32:10,807 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:32:10,991 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:32:11,200 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-11-07 01:32:11,372 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:12,166 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:32:12,393 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:32:12,719 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:32:12,940 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:32:14,823 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:32:16,352 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:32:16,740 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:32:17,497 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-11-07 01:32:18,387 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:32:18,946 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:19,274 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:32:24,888 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:32:25,673 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-07 01:32:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:32:32,021 INFO L93 Difference]: Finished difference Result 9146 states and 11961 transitions. [2020-11-07 01:32:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 01:32:32,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 250 [2020-11-07 01:32:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:32:32,054 INFO L225 Difference]: With dead ends: 9146 [2020-11-07 01:32:32,054 INFO L226 Difference]: Without dead ends: 5619 [2020-11-07 01:32:32,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1378, Invalid=3878, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 01:32:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2020-11-07 01:32:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5149. [2020-11-07 01:32:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5149 states. [2020-11-07 01:32:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 6543 transitions. [2020-11-07 01:32:34,364 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 6543 transitions. Word has length 250 [2020-11-07 01:32:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:32:34,364 INFO L481 AbstractCegarLoop]: Abstraction has 5149 states and 6543 transitions. [2020-11-07 01:32:34,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-07 01:32:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 6543 transitions. [2020-11-07 01:32:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-11-07 01:32:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:32:34,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:32:34,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:32:34,386 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:32:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:32:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1051349740, now seen corresponding path program 1 times [2020-11-07 01:32:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:32:34,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777759295] [2020-11-07 01:32:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:32:34,705 WARN L194 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 39 [2020-11-07 01:32:35,002 WARN L194 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 42 [2020-11-07 01:32:35,357 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2020-11-07 01:32:36,893 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:32:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:32:37,423 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-11-07 01:32:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:32:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:32:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:32:38,718 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-07 01:32:38,986 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-07 01:32:41,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777759295] [2020-11-07 01:32:41,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:32:41,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-11-07 01:32:41,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670656693] [2020-11-07 01:32:41,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-07 01:32:41,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:32:41,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-07 01:32:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 01:32:41,845 INFO L87 Difference]: Start difference. First operand 5149 states and 6543 transitions. Second operand 32 states. [2020-11-07 01:32:42,179 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:32:42,412 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:42,596 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:32:42,774 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:42,975 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:32:43,173 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:32:43,379 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:32:43,651 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-11-07 01:32:44,073 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-11-07 01:32:44,553 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-11-07 01:32:44,858 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:32:45,321 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:32:46,402 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:32:46,674 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:32:46,926 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:32:47,597 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:32:47,929 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-11-07 01:32:51,829 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:32:57,381 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:32:58,142 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-07 01:33:00,594 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:33:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:33:08,836 INFO L93 Difference]: Finished difference Result 11513 states and 14713 transitions. [2020-11-07 01:33:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 01:33:08,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 254 [2020-11-07 01:33:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:33:08,869 INFO L225 Difference]: With dead ends: 11513 [2020-11-07 01:33:08,870 INFO L226 Difference]: Without dead ends: 6700 [2020-11-07 01:33:08,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 53 SyntacticMatches, 47 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2020-11-07 01:33:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2020-11-07 01:33:11,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 6116. [2020-11-07 01:33:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6116 states. [2020-11-07 01:33:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 7702 transitions. [2020-11-07 01:33:11,506 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 7702 transitions. Word has length 254 [2020-11-07 01:33:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:33:11,506 INFO L481 AbstractCegarLoop]: Abstraction has 6116 states and 7702 transitions. [2020-11-07 01:33:11,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-07 01:33:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 7702 transitions. [2020-11-07 01:33:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-11-07 01:33:11,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:33:11,575 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:33:11,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:33:11,575 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:33:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:33:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash 792221161, now seen corresponding path program 1 times [2020-11-07 01:33:11,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:33:11,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079215701] [2020-11-07 01:33:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:33:11,844 WARN L194 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:33:12,022 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:33:12,227 