/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/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:52:30,416 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-27 21:52:30,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:52:30,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:52:30,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:52:30,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:52:30,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:52:30,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:52:30,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:52:30,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:52:30,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:52:30,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:52:30,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:52:30,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:52:30,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:52:30,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:52:30,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:52:30,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:52:30,550 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 [2020-08-27 21:52:30,587 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:52:30,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:52:30,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:52:30,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:52:30,590 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:52:30,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:52:30,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:52:30,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:52:30,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:52:30,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:52:30,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:52:30,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:52:30,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:52:30,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:52:30,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:52:30,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:52:30,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:52:30,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:52:30,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:52:30,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:52:30,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:52:30,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:52:30,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:52:30,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:52:30,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:52:30,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:52:30,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:52:30,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:52:30,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:52:30,597 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 [2020-08-27 21:52:31,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:52:31,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:52:31,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:52:31,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:52:31,092 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:52:31,093 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-08-27 21:52:31,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a97f566/85d31115ddbf480687f087697e8cf3bb/FLAG8b5e61437 [2020-08-27 21:52:31,870 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:52:31,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-08-27 21:52:31,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a97f566/85d31115ddbf480687f087697e8cf3bb/FLAG8b5e61437 [2020-08-27 21:52:32,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/40a97f566/85d31115ddbf480687f087697e8cf3bb [2020-08-27 21:52:32,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:52:32,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:52:32,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:32,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:52:32,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:52:32,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:32,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4734e8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32, skipping insertion in model container [2020-08-27 21:52:32,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:32,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:52:32,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:52:32,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:32,662 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:52:32,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:52:32,923 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:52:32,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32 WrapperNode [2020-08-27 21:52:32,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:52:32,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:52:32,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:52:32,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:52:32,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:32,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:32,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:32,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:33,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:33,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:33,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (1/1) ... [2020-08-27 21:52:33,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:52:33,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:52:33,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:52:33,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:52:33,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (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 [2020-08-27 21:52:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:52:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:52:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-27 21:52:33,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:52:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-27 21:52:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:52:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:52:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-27 21:52:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:52:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:52:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:52:34,355 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:52:34,355 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-27 21:52:34,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:34 BoogieIcfgContainer [2020-08-27 21:52:34,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:52:34,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:52:34,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:52:34,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:52:34,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:52:32" (1/3) ... [2020-08-27 21:52:34,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6bd996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:34, skipping insertion in model container [2020-08-27 21:52:34,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:52:32" (2/3) ... [2020-08-27 21:52:34,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6bd996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:52:34, skipping insertion in model container [2020-08-27 21:52:34,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:52:34" (3/3) ... [2020-08-27 21:52:34,381 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2020-08-27 21:52:34,393 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:52:34,409 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:52:34,433 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:52:34,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:52:34,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:52:34,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:52:34,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:52:34,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:52:34,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:52:34,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:52:34,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:52:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2020-08-27 21:52:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-27 21:52:34,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:34,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:34,557 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1778503114, now seen corresponding path program 1 times [2020-08-27 21:52:34,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:34,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242390309] [2020-08-27 