/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:57:52,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:57:52,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:57:52,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 22:57:52,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:57:52,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:57:52,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:57:52,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:57:52,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:57:52,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:57:52,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:57:52,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:57:52,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:57:52,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:57:52,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:57:52,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:57:52,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 22:57:52,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:57:52,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:57:52,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:57:52,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:57:52,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:57:52,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:57:52,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:57:52,796 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:57:52,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:57:52,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:57:52,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:57:52,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:57:52,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:57:52,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:57:52,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:57:52,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:57:52,799 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:57:52,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:57:52,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:57:52,800 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:57:52,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:57:52,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:57:52,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:57:52,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:57:52,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:57:52,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:57:52,801 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 22:57:53,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:57:53,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:57:53,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:57:53,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:57:53,248 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:57:53,249 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-04 22:57:53,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8195f72c9/69d37144f585481dbd3f00965d6d5f8d/FLAG4c96b1a48 [2020-09-04 22:57:54,026 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:57:54,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2020-09-04 22:57:54,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8195f72c9/69d37144f585481dbd3f00965d6d5f8d/FLAG4c96b1a48 [2020-09-04 22:57:54,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8195f72c9/69d37144f585481dbd3f00965d6d5f8d [2020-09-04 22:57:54,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:57:54,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:57:54,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:57:54,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:57:54,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:57:54,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:57:54" (1/1) ... [2020-09-04 22:57:54,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d21840e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:54, skipping insertion in model container [2020-09-04 22:57:54,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:57:54" (1/1) ... [2020-09-04 22:57:54,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:57:54,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:57:55,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:57:55,089 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:57:55,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:57:55,357 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:57:55,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55 WrapperNode [2020-09-04 22:57:55,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:57:55,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:57:55,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:57:55,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:57:55,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... [2020-09-04 22:57:55,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:57:55,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:57:55,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:57:55,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:57:55,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:57:55,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:57:55,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:57:55,646 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-04 22:57:55,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-04 22:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:57:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:57:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:57:58,204 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:57:58,204 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 22:57:58,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:57:58 BoogieIcfgContainer [2020-09-04 22:57:58,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:57:58,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:57:58,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:57:58,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:57:58,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:57:54" (1/3) ... [2020-09-04 22:57:58,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1116ba40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:57:58, skipping insertion in model container [2020-09-04 22:57:58,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:57:55" (2/3) ... [2020-09-04 22:57:58,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1116ba40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:57:58, skipping insertion in model container [2020-09-04 22:57:58,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:57:58" (3/3) ... [2020-09-04 22:57:58,241 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2020-09-04 22:57:58,250 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:57:58,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:57:58,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:57:58,313 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:57:58,313 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:57:58,314 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:57:58,314 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:57:58,314 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:57:58,314 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:57:58,314 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:57:58,314 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:57:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-04 22:57:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 22:57:58,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:57:58,363 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] [2020-09-04 22:57:58,363 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:57:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:57:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash -123889732, now seen corresponding path program 1 times [2020-09-04 22:57:58,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:57:58,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927855178] [2020-09-04 22:57:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:57:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:57:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:57:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:57:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:57:58,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927855178] [2020-09-04 22:57:58,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:57:58,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 22:57:58,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238635962] [2020-09-04 22:57:58,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 