/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:47:51,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:47:51,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:47:51,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:47:51,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:47:51,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:47:51,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:47:51,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:47:51,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:47:51,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:47:51,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:47:51,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:47:51,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:47:51,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:47:51,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:47:51,185 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:47:51,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:47:51,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:47:51,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:47:51,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:47:51,186 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:47:51,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:47:51,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:47:51,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:51,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:47:51,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:47:51,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:47:51,188 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:47:51,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:47:51,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:47:51,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:47:51,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:47:51,607 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:47:51,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-02-23 18:47:51,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/653acd80d/0bdb2cbb6b154312b831846e4f72f881/FLAGa9451db67 [2021-02-23 18:47:52,392 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:47:52,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-02-23 18:47:52,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/653acd80d/0bdb2cbb6b154312b831846e4f72f881/FLAGa9451db67 [2021-02-23 18:47:52,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/653acd80d/0bdb2cbb6b154312b831846e4f72f881 [2021-02-23 18:47:52,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:47:52,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:47:52,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:52,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:47:52,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:47:52,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:52" (1/1) ... [2021-02-23 18:47:52,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7841d8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:52, skipping insertion in model container [2021-02-23 18:47:52,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:52" (1/1) ... [2021-02-23 18:47:52,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:47:52,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:47:53,035 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-02-23 18:47:53,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:53,161 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:47:53,188 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-02-23 18:47:53,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:53,280 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:47:53,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53 WrapperNode [2021-02-23 18:47:53,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:53,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:47:53,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:47:53,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:47:53,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... [2021-02-23 18:47:53,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:47:53,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:47:53,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:47:53,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:47:53,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:53,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:47:53,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:47:53,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:47:53,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:47:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:47:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:47:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:47:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:47:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:47:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:47:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:47:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:47:53,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:47:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-02-23 18:47:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:47:53,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:47:54,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:47:54,034 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-23 18:47:54,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:54 BoogieIcfgContainer [2021-02-23 18:47:54,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:47:54,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:47:54,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:47:54,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:47:54,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:47:52" (1/3) ... [2021-02-23 18:47:54,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3d8829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:54, skipping insertion in model container [2021-02-23 18:47:54,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:53" (2/3) ... [2021-02-23 18:47:54,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a3d8829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:54, skipping insertion in model container [2021-02-23 18:47:54,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:54" (3/3) ... [2021-02-23 18:47:54,053 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-02-23 18:47:54,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:47:54,066 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:47:54,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:47:54,113 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:47:54,113 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:47:54,114 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:47:54,114 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:47:54,114 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:47:54,114 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:47:54,114 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:47:54,115 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:47:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 18:47:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 18:47:54,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:54,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:54,142 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1876603401, now seen corresponding path program 1 times [2021-02-23 18:47:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:54,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066207374] [2021-02-23 18:47:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:54,242 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:54,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:54,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:54,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:54,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:54,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066207374] [2021-02-23 18:47:54,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:54,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:47:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904970843] [2021-02-23 18:47:54,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:47:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:54,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:47:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:47:54,553 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2021-02-23 18:47:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:54,769 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-02-23 18:47:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:47:54,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-23 18:47:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:54,788 INFO L225 Difference]: With dead ends: 104 [2021-02-23 18:47:54,789 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 18:47:54,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:47:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 18:47:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-02-23 18:47:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 18:47:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-23 18:47:54,842 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 25 [2021-02-23 18:47:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:54,843 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-23 18:47:54,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:47:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-23 18:47:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 18:47:54,844 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:54,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:54,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:47:54,845 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1876644724, now seen corresponding path program 1 times [2021-02-23 18:47:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:54,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95476293] [2021-02-23 18:47:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:54,850 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:54,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:54,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:54,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:54,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:55,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:55,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95476293] [2021-02-23 18:47:55,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:55,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:47:55,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298850912] [2021-02-23 18:47:55,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:47:55,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:47:55,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:47:55,068 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2021-02-23 18:47:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:55,326 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-02-23 18:47:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:47:55,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 18:47:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:55,329 INFO L225 Difference]: With dead ends: 93 [2021-02-23 18:47:55,329 INFO L226 Difference]: Without dead ends: 90 [2021-02-23 18:47:55,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-23 18:47:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2021-02-23 18:47:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 18:47:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-23 18:47:55,344 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 25 [2021-02-23 18:47:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:55,344 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-23 18:47:55,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:47:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-23 18:47:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:47:55,346 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:55,346 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] [2021-02-23 18:47:55,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:47:55,346 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:55,347 INFO L82 PathProgramCache]: Analyzing trace with hash 823473260, now seen corresponding path program 1 times [2021-02-23 18:47:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:55,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934341276] [2021-02-23 18:47:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:55,373 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:55,376 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:55,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:55,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:55,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:55,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934341276] [2021-02-23 18:47:55,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:55,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:47:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725208124] [2021-02-23 18:47:55,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:47:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:47:55,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:47:55,510 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2021-02-23 18:47:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:55,693 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-02-23 18:47:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:47:55,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-23 18:47:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:55,695 INFO L225 Difference]: With dead ends: 105 [2021-02-23 18:47:55,695 INFO L226 Difference]: Without dead ends: 83 [2021-02-23 18:47:55,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-23 18:47:55,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2021-02-23 18:47:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 18:47:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-23 18:47:55,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2021-02-23 18:47:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:55,708 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-23 18:47:55,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:47:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-23 18:47:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 18:47:55,709 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:55,710 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] [2021-02-23 18:47:55,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:47:55,710 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:55,711 INFO L82 PathProgramCache]: Analyzing trace with hash 885163707, now seen corresponding path program 1 times [2021-02-23 18:47:55,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:55,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937489126] [2021-02-23 18:47:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:55,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,721 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:55,725 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:55,726 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:55,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:55,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:55,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:47:55,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937489126] [2021-02-23 18:47:55,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:55,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:47:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810180941] [2021-02-23 18:47:55,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:47:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:47:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:47:55,820 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2021-02-23 18:47:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:55,969 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-02-23 18:47:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:47:55,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-23 18:47:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:55,971 INFO L225 Difference]: With dead ends: 84 [2021-02-23 18:47:55,971 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 18:47:55,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 18:47:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2021-02-23 18:47:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 18:47:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-02-23 18:47:55,981 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2021-02-23 18:47:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:55,981 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-02-23 18:47:55,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:47:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-02-23 18:47:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 18:47:55,983 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:55,983 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] [2021-02-23 18:47:55,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:47:55,983 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2143964361, now seen corresponding path program 1 times [2021-02-23 18:47:55,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:55,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607609042] [2021-02-23 18:47:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:55,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:55,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:56,042 WARN L141 QuantifierPusher]: treesize reduction 30, result has 86.4 percent of original size [2021-02-23 18:47:56,066 INFO L424 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 1] term [2021-02-23 18:47:56,066 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-23 18:47:56,071 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:56,079 WARN L147 QuantifierPusher]: treesize reduction 30, result has 86.4 percent of original size 191 [2021-02-23 18:47:56,927 WARN L202 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 91