/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:25:39,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:25:39,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:25:39,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:25:39,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:25:39,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:25:39,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:25:39,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:25:39,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:25:39,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:25:39,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:25:39,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:25:39,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:25:39,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:25:39,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:25:39,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:25:39,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:25:39,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:25:39,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:25:39,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:25:39,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:25:39,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:25:39,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:25:39,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:25:39,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:25:39,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:25:39,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:25:39,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:25:39,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:25:39,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:25:39,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:25:39,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:25:39,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:25:39,622 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:25:39,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:25:39,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:25:39,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:25:39,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:25:39,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:25:39,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:25:39,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:25:39,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:25:39,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:25:39,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:25:39,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:25:39,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:25:39,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:25:39,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:25:39,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:25:39,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:25:39,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:25:39,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:25:39,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:25:39,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:25:39,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:25:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:25:39,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:25:39,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:25:39,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:25:40,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:25:40,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:25:40,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:25:40,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:25:40,177 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:25:40,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-21 10:25:40,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b53412b51/34eb798709b44af9b14acb1531416b95/FLAG73cb0291d [2020-09-21 10:25:40,940 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:25:40,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-21 10:25:40,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b53412b51/34eb798709b44af9b14acb1531416b95/FLAG73cb0291d [2020-09-21 10:25:41,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b53412b51/34eb798709b44af9b14acb1531416b95 [2020-09-21 10:25:41,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:25:41,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:25:41,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:41,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:25:41,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:25:41,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:41" (1/1) ... [2020-09-21 10:25:41,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447ed8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:41, skipping insertion in model container [2020-09-21 10:25:41,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:41" (1/1) ... [2020-09-21 10:25:41,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:25:41,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:25:42,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:42,067 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:25:42,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:42,330 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:25:42,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42 WrapperNode [2020-09-21 10:25:42,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:42,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:25:42,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:25:42,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:25:42,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... [2020-09-21 10:25:42,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:25:42,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:25:42,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:25:42,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:25:42,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:25:42,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:25:42,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:25:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 10:25:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:25:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 10:25:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:25:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:25:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:25:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:25:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:25:42,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:25:44,646 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:25:44,646 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:25:44,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:44 BoogieIcfgContainer [2020-09-21 10:25:44,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:25:44,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:25:44,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:25:44,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:25:44,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:25:41" (1/3) ... [2020-09-21 10:25:44,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee463f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:44, skipping insertion in model container [2020-09-21 10:25:44,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:42" (2/3) ... [2020-09-21 10:25:44,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee463f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:44, skipping insertion in model container [2020-09-21 10:25:44,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:44" (3/3) ... [2020-09-21 10:25:44,667 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-21 10:25:44,682 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:25:44,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:25:44,721 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:25:44,760 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:25:44,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:25:44,761 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:25:44,761 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:25:44,761 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:25:44,761 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:25:44,761 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:25:44,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:25:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2020-09-21 10:25:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:25:44,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:44,806 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] [2020-09-21 10:25:44,807 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1626993173, now seen corresponding path program 1 times [2020-09-21 10:25:44,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:44,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088755625] [2020-09-21 10:25:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:25:45,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088755625] [2020-09-21 