21:52:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:35,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:35,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242390309] [2020-08-27 21:52:35,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:35,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-27 21:52:35,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812035440] [2020-08-27 21:52:35,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:35,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:35,383 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2020-08-27 21:52:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:37,679 INFO L93 Difference]: Finished difference Result 723 states and 1255 transitions. [2020-08-27 21:52:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:52:37,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-08-27 21:52:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:37,724 INFO L225 Difference]: With dead ends: 723 [2020-08-27 21:52:37,724 INFO L226 Difference]: Without dead ends: 423 [2020-08-27 21:52:37,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-08-27 21:52:37,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2020-08-27 21:52:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-08-27 21:52:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 584 transitions. [2020-08-27 21:52:37,837 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 584 transitions. Word has length 122 [2020-08-27 21:52:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:37,838 INFO L479 AbstractCegarLoop]: Abstraction has 417 states and 584 transitions. [2020-08-27 21:52:37,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 584 transitions. [2020-08-27 21:52:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-27 21:52:37,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:37,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:37,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:52:37,846 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:37,846 INFO L82 PathProgramCache]: Analyzing trace with hash -259733235, now seen corresponding path program 1 times [2020-08-27 21:52:37,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:37,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842133607] [2020-08-27 21:52:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:38,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:38,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:38,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842133607] [2020-08-27 21:52:38,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:52:38,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-27 21:52:38,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582896809] [2020-08-27 21:52:38,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:52:38,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:38,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:52:38,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:52:38,160 INFO L87 Difference]: Start difference. First operand 417 states and 584 transitions. Second operand 8 states. [2020-08-27 21:52:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:39,740 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2020-08-27 21:52:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:52:39,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2020-08-27 21:52:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:39,752 INFO L225 Difference]: With dead ends: 1269 [2020-08-27 21:52:39,752 INFO L226 Difference]: Without dead ends: 858 [2020-08-27 21:52:39,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:52:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2020-08-27 21:52:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 834. [2020-08-27 21:52:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-08-27 21:52:39,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1168 transitions. [2020-08-27 21:52:39,825 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1168 transitions. Word has length 132 [2020-08-27 21:52:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:39,826 INFO L479 AbstractCegarLoop]: Abstraction has 834 states and 1168 transitions. [2020-08-27 21:52:39,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:52:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1168 transitions. [2020-08-27 21:52:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-27 21:52:39,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:39,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:39,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:52:39,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2082377679, now seen corresponding path program 1 times [2020-08-27 21:52:39,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:39,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055598320] [2020-08-27 21:52:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:40,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:40,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:40,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055598320] [2020-08-27 21:52:40,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:40,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:52:40,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912054192] [2020-08-27 21:52:40,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:52:40,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:40,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:52:40,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:40,450 INFO L87 Difference]: Start difference. First operand 834 states and 1168 transitions. Second operand 6 states. [2020-08-27 21:52:41,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:41,835 INFO L93 Difference]: Finished difference Result 1769 states and 2519 transitions. [2020-08-27 21:52:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:52:41,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2020-08-27 21:52:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:41,841 INFO L225 Difference]: With dead ends: 1769 [2020-08-27 21:52:41,842 INFO L226 Difference]: Without dead ends: 840 [2020-08-27 21:52:41,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:52:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-27 21:52:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 832. [2020-08-27 21:52:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2020-08-27 21:52:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1059 transitions. [2020-08-27 21:52:41,880 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1059 transitions. Word has length 133 [2020-08-27 21:52:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:41,881 INFO L479 AbstractCegarLoop]: Abstraction has 832 states and 1059 transitions. [2020-08-27 21:52:41,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:52:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1059 transitions. [2020-08-27 21:52:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-08-27 21:52:41,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:41,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:41,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:52:41,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 394249543, now seen corresponding path program 1 times [2020-08-27 21:52:41,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:41,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156349539] [2020-08-27 21:52:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:42,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:52:42,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156349539] [2020-08-27 21:52:42,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:42,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-27 21:52:42,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287504377] [2020-08-27 21:52:42,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:52:42,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:52:42,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:52:42,114 INFO L87 Difference]: Start difference. First operand 832 states and 1059 transitions. Second operand 5 states. [2020-08-27 21:52:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:43,023 INFO L93 Difference]: Finished difference Result 2079 states and 2683 transitions. [2020-08-27 21:52:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:52:43,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-08-27 21:52:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:43,031 INFO L225 Difference]: With dead ends: 2079 [2020-08-27 21:52:43,031 INFO L226 Difference]: Without dead ends: 1253 [2020-08-27 21:52:43,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:52:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2020-08-27 21:52:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1243. [2020-08-27 