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:33:12,404 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 33 [2020-11-07 01:33:12,739 WARN L194 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:33:14,777 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:33:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:33:15,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:33:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:33:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:33:16,685 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-11-07 01:33:17,982 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-07 01:33:18,628 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:33:18,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079215701] [2020-11-07 01:33:18,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:33:18,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 01:33:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840738331] [2020-11-07 01:33:18,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 01:33:18,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:33:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 01:33:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:33:18,634 INFO L87 Difference]: Start difference. First operand 6116 states and 7702 transitions. Second operand 38 states. [2020-11-07 01:33:18,966 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:33:19,203 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:33:19,388 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:33:19,565 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:33:19,774 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:33:19,972 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:33:20,174 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:33:20,383 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:33:21,195 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:33:21,442 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:33:21,769 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:33:21,969 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:33:25,235 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:33:25,384 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:33:25,970 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-11-07 01:33:28,614 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:33:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:33:39,934 INFO L93 Difference]: Finished difference Result 11618 states and 14744 transitions. [2020-11-07 01:33:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-07 01:33:39,935 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 270 [2020-11-07 01:33:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:33:39,970 INFO L225 Difference]: With dead ends: 11618 [2020-11-07 01:33:39,970 INFO L226 Difference]: Without dead ends: 6799 [2020-11-07 01:33:39,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 95 SyntacticMatches, 24 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2020-11-07 01:33:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6799 states. [2020-11-07 01:33:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 6274. [2020-11-07 01:33:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6274 states. [2020-11-07 01:33:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 7864 transitions. [2020-11-07 01:33:42,645 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 7864 transitions. Word has length 270 [2020-11-07 01:33:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:33:42,645 INFO L481 AbstractCegarLoop]: Abstraction has 6274 states and 7864 transitions. [2020-11-07 01:33:42,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 01:33:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 7864 transitions. [2020-11-07 01:33:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-11-07 01:33:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:33:42,660 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:33:42,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:33:42,661 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:33:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:33:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1089524311, now seen corresponding path program 1 times [2020-11-07 01:33:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:33:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515685813] [2020-11-07 01:33:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:33:42,944 WARN L194 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:33:43,318 WARN L194 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-11-07 01:33:43,532 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:33:43,869 WARN L194 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2020-11-07 01:33:45,975 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:33:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:33:46,535 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:33:46,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:33:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:33:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:33:47,017 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-11-07 01:33:47,896 WARN L194 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-07 01:33:48,575 WARN L194 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:33:49,291 WARN L194 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:33:50,059 WARN L194 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-11-07 01:33:50,749 WARN L194 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-07 01:33:51,205 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 01:33:52,167 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-11-07 01:33:54,891 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:33:56,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515685813] [2020-11-07 01:33:56,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:33:56,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 01:33:56,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638682455] [2020-11-07 01:33:56,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 01:33:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:33:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 01:33:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1765, Unknown=2, NotChecked=0, Total=2070 [2020-11-07 01:33:56,642 INFO L87 Difference]: Start difference. First operand 6274 states and 7864 transitions. Second operand 43 states. [2020-11-07 01:33:57,047 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:33:57,353 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:33:57,560 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:33:57,763 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:33:57,990 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:33:58,222 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:33:58,458 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:33:58,783 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-11-07 01:33:59,218 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:33:59,876 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:34:00,385 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:34:00,683 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:34:01,835 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:34:02,429 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 99 [2020-11-07 01:34:04,585 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:34:04,962 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:34:06,673 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:34:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:34:25,618 INFO L93 Difference]: Finished difference Result 11631 states and 14778 transitions. [2020-11-07 01:34:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-07 01:34:25,620 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 269 [2020-11-07 01:34:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:34:25,654 INFO L225 Difference]: With dead ends: 11631 [2020-11-07 01:34:25,654 INFO L226 Difference]: Without dead ends: 6717 [2020-11-07 01:34:25,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 