22:57:58,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:57:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 22:57:58,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 22:57:58,894 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-04 22:58:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:05,237 INFO L93 Difference]: Finished difference Result 2361 states and 3156 transitions. [2020-09-04 22:58:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:58:05,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-09-04 22:58:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:05,285 INFO L225 Difference]: With dead ends: 2361 [2020-09-04 22:58:05,286 INFO L226 Difference]: Without dead ends: 1487 [2020-09-04 22:58:05,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:58:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-09-04 22:58:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1155. [2020-09-04 22:58:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2020-09-04 22:58:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1484 transitions. [2020-09-04 22:58:05,566 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1484 transitions. Word has length 55 [2020-09-04 22:58:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:05,568 INFO L479 AbstractCegarLoop]: Abstraction has 1155 states and 1484 transitions. [2020-09-04 22:58:05,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 22:58:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1484 transitions. [2020-09-04 22:58:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 22:58:05,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:05,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-04 22:58:05,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:58:05,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 736411249, now seen corresponding path program 1 times [2020-09-04 22:58:05,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:05,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767360354] [2020-09-04 22:58:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:05,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:58:06,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767360354] [2020-09-04 22:58:06,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:58:06,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:58:06,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790309504] [2020-09-04 22:58:06,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:58:06,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:58:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:58:06,033 INFO L87 Difference]: Start difference. First operand 1155 states and 1484 transitions. Second operand 7 states. [2020-09-04 22:58:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:11,808 INFO L93 Difference]: Finished difference Result 3082 states and 4163 transitions. [2020-09-04 22:58:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 22:58:11,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-09-04 22:58:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:11,831 INFO L225 Difference]: With dead ends: 3082 [2020-09-04 22:58:11,831 INFO L226 Difference]: Without dead ends: 1944 [2020-09-04 22:58:11,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:58:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2020-09-04 22:58:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1847. [2020-09-04 22:58:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1847 states. [2020-09-04 22:58:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2324 transitions. [2020-09-04 22:58:12,021 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2324 transitions. Word has length 136 [2020-09-04 22:58:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:12,023 INFO L479 AbstractCegarLoop]: Abstraction has 1847 states and 2324 transitions. [2020-09-04 22:58:12,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:58:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2324 transitions. [2020-09-04 22:58:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-04 22:58:12,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:12,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-04 22:58:12,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:58:12,040 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1086264008, now seen corresponding path program 1 times [2020-09-04 22:58:12,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:12,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694234302] [2020-09-04 22:58:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:12,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:12,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:58:12,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694234302] [2020-09-04 22:58:12,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:58:12,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:58:12,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527349562] [2020-09-04 22:58:12,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:58:12,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:58:12,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:58:12,413 INFO L87 Difference]: Start difference. First operand 1847 states and 2324 transitions. Second operand 7 states. [2020-09-04 22:58:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:18,095 INFO L93 Difference]: Finished difference Result 4824 states and 6321 transitions. [2020-09-04 22:58:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 22:58:18,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-09-04 22:58:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:18,120 INFO L225 Difference]: With dead ends: 4824 [2020-09-04 22:58:18,120 INFO L226 Difference]: Without dead ends: 2994 [2020-09-04 22:58:18,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:58:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2020-09-04 22:58:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2913. [2020-09-04 22:58:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2913 states. [2020-09-04 22:58:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3624 transitions. [2020-09-04 22:58:18,382 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3624 transitions. Word has length 144 [2020-09-04 22:58:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:18,382 INFO L479 AbstractCegarLoop]: Abstraction has 2913 states and 3624 transitions. [2020-09-04 22:58:18,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:58:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3624 transitions. [2020-09-04 22:58:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-09-04 22:58:18,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:18,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:58:18,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:58:18,389 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1034486148, now seen corresponding path program 1 times [2020-09-04 22:58:18,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:18,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024133310] [2020-09-04 22:58:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:18,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:18,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:18,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-04 22:58:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 74 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 22:58:18,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024133310] [2020-09-04 22:58:18,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:58:18,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 22:58:18,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641673015] [2020-09-04 22:58:18,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:58:18,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:58:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:58:18,796 INFO L87 Difference]: Start difference. First operand 2913 states and 3624 transitions. Second operand 8 states. [2020-09-04 22:58:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:24,428 INFO L93 Difference]: Finished difference Result 5476 states and 6930 transitions. [2020-09-04 22:58:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 22:58:24,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 220 [2020-09-04 22:58:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:24,453 INFO L225 Difference]: With dead ends: 5476 [2020-09-04 22:58:24,454 INFO L226 Difference]: Without dead ends: 2974 [2020-09-04 22:58:24,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:58:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2020-09-04 22:58:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2917. [2020-09-04 22:58:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-09-04 22:58:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 3623 transitions. [2020-09-04 