10:25:45,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:25:45,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891870625] [2020-09-21 10:25:45,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:25:45,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:45,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:25:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:25:45,314 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2020-09-21 10:25:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:48,787 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2020-09-21 10:25:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:25:48,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-09-21 10:25:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:48,821 INFO L225 Difference]: With dead ends: 998 [2020-09-21 10:25:48,822 INFO L226 Difference]: Without dead ends: 638 [2020-09-21 10:25:48,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-09-21 10:25:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2020-09-21 10:25:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-21 10:25:48,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2020-09-21 10:25:48,962 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 40 [2020-09-21 10:25:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:48,962 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2020-09-21 10:25:48,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:25:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2020-09-21 10:25:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-21 10:25:48,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:48,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-21 10:25:48,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:25:48,969 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1781272370, now seen corresponding path program 1 times [2020-09-21 10:25:48,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:48,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949547774] [2020-09-21 10:25:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:49,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:49,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:25:49,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949547774] [2020-09-21 10:25:49,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:49,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:25:49,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363667960] [2020-09-21 10:25:49,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:25:49,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:25:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:49,319 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 7 states. [2020-09-21 10:25:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:52,461 INFO L93 Difference]: Finished difference Result 1865 states and 2955 transitions. [2020-09-21 10:25:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:25:52,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-09-21 10:25:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:52,472 INFO L225 Difference]: With dead ends: 1865 [2020-09-21 10:25:52,472 INFO L226 Difference]: Without dead ends: 1250 [2020-09-21 10:25:52,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:25:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2020-09-21 10:25:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1217. [2020-09-21 10:25:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2020-09-21 10:25:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1704 transitions. [2020-09-21 10:25:52,548 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1704 transitions. Word has length 110 [2020-09-21 10:25:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:52,548 INFO L479 AbstractCegarLoop]: Abstraction has 1217 states and 1704 transitions. [2020-09-21 10:25:52,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:25:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1704 transitions. [2020-09-21 10:25:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-21 10:25:52,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:52,555 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-21 10:25:52,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:25:52,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 559014170, now seen corresponding path program 1 times [2020-09-21 10:25:52,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:52,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886717931] [2020-09-21 10:25:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:52,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:52,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:25:52,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886717931] [2020-09-21 10:25:52,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:52,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:25:52,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330261047] [2020-09-21 10:25:52,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:25:52,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:25:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:52,860 INFO L87 Difference]: Start difference. First operand 1217 states and 1704 transitions. Second operand 7 states. [2020-09-21 10:25:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:56,142 INFO L93 Difference]: Finished difference Result 3652 states and 5269 transitions. [2020-09-21 10:25:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:25:56,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-09-21 10:25:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:56,160 INFO L225 Difference]: With dead ends: 3652 [2020-09-21 10:25:56,160 INFO L226 Difference]: Without dead ends: 2441 [2020-09-21 10:25:56,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:25:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2020-09-21 10:25:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2216. [2020-09-21 10:25:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2020-09-21 10:25:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 2966 transitions. [2020-09-21 10:25:56,244 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 2966 transitions. Word has length 120 [2020-09-21 10:25:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:56,245 INFO L479 AbstractCegarLoop]: Abstraction has 2216 states and 2966 transitions. [2020-09-21 10:25:56,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:25:56,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 2966 transitions. [2020-09-21 10:25:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-09-21 10:25:56,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:56,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:56,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:25:56,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash 384966816, now seen corresponding path program 1 times [2020-09-21 10:25:56,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:56,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894135595] [2020-09-21 10:25:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:56,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:56,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:56,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:25:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:25:56,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894135595] [2020-09-21 10:25:56,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:56,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:25:56,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483941270] [2020-09-21 10:25:56,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:25:56,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:25:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:25:56,657 INFO L87 Difference]: Start difference. First operand 2216 states and 2966 transitions. Second operand 7 states. [2020-09-21 10:25:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:25:59,385 INFO L93 Difference]: Finished difference Result 4487 states and 6072 transitions. [2020-09-21 10:25:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:25:59,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 183 [2020-09-21 10:25:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:25:59,405 INFO L225 Difference]: With dead ends: 4487 [2020-09-21 10:25:59,405 INFO L226 Difference]: Without dead ends: 2277 [2020-09-21 10:25:59,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:25:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-09-21 10:25:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2218. [2020-09-21 10:25:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2020-09-21 10:25:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2944 transitions. [2020-09-21 10:25:59,491 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2944 transitions. Word has length 183 [2020-09-21 10:25:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:25:59,491 INFO L479 AbstractCegarLoop]: Abstraction has 2218 states and 2944 transitions. [2020-09-21 10:25:59,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:25:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2944 