21:52:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-08-27 21:52:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1550 transitions. [2020-08-27 21:52:43,089 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1550 transitions. Word has length 137 [2020-08-27 21:52:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:43,090 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1550 transitions. [2020-08-27 21:52:43,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:52:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1550 transitions. [2020-08-27 21:52:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-27 21:52:43,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:43,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:43,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:52:43,099 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash 706222219, now seen corresponding path program 1 times [2020-08-27 21:52:43,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:43,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219935530] [2020-08-27 21:52:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:43,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:43,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:52:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:43,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-27 21:52:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-08-27 21:52:43,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219935530] [2020-08-27 21:52:43,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:43,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:52:43,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44523358] [2020-08-27 21:52:43,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:43,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:43,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:43,426 INFO L87 Difference]: Start difference. First operand 1243 states and 1550 transitions. Second operand 7 states. [2020-08-27 21:52:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:44,716 INFO L93 Difference]: Finished difference Result 3360 states and 4273 transitions. [2020-08-27 21:52:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:52:44,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-08-27 21:52:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:44,735 INFO L225 Difference]: With dead ends: 3360 [2020-08-27 21:52:44,736 INFO L226 Difference]: Without dead ends: 2123 [2020-08-27 21:52:44,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:52:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2020-08-27 21:52:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1962. [2020-08-27 21:52:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1962 states. [2020-08-27 21:52:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2370 transitions. [2020-08-27 21:52:44,815 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2370 transitions. Word has length 181 [2020-08-27 21:52:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:44,816 INFO L479 AbstractCegarLoop]: Abstraction has 1962 states and 2370 transitions. [2020-08-27 21:52:44,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2370 transitions. [2020-08-27 21:52:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-27 21:52:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:44,824 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:44,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:52:44,824 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 853819156, now seen corresponding path program 1 times [2020-08-27 21:52:44,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:44,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954905174] [2020-08-27 21:52:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:44,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-27 21:52:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:45,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-27 21:52:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:45,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-27 21:52:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-27 21:52:45,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954905174] [2020-08-27 21:52:45,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:45,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:52:45,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141879269] [2020-08-27 21:52:45,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:45,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:45,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:45,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:45,101 INFO L87 Difference]: Start difference. First operand 1962 states and 2370 transitions. Second operand 7 states. [2020-08-27 21:52:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:46,641 INFO L93 Difference]: Finished difference Result 5487 states and 6885 transitions. [2020-08-27 21:52:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:52:46,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2020-08-27 21:52:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:46,661 INFO L225 Difference]: With dead ends: 5487 [2020-08-27 21:52:46,661 INFO L226 Difference]: Without dead ends: 3531 [2020-08-27 21:52:46,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:52:46,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2020-08-27 21:52:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3360. [2020-08-27 21:52:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-08-27 21:52:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4099 transitions. [2020-08-27 21:52:46,776 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4099 transitions. Word has length 196 [2020-08-27 21:52:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:46,776 INFO L479 AbstractCegarLoop]: Abstraction has 3360 states and 4099 transitions. [2020-08-27 21:52:46,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4099 transitions. [2020-08-27 21:52:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-27 21:52:46,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:46,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:46,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:52:46,788 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1458466897, now seen corresponding path program 1 times [2020-08-27 21:52:46,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:46,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639974489] [2020-08-27 21:52:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:46,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:46,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:52:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:46,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-27 21:52:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 80 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-27 21:52:47,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639974489] [2020-08-27 21:52:47,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:47,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:52:47,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697635314] [2020-08-27 21:52:47,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:47,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:47,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:47,135 INFO L87 Difference]: Start difference. First operand 3360 states and 4099 transitions. Second operand 7 states. [2020-08-27 21:52:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:48,629 INFO L93 Difference]: Finished difference Result 7002 states and 8519 transitions. [2020-08-27 21:52:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-27 21:52:48,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 195 [2020-08-27 21:52:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:48,660 INFO L225 Difference]: With dead ends: 7002 [2020-08-27 21:52:48,661 INFO L226 Difference]: Without dead ends: 3648 [2020-08-27 21:52:48,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:52:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2020-08-27 21:52:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3646. [2020-08-27 21:52:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3646 states. [2020-08-27 21:52:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 4303 transitions. [2020-08-27 21:52:48,825 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 4303 transitions. Word has length 195 [2020-08-27 21:52:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:48,827 INFO L479 AbstractCegarLoop]: Abstraction has 3646 states and 4303 transitions. [2020-08-27 21:52:48,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 4303 transitions. [2020-08-27 21:52:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-08-27 21:52:48,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:48,848 