22:58:24,717 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 3623 transitions. Word has length 220 [2020-09-04 22:58:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:24,717 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 3623 transitions. [2020-09-04 22:58:24,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:58:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 3623 transitions. [2020-09-04 22:58:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-04 22:58:24,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:24,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:58:24,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:58:24,724 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:24,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1151458182, now seen corresponding path program 1 times [2020-09-04 22:58:24,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:24,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966173371] [2020-09-04 22:58:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:24,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:24,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:25,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 22:58:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 116 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 22:58:25,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966173371] [2020-09-04 22:58:25,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:58:25,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 22:58:25,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134724604] [2020-09-04 22:58:25,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:58:25,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:58:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:58:25,255 INFO L87 Difference]: Start difference. First operand 2917 states and 3623 transitions. Second operand 6 states. [2020-09-04 22:58:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:29,795 INFO L93 Difference]: Finished difference Result 7172 states and 9353 transitions. [2020-09-04 22:58:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:58:29,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 269 [2020-09-04 22:58:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:29,842 INFO L225 Difference]: With dead ends: 7172 [2020-09-04 22:58:29,842 INFO L226 Difference]: Without dead ends: 4666 [2020-09-04 22:58:29,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:58:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-09-04 22:58:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4601. [2020-09-04 22:58:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4601 states. [2020-09-04 22:58:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5915 transitions. [2020-09-04 22:58:30,306 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5915 transitions. Word has length 269 [2020-09-04 22:58:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:30,307 INFO L479 AbstractCegarLoop]: Abstraction has 4601 states and 5915 transitions. [2020-09-04 22:58:30,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:58:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5915 transitions. [2020-09-04 22:58:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-04 22:58:30,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:30,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:58:30,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:58:30,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429082, now seen corresponding path program 1 times [2020-09-04 22:58:30,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:30,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217464758] [2020-09-04 22:58:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:30,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:30,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:30,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 22:58:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-09-04 22:58:30,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217464758] [2020-09-04 22:58:30,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:58:30,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 22:58:30,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589980913] [2020-09-04 22:58:30,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 22:58:30,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 22:58:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 22:58:30,765 INFO L87 Difference]: Start difference. First operand 4601 states and 5915 transitions. Second operand 5 states. [2020-09-04 22:58:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:35,807 INFO L93 Difference]: Finished difference Result 9909 states and 13093 transitions. [2020-09-04 22:58:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 22:58:35,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2020-09-04 22:58:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:35,853 INFO L225 Difference]: With dead ends: 9909 [2020-09-04 22:58:35,853 INFO L226 Difference]: Without dead ends: 5719 [2020-09-04 22:58:35,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:58:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2020-09-04 22:58:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 5662. [2020-09-04 22:58:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5662 states. [2020-09-04 22:58:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 7396 transitions. [2020-09-04 22:58:36,498 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 7396 transitions. Word has length 277 [2020-09-04 22:58:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:36,499 INFO L479 AbstractCegarLoop]: Abstraction has 5662 states and 7396 transitions. [2020-09-04 22:58:36,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 22:58:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 7396 transitions. [2020-09-04 22:58:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-09-04 22:58:36,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:36,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:58:36,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:58:36,508 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:36,508 INFO L82 PathProgramCache]: Analyzing trace with hash -93697981, now seen corresponding path program 1 times [2020-09-04 22:58:36,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:36,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593339720] [2020-09-04 22:58:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:36,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:36,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:36,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 22:58:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-04 22:58:37,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593339720] [2020-09-04 22:58:37,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:58:37,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 22:58:37,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752686634] [2020-09-04 22:58:37,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:58:37,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:37,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:58:37,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:58:37,089 INFO L87 Difference]: Start difference. First operand 5662 states and 7396 transitions. Second operand 9 states. [2020-09-04 22:58:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:58:45,930 INFO L93 Difference]: Finished difference Result 14775 states and 20627 transitions. [2020-09-04 22:58:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 22:58:45,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 279 [2020-09-04 22:58:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:58:45,996 INFO L225 Difference]: With dead ends: 14775 [2020-09-04 22:58:45,997 INFO L226 Difference]: Without dead ends: 9524 [2020-09-04 22:58:46,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:58:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2020-09-04 22:58:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 9230. [2020-09-04 22:58:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9230 states. [2020-09-04 22:58:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9230 states to 9230 states and 12961 transitions. [2020-09-04 22:58:47,528 INFO L78 Accepts]: Start accepts. Automaton has 9230 states and 12961 transitions. Word has length 279 [2020-09-04 22:58:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:58:47,529 INFO L479 AbstractCegarLoop]: Abstraction has 9230 states and 12961 transitions. [2020-09-04 22:58:47,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:58:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 9230 states and 12961 transitions. [2020-09-04 22:58:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-04 