transitions. [2020-09-21 10:25:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-21 10:25:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:59,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-21 10:25:59,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:25:59,499 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 240062387, now seen corresponding path program 1 times [2020-09-21 10:25:59,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:59,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247883764] [2020-09-21 10:25:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:59,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:59,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:25:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:59,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-21 10:25:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-21 10:25:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247883764] [2020-09-21 10:25:59,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:25:59,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:25:59,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280211724] [2020-09-21 10:25:59,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:25:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:59,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:25:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:25:59,920 INFO L87 Difference]: Start difference. First operand 2218 states and 2944 transitions. Second operand 5 states. [2020-09-21 10:26:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:02,435 INFO L93 Difference]: Finished difference Result 5592 states and 7708 transitions. [2020-09-21 10:26:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:02,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2020-09-21 10:26:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:02,465 INFO L225 Difference]: With dead ends: 5592 [2020-09-21 10:26:02,465 INFO L226 Difference]: Without dead ends: 3380 [2020-09-21 10:26:02,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2020-09-21 10:26:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3374. [2020-09-21 10:26:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3374 states. [2020-09-21 10:26:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 4588 transitions. [2020-09-21 10:26:02,567 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 4588 transitions. Word has length 236 [2020-09-21 10:26:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:02,568 INFO L479 AbstractCegarLoop]: Abstraction has 3374 states and 4588 transitions. [2020-09-21 10:26:02,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 4588 transitions. [2020-09-21 10:26:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-09-21 10:26:02,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:02,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-09-21 10:26:02,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:26:02,587 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1219984608, now seen corresponding path program 1 times [2020-09-21 10:26:02,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:02,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181714249] [2020-09-21 10:26:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:02,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:02,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-21 10:26:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-09-21 10:26:03,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181714249] [2020-09-21 10:26:03,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:03,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:26:03,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163609218] [2020-09-21 10:26:03,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:26:03,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:26:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:26:03,141 INFO L87 Difference]: Start difference. First operand 3374 states and 4588 transitions. Second operand 5 states. [2020-09-21 10:26:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:05,758 INFO L93 Difference]: Finished difference Result 8305 states and 11780 transitions. [2020-09-21 10:26:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:05,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2020-09-21 10:26:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:05,786 INFO L225 Difference]: With dead ends: 8305 [2020-09-21 10:26:05,787 INFO L226 Difference]: Without dead ends: 4937 [2020-09-21 10:26:05,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2020-09-21 10:26:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4920. [2020-09-21 10:26:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4920 states. [2020-09-21 10:26:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 6781 transitions. [2020-09-21 10:26:05,928 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 6781 transitions. Word has length 267 [2020-09-21 10:26:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:05,929 INFO L479 AbstractCegarLoop]: Abstraction has 4920 states and 6781 transitions. [2020-09-21 10:26:05,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 6781 transitions. [2020-09-21 10:26:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-09-21 10:26:05,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:05,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-09-21 10:26:05,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:26:05,938 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:05,939 INFO L82 PathProgramCache]: Analyzing trace with hash 630561712, now seen corresponding path program 1 times [2020-09-21 10:26:05,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:05,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241756737] [2020-09-21 10:26:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:26:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:26:06,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241756737] [2020-09-21 10:26:06,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:06,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:06,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102428412] [2020-09-21 10:26:06,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:06,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:06,427 INFO L87 Difference]: Start difference. First operand 4920 states and 6781 transitions. Second operand 7 states. [2020-09-21 10:26:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:09,643 INFO L93 Difference]: Finished difference Result 11238 states and 15944 transitions. [2020-09-21 10:26:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:09,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 278 [2020-09-21 10:26:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:09,681 INFO L225 Difference]: With dead ends: 11238 [2020-09-21 10:26:09,681 INFO L226 Difference]: Without dead ends: 6324 [2020-09-21 10:26:09,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2020-09-21 10:26:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6299. [2020-09-21 10:26:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6299 states. [2020-09-21 10:26:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 8983 transitions. [2020-09-21 10:26:09,898 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 8983 transitions. Word has length 278 [2020-09-21 10:26:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:09,899 INFO L479 AbstractCegarLoop]: Abstraction has 6299 states and 8983 transitions. [2020-09-21 10:26:09,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 8983 transitions. [2020-09-21 10:26:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-09-21 10:26:09,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:09,922 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-21 10:26:09,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:26:09,922 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash -844079456, now seen corresponding path program 1 times [2020-09-21 10:26:09,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:09,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835912484] [2020-09-21 10:26:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-21 10:26:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-21 10:26:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-21 10:26:10,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835912484] [2020-09-21 10:26:10,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:10,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:10,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519005197] [2020-09-21 10:26:10,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:10,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:10,608 INFO L87 Difference]: Start difference. First operand 6299 states and 8983 transitions. Second operand 7 states. [2020-09-21 10:26:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:13,628 INFO L93 Difference]: Finished difference Result 13852 states and 21148 transitions. [2020-09-21 10:26:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:26:13,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 336 [2020-09-21 