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:48,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:52:48,848 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash 426210850, now seen corresponding path program 1 times [2020-08-27 21:52:48,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:48,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715200376] [2020-08-27 21:52:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,146 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-08-27 21:52:49,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-27 21:52:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-27 21:52:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-27 21:52:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 122 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-08-27 21:52:49,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715200376] [2020-08-27 21:52:49,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:49,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:52:49,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53049803] [2020-08-27 21:52:49,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:52:49,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:52:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:52:49,355 INFO L87 Difference]: Start difference. First operand 3646 states and 4303 transitions. Second operand 7 states. [2020-08-27 21:52:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:51,168 INFO L93 Difference]: Finished difference Result 7167 states and 8462 transitions. [2020-08-27 21:52:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:52:51,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-08-27 21:52:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:51,187 INFO L225 Difference]: With dead ends: 7167 [2020-08-27 21:52:51,187 INFO L226 Difference]: Without dead ends: 3662 [2020-08-27 21:52:51,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:52:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2020-08-27 21:52:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3656. [2020-08-27 21:52:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3656 states. [2020-08-27 21:52:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 4209 transitions. [2020-08-27 21:52:51,314 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 4209 transitions. Word has length 232 [2020-08-27 21:52:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:51,315 INFO L479 AbstractCegarLoop]: Abstraction has 3656 states and 4209 transitions. [2020-08-27 21:52:51,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:52:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 4209 transitions. [2020-08-27 21:52:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-27 21:52:51,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:51,329 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:51,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:52:51,329 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:51,330 INFO L82 PathProgramCache]: Analyzing trace with hash 604394622, now seen corresponding path program 1 times [2020-08-27 21:52:51,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:51,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276150004] [2020-08-27 21:52:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-27 21:52:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-27 21:52:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-27 21:52:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 147 proven. 39 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-08-27 21:52:51,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276150004] [2020-08-27 21:52:51,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:51,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-27 21:52:51,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704039317] [2020-08-27 21:52:51,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:52:51,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:51,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:52:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:52:51,743 INFO L87 Difference]: Start difference. First operand 3656 states and 4209 transitions. Second operand 9 states. [2020-08-27 21:52:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:52:56,279 INFO L93 Difference]: Finished difference Result 11217 states and 13877 transitions. [2020-08-27 21:52:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-27 21:52:56,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-08-27 21:52:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:52:56,319 INFO L225 Difference]: With dead ends: 11217 [2020-08-27 21:52:56,319 INFO L226 Difference]: Without dead ends: 7702 [2020-08-27 21:52:56,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-08-27 21:52:56,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2020-08-27 21:52:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 7406. [2020-08-27 21:52:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7406 states. [2020-08-27 21:52:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7406 states to 7406 states and 9126 transitions. [2020-08-27 21:52:56,580 INFO L78 Accepts]: Start accepts. Automaton has 7406 states and 9126 transitions. Word has length 246 [2020-08-27 21:52:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:52:56,581 INFO L479 AbstractCegarLoop]: Abstraction has 7406 states and 9126 transitions. [2020-08-27 21:52:56,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:52:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7406 states and 9126 transitions. [2020-08-27 21:52:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-27 21:52:56,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:52:56,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:52:56,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:52:56,617 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:52:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:52:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash -763457286, now seen corresponding path program 1 times [2020-08-27 21:52:56,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:52:56,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985992] [2020-08-27 21:52:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:52:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:52:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:56,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:52:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:52:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:56,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:52:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:57,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-27 21:52:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:52:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 171 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-27 21:52:57,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985992] [2020-08-27 21:52:57,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:52:57,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:52:57,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451962737] [2020-08-27 21:52:57,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:52:57,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:52:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:52:57,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:52:57,101 INFO L87 Difference]: Start difference. First operand 7406 states and 9126 transitions. Second operand 10 states. [2020-08-27 21:52:57,899 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-08-27 21:53:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:00,300 INFO L93 Difference]: Finished difference Result 14172 states and 17050 transitions. [2020-08-27 21:53:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:53:00,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 276 [2020-08-27 21:53:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:00,329 INFO L225 Difference]: With dead ends: 14172 [2020-08-27 21:53:00,330 INFO L226 Difference]: Without dead ends: 6907 [2020-08-27 21:53:00,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-08-27 21:53:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6907 states. [2020-08-27 21:53:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6907 to 6883. [2020-08-27 21:53:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6883 states. [2020-08-27 21:53:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6883 states to 6883 states and 7945 transitions. [2020-08-27 21:53:00,510 INFO L78 Accepts]: Start accepts. Automaton has 6883 states and 7945 transitions. Word has length 276 [2020-08-27 21:53:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:00,510 INFO L479 AbstractCegarLoop]: Abstraction has 6883 states and 7945 transitions. [2020-08-27 21:53:00,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:53:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6883 states and 7945 transitions. [2020-08-27 21:53:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-08-27 21:53:00,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:00,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:00,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:53:00,531 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2075847519, now seen corresponding path program 1 times [2020-08-27 21:53:00,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:00,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178157741] [2020-08-27 21:53:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:00,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-27 21:53:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 225 proven. 