55 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=504, Invalid=3400, Unknown=2, NotChecked=0, Total=3906 [2020-11-07 01:34:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2020-11-07 01:34:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 6435. [2020-11-07 01:34:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6435 states. [2020-11-07 01:34:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 8039 transitions. [2020-11-07 01:34:28,296 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 8039 transitions. Word has length 269 [2020-11-07 01:34:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:34:28,296 INFO L481 AbstractCegarLoop]: Abstraction has 6435 states and 8039 transitions. [2020-11-07 01:34:28,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 01:34:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 8039 transitions. [2020-11-07 01:34:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-11-07 01:34:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:34:28,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:34:28,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:34:28,313 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:34:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:34:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1973184100, now seen corresponding path program 1 times [2020-11-07 01:34:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:34:28,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491219559] [2020-11-07 01:34:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:34:28,674 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 39 [2020-11-07 01:34:29,065 WARN L194 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:34:29,300 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-11-07 01:34:29,713 WARN L194 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:34:31,730 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:34:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:34:32,197 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2020-11-07 01:34:32,745 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:34:32,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:34:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:34:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:34:34,139 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-11-07 01:34:34,407 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 116 [2020-11-07 01:34:35,081 WARN L194 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 119 [2020-11-07 01:34:35,498 WARN L194 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2020-11-07 01:34:36,114 WARN L194 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 121 [2020-11-07 01:34:36,983 WARN L194 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2020-11-07 01:34:38,533 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2020-11-07 01:34:39,871 WARN L194 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 125 [2020-11-07 01:34:40,490 WARN L194 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2020-11-07 01:34:40,980 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 97 [2020-11-07 01:34:42,591 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-07 01:34:43,987 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:34:45,861 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:34:48,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491219559] [2020-11-07 01:34:48,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:34:48,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 01:34:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999655935] [2020-11-07 01:34:48,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 01:34:48,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:34:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 01:34:48,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 01:34:48,629 INFO L87 Difference]: Start difference. First operand 6435 states and 8039 transitions. Second operand 49 states. [2020-11-07 01:34:49,226 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:34:49,774 WARN L194 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 94 [2020-11-07 01:34:50,214 WARN L194 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 96 [2020-11-07 01:34:50,633 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 94 [2020-11-07 01:34:51,116 WARN L194 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 100 [2020-11-07 01:34:51,635 WARN L194 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2020-11-07 01:34:52,233 WARN L194 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 174 [2020-11-07 01:34:53,015 WARN L194 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 186 [2020-11-07 01:34:54,142 WARN L194 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 189 [2020-11-07 01:34:55,115 WARN L194 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2020-11-07 01:34:56,633 WARN L194 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 193 [2020-11-07 01:34:56,977 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:34:58,233 WARN L194 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 193 [2020-11-07 01:34:59,801 WARN L194 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 196 [2020-11-07 01:35:00,769 WARN L194 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 189 [2020-11-07 01:35:01,189 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-11-07 01:35:03,444 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:35:03,849 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:35:04,254 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:35:06,096 WARN L194 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 114 [2020-11-07 01:35:08,298 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:35:08,722 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:35:13,248 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:35:22,678 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:35:24,005 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:35:27,557 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:35:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:35:51,143 INFO L93 Difference]: Finished difference Result 15792 states and 20317 transitions. [2020-11-07 01:35:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 01:35:51,146 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 272 [2020-11-07 01:35:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:35:51,196 INFO L225 Difference]: With dead ends: 15792 [2020-11-07 01:35:51,197 INFO L226 Difference]: Without dead ends: 10570 [2020-11-07 01:35:51,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 65 SyntacticMatches, 45 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2020-11-07 01:35:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2020-11-07 01:35:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 9260. [2020-11-07 01:35:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9260 states. [2020-11-07 01:35:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9260 states to 9260 states and 11449 transitions. [2020-11-07 01:35:55,472 INFO L78 Accepts]: Start accepts. Automaton has 9260 states and 11449 transitions. Word has length 272 [2020-11-07 01:35:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:35:55,473 INFO L481 AbstractCegarLoop]: Abstraction has 9260 states and 11449 transitions. [2020-11-07 01:35:55,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 01:35:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9260 states and 11449 transitions. [2020-11-07 01:35:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 01:35:55,498 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:35:55,498 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:35:55,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:35:55,498 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:35:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:35:55,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1972887976, now seen corresponding path program 1 times [2020-11-07 01:35:55,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:35:55,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888028864] [2020-11-07 01:35:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:35:55,859 