22:58:47,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:58:47,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:58:47,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:58:47,538 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:58:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:58:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1780607293, now seen corresponding path program 1 times [2020-09-04 22:58:47,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:58:47,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103809574] [2020-09-04 22:58:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:58:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:47,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:58:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:58:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:47,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 22:58:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:58:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 150 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 22:58:47,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103809574] [2020-09-04 22:58:47,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:58:47,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 22:58:47,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856756027] [2020-09-04 22:58:47,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 22:58:47,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:58:47,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 22:58:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 22:58:47,918 INFO L87 Difference]: Start difference. First operand 9230 states and 12961 transitions. Second operand 9 states. [2020-09-04 22:59:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:00,047 INFO L93 Difference]: Finished difference Result 29358 states and 43858 transitions. [2020-09-04 22:59:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 22:59:00,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 285 [2020-09-04 22:59:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:59:00,219 INFO L225 Difference]: With dead ends: 29358 [2020-09-04 22:59:00,219 INFO L226 Difference]: Without dead ends: 20539 [2020-09-04 22:59:00,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:59:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2020-09-04 22:59:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20239. [2020-09-04 22:59:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20239 states. [2020-09-04 22:59:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20239 states to 20239 states and 28166 transitions. [2020-09-04 22:59:02,141 INFO L78 Accepts]: Start accepts. Automaton has 20239 states and 28166 transitions. Word has length 285 [2020-09-04 22:59:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:59:02,142 INFO L479 AbstractCegarLoop]: Abstraction has 20239 states and 28166 transitions. [2020-09-04 22:59:02,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 22:59:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 20239 states and 28166 transitions. [2020-09-04 22:59:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 22:59:02,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:59:02,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:59:02,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:59:02,155 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:59:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:59:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1312144757, now seen corresponding path program 1 times [2020-09-04 22:59:02,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:59:02,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303407541] [2020-09-04 22:59:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:59:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:59:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:02,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:59:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:02,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 22:59:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-04 22:59:02,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303407541] [2020-09-04 22:59:02,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:59:02,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 22:59:02,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262131674] [2020-09-04 22:59:02,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 22:59:02,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:59:02,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 22:59:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 22:59:02,503 INFO L87 Difference]: Start difference. First operand 20239 states and 28166 transitions. Second operand 5 states. [2020-09-04 22:59:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:08,412 INFO L93 Difference]: Finished difference Result 45946 states and 64801 transitions. [2020-09-04 22:59:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 22:59:08,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-09-04 22:59:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:59:08,562 INFO L225 Difference]: With dead ends: 45946 [2020-09-04 22:59:08,562 INFO L226 Difference]: Without dead ends: 26118 [2020-09-04 22:59:08,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:59:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26118 states. [2020-09-04 22:59:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26118 to 25249. [2020-09-04 22:59:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25249 states. [2020-09-04 22:59:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25249 states to 25249 states and 35010 transitions. [2020-09-04 22:59:11,932 INFO L78 Accepts]: Start accepts. Automaton has 25249 states and 35010 transitions. Word has length 301 [2020-09-04 22:59:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:59:11,933 INFO L479 AbstractCegarLoop]: Abstraction has 25249 states and 35010 transitions. [2020-09-04 22:59:11,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 22:59:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25249 states and 35010 transitions. [2020-09-04 22:59:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-09-04 22:59:11,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:59:11,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:59:11,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:59:11,946 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:59:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:59:11,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1665784485, now seen corresponding path program 1 times [2020-09-04 22:59:11,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:59:11,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978730806] [2020-09-04 22:59:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:59:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:12,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:59:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:59:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:12,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 22:59:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 22:59:12,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978730806] [2020-09-04 22:59:12,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:59:12,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 22:59:12,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885956607] [2020-09-04 22:59:12,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:59:12,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:59:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:59:12,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:59:12,350 INFO L87 Difference]: Start difference. First operand 25249 states and 35010 transitions. Second operand 7 states. [2020-09-04 22:59:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:19,440 INFO L93 Difference]: Finished difference Result 54246 states and 75727 transitions. [2020-09-04 22:59:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 22:59:19,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 312 [2020-09-04 22:59:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:59:19,587 INFO L225 Difference]: With dead ends: 54246 [2020-09-04 22:59:19,587 INFO L226 Difference]: Without dead ends: 29408 [2020-09-04 22:59:19,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:59:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29408 states. [2020-09-04 22:59:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29408 to 29104. [2020-09-04 22:59:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29104 states. [2020-09-04 22:59:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29104 states to 29104 states and 39294 