31 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-08-27 21:53:01,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178157741] [2020-08-27 21:53:01,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:01,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-27 21:53:01,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610351585] [2020-08-27 21:53:01,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:53:01,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:53:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:53:01,094 INFO L87 Difference]: Start difference. First operand 6883 states and 7945 transitions. Second operand 9 states. [2020-08-27 21:53:02,960 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-08-27 21:53:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:03,424 INFO L93 Difference]: Finished difference Result 13655 states and 15775 transitions. [2020-08-27 21:53:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-27 21:53:03,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 289 [2020-08-27 21:53:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:03,447 INFO L225 Difference]: With dead ends: 13655 [2020-08-27 21:53:03,447 INFO L226 Difference]: Without dead ends: 6913 [2020-08-27 21:53:03,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:53:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2020-08-27 21:53:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6885. [2020-08-27 21:53:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6885 states. [2020-08-27 21:53:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 7926 transitions. [2020-08-27 21:53:03,594 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 7926 transitions. Word has length 289 [2020-08-27 21:53:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:03,594 INFO L479 AbstractCegarLoop]: Abstraction has 6885 states and 7926 transitions. [2020-08-27 21:53:03,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:53:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 7926 transitions. [2020-08-27 21:53:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-08-27 21:53:03,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:03,611 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:03,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-27 21:53:03,611 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -394947665, now seen corresponding path program 1 times [2020-08-27 21:53:03,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:03,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560810252] [2020-08-27 21:53:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:03,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-27 21:53:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-27 21:53:04,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560810252] [2020-08-27 21:53:04,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:04,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:53:04,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254970203] [2020-08-27 21:53:04,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:53:04,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:53:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:53:04,029 INFO L87 Difference]: Start difference. First operand 6885 states and 7926 transitions. Second operand 8 states. [2020-08-27 21:53:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:05,490 INFO L93 Difference]: Finished difference Result 13538 states and 15450 transitions. [2020-08-27 21:53:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:53:05,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 308 [2020-08-27 21:53:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:05,523 INFO L225 Difference]: With dead ends: 13538 [2020-08-27 21:53:05,523 INFO L226 Difference]: Without dead ends: 6796 [2020-08-27 21:53:05,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:53:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2020-08-27 21:53:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 6053. [2020-08-27 21:53:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6053 states. [2020-08-27 21:53:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6053 states to 6053 states and 6739 transitions. [2020-08-27 21:53:05,734 INFO L78 Accepts]: Start accepts. Automaton has 6053 states and 6739 transitions. Word has length 308 [2020-08-27 21:53:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:05,734 INFO L479 AbstractCegarLoop]: Abstraction has 6053 states and 6739 transitions. [2020-08-27 21:53:05,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:53:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6053 states and 6739 transitions. [2020-08-27 21:53:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-08-27 21:53:05,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:05,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:05,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-27 21:53:05,760 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:05,762 INFO L82 PathProgramCache]: Analyzing trace with hash 874817583, now seen corresponding path program 1 times [2020-08-27 21:53:05,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:05,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706552376] [2020-08-27 21:53:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:05,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-27 21:53:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 198 proven. 5 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-08-27 21:53:06,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706552376] [2020-08-27 21:53:06,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:06,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-27 21:53:06,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219118347] [2020-08-27 21:53:06,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:53:06,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:53:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:53:06,236 INFO L87 Difference]: Start difference. First operand 6053 states and 6739 transitions. Second operand 5 states. [2020-08-27 21:53:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:07,316 INFO L93 Difference]: Finished difference Result 12515 states and 13928 transitions. [2020-08-27 21:53:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:53:07,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 313 [2020-08-27 21:53:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:07,334 INFO L225 Difference]: With dead ends: 12515 [2020-08-27 21:53:07,334 INFO L226 Difference]: Without dead ends: 5497 [2020-08-27 21:53:07,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:53:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2020-08-27 21:53:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 5344. [2020-08-27 21:53:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2020-08-27 21:53:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5826 transitions. [2020-08-27 21:53:07,443 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5826 transitions. Word has length 313 [2020-08-27 21:53:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:07,444 INFO L479 AbstractCegarLoop]: Abstraction has 5344 states and 5826 transitions. [2020-08-27 21:53:07,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:53:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5826 transitions. [2020-08-27 21:53:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-08-27 21:53:07,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:07,459 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:07,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-27 21:53:07,459 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1264462194, now seen corresponding path program 1 times [2020-08-27 21:53:07,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:07,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481076526] [2020-08-27 21:53:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-27 21:53:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:07,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-27 21:53:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 184 proven. 