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:35:56,095 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:35:56,660 WARN L194 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 33 [2020-11-07 01:35:57,143 WARN L194 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 41 [2020-11-07 01:35:59,075 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:35:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:35:59,741 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:35:59,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:35:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:35:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:36:00,299 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-07 01:36:01,521 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-07 01:36:02,176 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-11-07 01:36:05,170 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-11-07 01:36:05,895 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-11-07 01:36:06,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888028864] [2020-11-07 01:36:06,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:36:06,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-11-07 01:36:06,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928636854] [2020-11-07 01:36:06,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-07 01:36:06,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:36:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-07 01:36:06,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1512, Unknown=0, NotChecked=0, Total=1892 [2020-11-07 01:36:06,903 INFO L87 Difference]: Start difference. First operand 9260 states and 11449 transitions. Second operand 38 states. [2020-11-07 01:36:07,382 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-11-07 01:36:07,697 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:36:07,954 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:36:08,187 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:36:08,473 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:36:08,761 WARN L194 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:36:09,062 WARN L194 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:36:09,345 WARN L194 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:36:10,349 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:36:10,670 WARN L194 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:36:11,113 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:36:11,404 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:36:13,755 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:36:14,003 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:36:15,717 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:36:16,039 WARN L194 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:36:16,583 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:36:17,027 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:36:17,290 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:36:17,752 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-11-07 01:36:20,114 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:36:21,923 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:36:22,566 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-11-07 01:36:23,217 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-07 01:36:26,286 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:36:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:36:42,696 INFO L93 Difference]: Finished difference Result 18408 states and 22797 transitions. [2020-11-07 01:36:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 01:36:42,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 277 [2020-11-07 01:36:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:36:42,748 INFO L225 Difference]: With dead ends: 18408 [2020-11-07 01:36:42,749 INFO L226 Difference]: Without dead ends: 10464 [2020-11-07 01:36:42,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 58 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4160 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=803, Invalid=4027, Unknown=0, NotChecked=0, Total=4830 [2020-11-07 01:36:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10464 states. [2020-11-07 01:36:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10464 to 9432. [2020-11-07 01:36:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9432 states. [2020-11-07 01:36:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 11625 transitions. [2020-11-07 01:36:47,333 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 11625 transitions. Word has length 277 [2020-11-07 01:36:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:36:47,333 INFO L481 AbstractCegarLoop]: Abstraction has 9432 states and 11625 transitions. [2020-11-07 01:36:47,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-07 01:36:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 11625 transitions. [2020-11-07 01:36:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 01:36:47,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:36:47,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:36:47,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:36:47,356 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:36:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:36:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash -529522612, now seen corresponding path program 1 times [2020-11-07 01:36:47,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:36:47,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332005137] [2020-11-07 01:36:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:36:47,761 WARN L194 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2020-11-07 01:36:48,533 WARN L194 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 38 [2020-11-07 01:36:49,016 WARN L194 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:36:50,894 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:36:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:36:51,503 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:36:51,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:36:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:36:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:36:51,970 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-11-07 01:36:52,502 WARN L194 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-07 01:36:52,852 WARN L194 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-11-07 01:36:53,336 WARN L194 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-11-07 01:36:53,905 WARN L194 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-11-07 01:36:54,412 WARN L194 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-11-07 01:36:55,007 WARN L194 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-11-07 01:36:55,672 WARN L194 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-11-07 01:36:56,693 WARN L194 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-11-07 01:36:57,670 WARN L194 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-11-07 01:36:58,729 WARN L194 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-11-07 01:37:00,040 WARN L194 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-11-07 01:37:00,986 WARN L194 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-11-07 01:37:02,401 WARN L194 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-11-07 01:37:03,513 WARN L194 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-11-07 01:37:04,652 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-11-07 01:37:05,968 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-11-07 01:37:07,402 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-11-07 01:37:08,839 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-11-07 01:37:10,341 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-11-07 01:37:11,796 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-11-07 01:37:13,448 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-11-07 01:37:15,031 WARN L194 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-11-07 01:37:16,889 WARN L194 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-11-07 01:37:18,620 WARN L194 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-11-07 