transitions. [2020-09-04 22:59:21,987 INFO L78 Accepts]: Start accepts. Automaton has 29104 states and 39294 transitions. Word has length 312 [2020-09-04 22:59:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:59:21,987 INFO L479 AbstractCegarLoop]: Abstraction has 29104 states and 39294 transitions. [2020-09-04 22:59:21,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:59:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29104 states and 39294 transitions. [2020-09-04 22:59:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-04 22:59:21,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:59:22,000 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:59:22,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:59:22,000 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:59:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:59:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash 33622082, now seen corresponding path program 1 times [2020-09-04 22:59:22,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:59:22,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790611976] [2020-09-04 22:59:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:59:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:59:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:22,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:59:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:22,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-04 22:59:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 22:59:22,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790611976] [2020-09-04 22:59:22,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:59:22,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 22:59:22,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457776690] [2020-09-04 22:59:22,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:59:22,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:59:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:59:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:59:22,369 INFO L87 Difference]: Start difference. First operand 29104 states and 39294 transitions. Second operand 6 states. [2020-09-04 22:59:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:32,884 INFO L93 Difference]: Finished difference Result 65475 states and 89426 transitions. [2020-09-04 22:59:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:59:32,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 338 [2020-09-04 22:59:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:59:33,053 INFO L225 Difference]: With dead ends: 65475 [2020-09-04 22:59:33,054 INFO L226 Difference]: Without dead ends: 36782 [2020-09-04 22:59:33,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:59:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36782 states. [2020-09-04 22:59:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36782 to 35711. [2020-09-04 22:59:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35711 states. [2020-09-04 22:59:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35711 states to 35711 states and 48074 transitions. [2020-09-04 22:59:35,737 INFO L78 Accepts]: Start accepts. Automaton has 35711 states and 48074 transitions. Word has length 338 [2020-09-04 22:59:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:59:35,737 INFO L479 AbstractCegarLoop]: Abstraction has 35711 states and 48074 transitions. [2020-09-04 22:59:35,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:59:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35711 states and 48074 transitions. [2020-09-04 22:59:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-09-04 22:59:35,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:59:35,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:59:35,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:59:35,760 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:59:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:59:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash -32484685, now seen corresponding path program 1 times [2020-09-04 22:59:35,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:59:35,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432482146] [2020-09-04 22:59:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:59:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:59:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:35,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:59:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:36,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 22:59:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:36,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-04 22:59:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 303 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-04 22:59:36,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432482146] [2020-09-04 22:59:36,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:59:36,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 22:59:36,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054923931] [2020-09-04 22:59:36,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:59:36,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:59:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:59:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:59:36,261 INFO L87 Difference]: Start difference. First operand 35711 states and 48074 transitions. Second operand 7 states. [2020-09-04 22:59:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:43,743 INFO L93 Difference]: Finished difference Result 63740 states and 87072 transitions. [2020-09-04 22:59:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 22:59:43,744 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 397 [2020-09-04 22:59:43,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:59:43,920 INFO L225 Difference]: With dead ends: 63740 [2020-09-04 22:59:43,920 INFO L226 Difference]: Without dead ends: 28440 [2020-09-04 22:59:44,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:59:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28440 states. [2020-09-04 22:59:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28440 to 27787. [2020-09-04 22:59:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27787 states. [2020-09-04 22:59:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27787 states to 27787 states and 35028 transitions. [2020-09-04 22:59:46,195 INFO L78 Accepts]: Start accepts. Automaton has 27787 states and 35028 transitions. Word has length 397 [2020-09-04 22:59:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:59:46,196 INFO L479 AbstractCegarLoop]: Abstraction has 27787 states and 35028 transitions. [2020-09-04 22:59:46,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:59:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 27787 states and 35028 transitions. [2020-09-04 22:59:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2020-09-04 22:59:46,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:59:46,240 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-04 22:59:46,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:59:46,240 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:59:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:59:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -745953394, now seen corresponding path program 1 times [2020-09-04 22:59:46,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:59:46,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644215237] [2020-09-04 22:59:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:59:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:46,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:59:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 22:59:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:46,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 22:59:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:46,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-09-04 22:59:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:46,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-09-04 22:59:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:59:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 377 proven. 