10:26:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:13,672 INFO L225 Difference]: With dead ends: 13852 [2020-09-21 10:26:13,672 INFO L226 Difference]: Without dead ends: 7559 [2020-09-21 10:26:13,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2020-09-21 10:26:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 7254. [2020-09-21 10:26:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7254 states. [2020-09-21 10:26:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7254 states to 7254 states and 9795 transitions. [2020-09-21 10:26:13,928 INFO L78 Accepts]: Start accepts. Automaton has 7254 states and 9795 transitions. Word has length 336 [2020-09-21 10:26:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:13,929 INFO L479 AbstractCegarLoop]: Abstraction has 7254 states and 9795 transitions. [2020-09-21 10:26:13,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7254 states and 9795 transitions. [2020-09-21 10:26:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-09-21 10:26:13,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:13,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:13,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:26:13,958 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1109482027, now seen corresponding path program 1 times [2020-09-21 10:26:13,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:13,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695027516] [2020-09-21 10:26:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:14,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:14,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:14,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:26:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:14,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-09-21 10:26:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 107 proven. 199 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-21 10:26:14,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695027516] [2020-09-21 10:26:14,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:14,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:14,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469818544] [2020-09-21 10:26:14,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:14,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:14,732 INFO L87 Difference]: Start difference. First operand 7254 states and 9795 transitions. Second operand 9 states. [2020-09-21 10:26:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:20,856 INFO L93 Difference]: Finished difference Result 21860 states and 30381 transitions. [2020-09-21 10:26:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:26:20,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 380 [2020-09-21 10:26:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:20,919 INFO L225 Difference]: With dead ends: 21860 [2020-09-21 10:26:20,919 INFO L226 Difference]: Without dead ends: 14612 [2020-09-21 10:26:20,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:26:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14612 states. [2020-09-21 10:26:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14612 to 14366. [2020-09-21 10:26:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14366 states. [2020-09-21 10:26:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14366 states to 14366 states and 19092 transitions. [2020-09-21 10:26:21,307 INFO L78 Accepts]: Start accepts. Automaton has 14366 states and 19092 transitions. Word has length 380 [2020-09-21 10:26:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:21,308 INFO L479 AbstractCegarLoop]: Abstraction has 14366 states and 19092 transitions. [2020-09-21 10:26:21,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14366 states and 19092 transitions. [2020-09-21 10:26:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-09-21 10:26:21,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:21,465 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:21,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:26:21,466 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1364604881, now seen corresponding path program 1 times [2020-09-21 10:26:21,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:21,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659350419] [2020-09-21 10:26:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:26:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2020-09-21 10:26:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 107 proven. 206 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-09-21 10:26:22,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659350419] [2020-09-21 10:26:22,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:22,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:22,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662628298] [2020-09-21 10:26:22,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:22,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:22,169 INFO L87 Difference]: Start difference. First operand 14366 states and 19092 transitions. Second operand 9 states. [2020-09-21 10:26:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:28,701 INFO L93 Difference]: Finished difference Result 36047 states and 48766 transitions. [2020-09-21 10:26:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:26:28,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 406 [2020-09-21 10:26:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:28,779 INFO L225 Difference]: With dead ends: 36047 [2020-09-21 10:26:28,779 INFO L226 Difference]: Without dead ends: 22065 [2020-09-21 10:26:28,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:26:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22065 states. [2020-09-21 10:26:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22065 to 21286. [2020-09-21 10:26:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21286 states. [2020-09-21 10:26:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21286 states to 21286 states and 27936 transitions. [2020-09-21 10:26:29,397 INFO L78 Accepts]: Start accepts. Automaton has 21286 states and 27936 transitions. Word has length 406 [2020-09-21 10:26:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:29,397 INFO L479 AbstractCegarLoop]: Abstraction has 21286 states and 27936 transitions. [2020-09-21 10:26:29,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 21286 states and 27936 transitions. [2020-09-21 10:26:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-09-21 10:26:29,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:29,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:29,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:26:29,438 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1239620131, now seen corresponding path program 1 times [2020-09-21 10:26:29,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:29,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065273246] [2020-09-21 10:26:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:29,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:29,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-09-21 10:26:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-09-21 10:26:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-09-21 10:26:29,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065273246] [2020-09-21 10:26:29,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:29,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:26:29,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266171920] [2020-09-21 10:26:29,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:26:29,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:29,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:26:29,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:26:29,961 INFO L87 Difference]: Start difference. First operand 21286 states and 27936 transitions. Second operand 5 states. [2020-09-21 10:26:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:32,881 INFO L93 Difference]: Finished difference Result 40840 states and 53823 transitions. [2020-09-21 10:26:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:32,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 416 [2020-09-21 10:26:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:32,883 INFO L225 Difference]: With dead ends: 40840 [2020-09-21 10:26:32,883 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:26:32,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:26:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:26:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:26:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:26:32,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 416 [2020-09-21 10:26:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:32,927 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:26:32,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:26:32,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:26:32,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:26:32,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:26:35,703 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 158 [2020-09-21 10:26:36,427 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 158