21 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-08-27 21:53:08,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481076526] [2020-08-27 21:53:08,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:08,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:53:08,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643550931] [2020-08-27 21:53:08,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:53:08,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:53:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:53:08,022 INFO L87 Difference]: Start difference. First operand 5344 states and 5826 transitions. Second operand 6 states. [2020-08-27 21:53:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:09,318 INFO L93 Difference]: Finished difference Result 5904 states and 6477 transitions. [2020-08-27 21:53:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:53:09,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 318 [2020-08-27 21:53:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:09,345 INFO L225 Difference]: With dead ends: 5904 [2020-08-27 21:53:09,345 INFO L226 Difference]: Without dead ends: 5902 [2020-08-27 21:53:09,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:53:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5902 states. [2020-08-27 21:53:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5902 to 5479. [2020-08-27 21:53:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5479 states. [2020-08-27 21:53:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 5996 transitions. [2020-08-27 21:53:09,465 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 5996 transitions. Word has length 318 [2020-08-27 21:53:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:09,466 INFO L479 AbstractCegarLoop]: Abstraction has 5479 states and 5996 transitions. [2020-08-27 21:53:09,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:53:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 5996 transitions. [2020-08-27 21:53:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-08-27 21:53:09,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:09,487 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:09,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-27 21:53:09,488 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 41074506, now seen corresponding path program 1 times [2020-08-27 21:53:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:09,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204164143] [2020-08-27 21:53:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-27 21:53:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:09,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-27 21:53:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 357 proven. 25 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-08-27 21:53:10,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204164143] [2020-08-27 21:53:10,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:10,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-27 21:53:10,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597390292] [2020-08-27 21:53:10,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-27 21:53:10,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-27 21:53:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:53:10,170 INFO L87 Difference]: Start difference. First operand 5479 states and 5996 transitions. Second operand 12 states. [2020-08-27 21:53:10,613 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2020-08-27 21:53:11,236 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-08-27 21:53:12,694 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-08-27 21:53:13,354 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-08-27 21:53:14,284 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-08-27 21:53:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:14,948 INFO L93 Difference]: Finished difference Result 10259 states and 11214 transitions. [2020-08-27 21:53:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-27 21:53:14,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 338 [2020-08-27 21:53:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:14,962 INFO L225 Difference]: With dead ends: 10259 [2020-08-27 21:53:14,962 INFO L226 Difference]: Without dead ends: 4923 [2020-08-27 21:53:14,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2020-08-27 21:53:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2020-08-27 21:53:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 4905. [2020-08-27 21:53:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4905 states. [2020-08-27 21:53:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 5319 transitions. [2020-08-27 21:53:15,054 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 5319 transitions. Word has length 338 [2020-08-27 21:53:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:15,055 INFO L479 AbstractCegarLoop]: Abstraction has 4905 states and 5319 transitions. [2020-08-27 21:53:15,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-27 21:53:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 5319 transitions. [2020-08-27 21:53:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-08-27 21:53:15,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:53:15,071 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:53:15,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-27 21:53:15,072 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:53:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:53:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1269018866, now seen corresponding path program 1 times [2020-08-27 21:53:15,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:53:15,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036154718] [2020-08-27 21:53:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:53:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:53:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-27 21:53:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-27 21:53:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-27 21:53:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-27 21:53:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-27 21:53:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-27 21:53:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:53:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 224 proven. 24 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2020-08-27 21:53:15,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036154718] [2020-08-27 21:53:15,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:53:15,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:53:15,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640925104] [2020-08-27 21:53:15,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:53:15,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:53:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:53:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:53:15,643 INFO L87 Difference]: Start difference. First operand 4905 states and 5319 transitions. Second operand 7 states. [2020-08-27 21:53:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:53:17,049 INFO L93 Difference]: Finished difference Result 8974 states and 9763 transitions. [2020-08-27 21:53:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:53:17,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 358 [2020-08-27 21:53:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:53:17,052 INFO L225 Difference]: With dead ends: 8974 [2020-08-27 21:53:17,052 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:53:17,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:53:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:53:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:53:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:53:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:53:17,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 358 [2020-08-27 21:53:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:53:17,074 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:53:17,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:53:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:53:17,074 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:53:17,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-27 21:53:17,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:53:17,362 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-08-27 21:53:18,084 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-08-27 21:53:20,216 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 215 [2020-08-27 21:53:21,105 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 215 [2020-08-27 21:53:21,280 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40