189 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-09-04 22:59:47,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644215237] [2020-09-04 22:59:47,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:59:47,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 22:59:47,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591945708] [2020-09-04 22:59:47,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 22:59:47,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:59:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 22:59:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 22:59:47,160 INFO L87 Difference]: Start difference. First operand 27787 states and 35028 transitions. Second operand 10 states. [2020-09-04 22:59:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:59:59,978 INFO L93 Difference]: Finished difference Result 60342 states and 76042 transitions. [2020-09-04 22:59:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 22:59:59,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 520 [2020-09-04 22:59:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:00:00,141 INFO L225 Difference]: With dead ends: 60342 [2020-09-04 23:00:00,142 INFO L226 Difference]: Without dead ends: 32966 [2020-09-04 23:00:00,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:00:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32966 states. [2020-09-04 23:00:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32966 to 32823. [2020-09-04 23:00:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32823 states. [2020-09-04 23:00:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32823 states to 32823 states and 40852 transitions. [2020-09-04 23:00:02,721 INFO L78 Accepts]: Start accepts. Automaton has 32823 states and 40852 transitions. Word has length 520 [2020-09-04 23:00:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:00:02,722 INFO L479 AbstractCegarLoop]: Abstraction has 32823 states and 40852 transitions. [2020-09-04 23:00:02,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:00:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32823 states and 40852 transitions. [2020-09-04 23:00:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-09-04 23:00:02,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:00:02,759 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 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, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:00:02,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:00:02,760 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:00:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:00:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1473222243, now seen corresponding path program 1 times [2020-09-04 23:00:02,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:00:02,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320371105] [2020-09-04 23:00:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:00:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:02,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:00:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:02,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:00:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:03,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:00:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:03,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-09-04 23:00:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-09-04 23:00:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 178 proven. 389 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-09-04 23:00:03,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320371105] [2020-09-04 23:00:03,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:00:03,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:00:03,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239467680] [2020-09-04 23:00:03,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:00:03,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:00:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:00:03,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:00:03,615 INFO L87 Difference]: Start difference. First operand 32823 states and 40852 transitions. Second operand 9 states. [2020-09-04 23:00:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:00:16,717 INFO L93 Difference]: Finished difference Result 67653 states and 84287 transitions. [2020-09-04 23:00:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:00:16,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 534 [2020-09-04 23:00:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:00:16,875 INFO L225 Difference]: With dead ends: 67653 [2020-09-04 23:00:16,876 INFO L226 Difference]: Without dead ends: 35241 [2020-09-04 23:00:16,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:00:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35241 states. [2020-09-04 23:00:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35241 to 34896. [2020-09-04 23:00:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34896 states. [2020-09-04 23:00:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34896 states to 34896 states and 43196 transitions. [2020-09-04 23:00:20,654 INFO L78 Accepts]: Start accepts. Automaton has 34896 states and 43196 transitions. Word has length 534 [2020-09-04 23:00:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:00:20,654 INFO L479 AbstractCegarLoop]: Abstraction has 34896 states and 43196 transitions. [2020-09-04 23:00:20,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:00:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34896 states and 43196 transitions. [2020-09-04 23:00:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-09-04 23:00:20,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:00:20,705 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 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, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:00:20,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:00:20,705 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:00:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:00:20,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1332091315, now seen corresponding path program 1 times [2020-09-04 23:00:20,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:00:20,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530458835] [2020-09-04 23:00:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:00:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:20,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:00:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:20,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:00:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:00:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:21,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:00:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:21,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 401 [2020-09-04 23:00:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 191 proven. 301 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2020-09-04 23:00:21,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530458835] [2020-09-04 23:00:21,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:00:21,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:00:21,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715451568] [2020-09-04 23:00:21,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:00:21,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:00:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:00:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:00:21,796 INFO L87 Difference]: Start difference. First operand 34896 states and 43196 transitions. Second operand 9 states. [2020-09-04 23:00:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:00:39,513 INFO L93 Difference]: Finished difference Result 87764 states and 109118 transitions. [2020-09-04 23:00:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:00:39,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 549 [2020-09-04 23:00:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:00:39,701 INFO L225 Difference]: With dead ends: 87764 [2020-09-04 23:00:39,701 INFO L226 Difference]: Without dead ends: 53279 [2020-09-04 23:00:39,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:00:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53279 states. [2020-09-04 23:00:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53279 to 52885. [2020-09-04 23:00:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52885 states. [2020-09-04 23:00:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52885 states to 52885 states and 65173 transitions. [2020-09-04 23:00:44,263 INFO L78 Accepts]: Start accepts. Automaton has 52885 states and 65173 transitions. Word has length 549 [2020-09-04 23:00:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:00:44,264 INFO L479 AbstractCegarLoop]: Abstraction has 52885 states and 65173 transitions. [2020-09-04 23:00:44,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:00:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 52885 states and 65173 transitions. [2020-09-04 23:00:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2020-09-04 23:00:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:00:44,321 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 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, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:00:44,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:00:44,321 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:00:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:00:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash -750949808, now seen corresponding path program 1 times [2020-09-04 23:00:44,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:00:44,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730735300] [2020-09-04 23:00:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:00:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:44,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:00:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:00:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:44,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:00:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-09-04 23:00:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:00:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:00:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 603 proven. 