01:37:20,333 WARN L194 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-11-07 01:37:22,135 WARN L194 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 87 DAG size of output: 86 [2020-11-07 01:37:24,782 WARN L194 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-11-07 01:37:27,206 WARN L194 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-11-07 01:37:29,230 WARN L194 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-11-07 01:37:31,249 WARN L194 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-11-07 01:37:31,887 WARN L194 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 23 [2020-11-07 01:37:34,630 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-11-07 01:37:38,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332005137] [2020-11-07 01:37:38,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:37:38,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-11-07 01:37:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070132058] [2020-11-07 01:37:38,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 01:37:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:37:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 01:37:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1323, Invalid=1983, Unknown=0, NotChecked=0, Total=3306 [2020-11-07 01:37:38,363 INFO L87 Difference]: Start difference. First operand 9432 states and 11625 transitions. Second operand 55 states. [2020-11-07 01:37:38,714 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:37:38,942 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:37:39,141 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-11-07 01:37:39,325 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:37:39,546 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:37:39,775 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-11-07 01:37:40,011 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:37:40,308 WARN L194 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-11-07 01:37:40,681 WARN L194 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-11-07 01:37:41,168 WARN L194 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-11-07 01:37:41,642 WARN L194 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-11-07 01:37:42,204 WARN L194 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-11-07 01:37:42,793 WARN L194 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-11-07 01:37:43,372 WARN L194 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-11-07 01:37:44,105 WARN L194 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-11-07 01:37:44,792 WARN L194 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-11-07 01:37:45,526 WARN L194 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:37:46,347 WARN L194 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-11-07 01:37:47,079 WARN L194 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-11-07 01:37:47,936 WARN L194 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-11-07 01:37:48,736 WARN L194 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-11-07 01:37:49,570 WARN L194 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-11-07 01:37:50,502 WARN L194 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-11-07 01:37:51,364 WARN L194 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-11-07 01:37:52,300 WARN L194 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:37:53,250 WARN L194 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-11-07 01:37:54,272 WARN L194 SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-11-07 01:37:55,238 WARN L194 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-11-07 01:37:56,247 WARN L194 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-11-07 01:37:57,427 WARN L194 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:37:58,536 WARN L194 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-11-07 01:37:59,720 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 160 [2020-11-07 01:38:00,846 WARN L194 SmtUtils]: Spent 955.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-11-07 01:38:02,240 WARN L194 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 162 [2020-11-07 01:38:03,541 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 163 [2020-11-07 01:38:04,865 WARN L194 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 164 [2020-11-07 01:38:06,087 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 165 [2020-11-07 01:38:06,380 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:38:06,881 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-11-07 01:38:07,262 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-11-07 01:38:07,925 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:38:08,259 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:38:10,097 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:38:11,462 WARN L194 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 105 [2020-11-07 01:38:11,795 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:38:13,011 WARN L194 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 103 [2020-11-07 01:38:13,817 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-11-07 01:38:14,653 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-11-07 01:38:18,360 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-11-07 01:38:19,591 WARN L194 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:38:19,999 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:38:21,148 WARN L194 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:38:21,894 WARN L194 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:38:22,690 WARN L194 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:38:26,911 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:38:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:38:34,666 INFO L93 Difference]: Finished difference Result 20668 states and 26285 transitions. [2020-11-07 01:38:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-11-07 01:38:34,669 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 277 [2020-11-07 01:38:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:38:34,718 INFO L225 Difference]: With dead ends: 20668 [2020-11-07 01:38:34,718 INFO L226 Difference]: Without dead ends: 12724 [2020-11-07 01:38:34,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 61 SyntacticMatches, 44 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 80.6s TimeCoverageRelationStatistics Valid=3923, Invalid=10357, Unknown=0, NotChecked=0, Total=14280 [2020-11-07 01:38:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12724 states. [2020-11-07 01:38:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12724 to 10657. [2020-11-07 01:38:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10657 states. [2020-11-07 01:38:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10657 states to 10657 states and 13009 transitions. [2020-11-07 01:38:40,239 INFO L78 Accepts]: Start accepts. Automaton has 10657 states and 13009 transitions. Word has length 277 [2020-11-07 01:38:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:38:40,240 INFO L481 AbstractCegarLoop]: Abstraction has 10657 states and 13009 transitions. [2020-11-07 01:38:40,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 01:38:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 10657 states and 13009 transitions. [2020-11-07 01:38:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-11-07 01:38:40,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:38:40,256 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:38:40,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:38:40,257 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:38:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:38:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 627641716, now seen corresponding path program 1 times [2020-11-07 01:38:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:38:40,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316852141] [2020-11-07 01:38:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:38:40,559 WARN L194 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 42 [2020-11-07 01:38:40,813 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-11-07 01:38:41,292 WARN L194 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2020-11-07 