6 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2020-09-04 23:00:45,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730735300] [2020-09-04 23:00:45,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:00:45,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:00:45,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297235391] [2020-09-04 23:00:45,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:00:45,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:00:45,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:00:45,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:00:45,081 INFO L87 Difference]: Start difference. First operand 52885 states and 65173 transitions. Second operand 10 states. [2020-09-04 23:01:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:01:03,356 INFO L93 Difference]: Finished difference Result 112604 states and 139293 transitions. [2020-09-04 23:01:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:01:03,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 576 [2020-09-04 23:01:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:01:03,591 INFO L225 Difference]: With dead ends: 112604 [2020-09-04 23:01:03,592 INFO L226 Difference]: Without dead ends: 62675 [2020-09-04 23:01:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:01:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62675 states. [2020-09-04 23:01:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62675 to 61284. [2020-09-04 23:01:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61284 states. [2020-09-04 23:01:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61284 states to 61284 states and 75348 transitions. [2020-09-04 23:01:12,136 INFO L78 Accepts]: Start accepts. Automaton has 61284 states and 75348 transitions. Word has length 576 [2020-09-04 23:01:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:01:12,137 INFO L479 AbstractCegarLoop]: Abstraction has 61284 states and 75348 transitions. [2020-09-04 23:01:12,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:01:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 61284 states and 75348 transitions. [2020-09-04 23:01:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-09-04 23:01:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:01:12,208 INFO L422 BasicCegarLoop]: trace histogram [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, 5, 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, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:01:12,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:01:12,208 INFO L427 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:01:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:01:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1575497387, now seen corresponding path program 1 times [2020-09-04 23:01:12,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:01:12,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663746129] [2020-09-04 23:01:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:01:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:01:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:01:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:01:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2020-09-04 23:01:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-09-04 23:01:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 173 proven. 8 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-09-04 23:01:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663746129] [2020-09-04 23:01:12,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:01:12,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 23:01:12,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503152377] [2020-09-04 23:01:12,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:01:12,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:01:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:01:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:01:12,974 INFO L87 Difference]: Start difference. First operand 61284 states and 75348 transitions. Second operand 5 states. [2020-09-04 23:01:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:01:22,137 INFO L93 Difference]: Finished difference Result 118426 states and 145834 transitions. [2020-09-04 23:01:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:01:22,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 606 [2020-09-04 23:01:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:01:22,329 INFO L225 Difference]: With dead ends: 118426 [2020-09-04 23:01:22,329 INFO L226 Difference]: Without dead ends: 60518 [2020-09-04 23:01:22,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:01:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60518 states. [2020-09-04 23:01:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60518 to 60450. [2020-09-04 23:01:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60450 states. [2020-09-04 23:01:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60450 states to 60450 states and 74212 transitions. [2020-09-04 23:01:30,564 INFO L78 Accepts]: Start accepts. Automaton has 60450 states and 74212 transitions. Word has length 606 [2020-09-04 23:01:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:01:30,565 INFO L479 AbstractCegarLoop]: Abstraction has 60450 states and 74212 transitions. [2020-09-04 23:01:30,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:01:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 60450 states and 74212 transitions. [2020-09-04 23:01:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2020-09-04 23:01:30,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:01:30,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:01:30,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:01:30,638 INFO L427 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:01:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:01:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash 815162497, now seen corresponding path program 1 times [2020-09-04 23:01:30,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:01:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275900683] [2020-09-04 23:01:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:01:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:30,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:01:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:30,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:01:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:01:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:30,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-09-04 23:01:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 399 [2020-09-04 23:01:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:31,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-09-04 23:01:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:01:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 248 proven. 