01:38:41,685 WARN L194 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:38:43,183 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 118 [2020-11-07 01:38:43,353 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 01:38:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:38:44,148 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:38:44,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:38:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:38:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:38:45,727 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-07 01:38:46,361 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-11-07 01:38:48,149 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-11-07 01:38:49,519 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-11-07 01:38:49,829 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-11-07 01:38:50,420 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-11-07 01:38:51,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316852141] [2020-11-07 01:38:51,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:38:51,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 01:38:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682857579] [2020-11-07 01:38:51,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 01:38:51,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:38:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 01:38:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2020-11-07 01:38:51,657 INFO L87 Difference]: Start difference. First operand 10657 states and 13009 transitions. Second operand 41 states. [2020-11-07 01:38:52,134 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-11-07 01:38:52,483 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:38:52,728 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:38:52,958 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-11-07 01:38:53,210 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:38:53,467 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:38:53,724 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-11-07 01:38:54,001 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-07 01:38:55,205 WARN L194 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:38:55,520 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-11-07 01:38:56,000 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:38:56,282 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:38:58,721 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-11-07 01:38:59,574 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:39:01,004 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-11-07 01:39:01,401 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:39:01,838 WARN L194 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-11-07 01:39:02,242 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-11-07 01:39:03,049 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-11-07 01:39:05,042 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:39:08,793 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-11-07 01:39:11,563 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:39:15,526 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:39:23,829 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-07 01:39:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:39:32,612 INFO L93 Difference]: Finished difference Result 20843 states and 25662 transitions. [2020-11-07 01:39:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 01:39:32,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 282 [2020-11-07 01:39:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:39:32,655 INFO L225 Difference]: With dead ends: 20843 [2020-11-07 01:39:32,656 INFO L226 Difference]: Without dead ends: 11692 [2020-11-07 01:39:32,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 61 SyntacticMatches, 61 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4528 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2020-11-07 01:39:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11692 states. [2020-11-07 01:39:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11692 to 10811. [2020-11-07 01:39:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10811 states. [2020-11-07 01:39:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 13170 transitions. [2020-11-07 01:39:38,069 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 13170 transitions. Word has length 282 [2020-11-07 01:39:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:39:38,069 INFO L481 AbstractCegarLoop]: Abstraction has 10811 states and 13170 transitions. [2020-11-07 01:39:38,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 01:39:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 13170 transitions. [2020-11-07 01:39:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-11-07 01:39:38,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:39:38,087 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:39:38,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:39:38,087 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:39:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:39:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -592160356, now seen corresponding path program 1 times [2020-11-07 01:39:38,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:39:38,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063873401] [2020-11-07 01:39:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:39:38,458 WARN L194 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 42 [2020-11-07 01:39:38,823 WARN L194 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 39 [2020-11-07 01:39:39,108 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 38 [2020-11-07 01:39:39,555 WARN L194 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-11-07 01:39:39,622 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:39:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:39,923 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-11-07 01:39:39,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:39:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-07 01:39:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-07 01:39:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-11-07 01:39:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-07 01:39:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-11-07 01:39:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:39:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:39:40,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063873401] [2020-11-07 01:39:40,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:39:40,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 01:39:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352036112] [2020-11-07 01:39:40,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 01:39:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:39:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 01:39:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-07 01:39:40,390 INFO L87 Difference]: Start difference. First operand 10811 states and 13170 transitions. Second operand 12 states. [2020-11-07 01:39:41,197 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-11-07 01:39:41,643 WARN L194 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-11-07 01:39:42,440 WARN L194 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-11-07 01:39:42,709 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-11-07 01:39:43,883 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:39:44,899 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:39:46,359 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:39:47,469 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:39:47,924 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-11-07 01:39:48,546 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-07 01:39:51,051 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-11-07 01:39:52,505 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-07 01:39:53,082 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-11-07 01:39:55,848 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-11-07 01:40:01,943 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 87