558 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2020-09-04 23:01:31,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275900683] [2020-09-04 23:01:31,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:01:31,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:01:31,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057410536] [2020-09-04 23:01:31,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:01:31,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:01:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:01:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:01:31,540 INFO L87 Difference]: Start difference. First operand 60450 states and 74212 transitions. Second operand 9 states. [2020-09-04 23:01:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:01:48,889 INFO L93 Difference]: Finished difference Result 133276 states and 164573 transitions. [2020-09-04 23:01:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:01:48,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 658 [2020-09-04 23:01:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:01:49,134 INFO L225 Difference]: With dead ends: 133276 [2020-09-04 23:01:49,134 INFO L226 Difference]: Without dead ends: 76202 [2020-09-04 23:01:49,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:01:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76202 states. [2020-09-04 23:01:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76202 to 74061. [2020-09-04 23:01:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74061 states. [2020-09-04 23:02:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74061 states to 74061 states and 89605 transitions. [2020-09-04 23:02:00,497 INFO L78 Accepts]: Start accepts. Automaton has 74061 states and 89605 transitions. Word has length 658 [2020-09-04 23:02:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:02:00,497 INFO L479 AbstractCegarLoop]: Abstraction has 74061 states and 89605 transitions. [2020-09-04 23:02:00,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:02:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 74061 states and 89605 transitions. [2020-09-04 23:02:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2020-09-04 23:02:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:02:00,574 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2020-09-04 23:02:00,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:02:00,574 INFO L427 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:02:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:02:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2116927898, now seen corresponding path program 1 times [2020-09-04 23:02:00,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:02:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507730744] [2020-09-04 23:02:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:02:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:00,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:02:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:00,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:02:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:00,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:02:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-09-04 23:02:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:01,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 411 [2020-09-04 23:02:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:01,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-09-04 23:02:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 328 proven. 608 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-09-04 23:02:01,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507730744] [2020-09-04 23:02:01,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:02:01,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:02:01,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467142699] [2020-09-04 23:02:01,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:02:01,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:02:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:02:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:02:01,480 INFO L87 Difference]: Start difference. First operand 74061 states and 89605 transitions. Second operand 10 states. [2020-09-04 23:02:03,464 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-09-04 23:02:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:02:15,760 INFO L93 Difference]: Finished difference Result 149335 states and 180688 transitions. [2020-09-04 23:02:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:02:15,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 670 [2020-09-04 23:02:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:02:16,011 INFO L225 Difference]: With dead ends: 149335 [2020-09-04 23:02:16,012 INFO L226 Difference]: Without dead ends: 78608 [2020-09-04 23:02:16,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:02:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78608 states. [2020-09-04 23:02:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78608 to 78371. [2020-09-04 23:02:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78371 states. [2020-09-04 23:02:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78371 states to 78371 states and 94578 transitions. [2020-09-04 23:02:27,887 INFO L78 Accepts]: Start accepts. Automaton has 78371 states and 94578 transitions. Word has length 670 [2020-09-04 23:02:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:02:27,887 INFO L479 AbstractCegarLoop]: Abstraction has 78371 states and 94578 transitions. [2020-09-04 23:02:27,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:02:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 78371 states and 94578 transitions. [2020-09-04 23:02:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-09-04 23:02:27,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:02:27,972 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-09-04 23:02:27,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:02:27,972 INFO L427 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:02:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:02:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1653524239, now seen corresponding path program 1 times [2020-09-04 23:02:27,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:02:27,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207140512] [2020-09-04 23:02:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:02:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:02:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:02:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:02:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2020-09-04 23:02:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2020-09-04 23:02:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:28,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:02:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:02:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 304 proven. 642 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-09-04 23:02:29,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207140512] [2020-09-04 23:02:29,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:02:29,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:02:29,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611166] [2020-09-04 23:02:29,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:02:29,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:02:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:02:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:02:29,506 INFO L87 Difference]: Start difference. First operand 78371 states and 94578 transitions. Second operand 15 states. [2020-09-04 23:02:30,646 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-04 23:02:31,096 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-09-04 23:02:31,454 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-09-04 23:02:31,600 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-09-04 23:02:32,173 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-09-04 23:02:34,684 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-09-04 23:02:36,958 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-09-04 23:02:37,787 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-09-04 23:02:38,222 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-09-04 23:02:39,107 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-09-04 23:02:41,514 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-09-04 23:02:43,502 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-04 23:02:45,842 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-04 23:02:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:02:59,965 INFO L93 Difference]: Finished difference Result 164891 states and 198929 transitions. [2020-09-04 23:02:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 23:02:59,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 680 [2020-09-04 23:02:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:03:00,254 INFO L225 Difference]: With dead ends: 164891 [2020-09-04 23:03:00,255 INFO L226 Difference]: Without dead ends: 86931 [2020-09-04 23:03:00,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=537, Invalid=2115, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:03:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86931 states. [2020-09-04 23:03:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86931 to 85041. [2020-09-04 23:03:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85041 states. [2020-09-04 23:03:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85041 states to 85041 states and 102463 transitions. [2020-09-04 23:03:14,913 INFO L78 Accepts]: Start accepts. Automaton has 85041 states and 102463 transitions. Word has length 680 [2020-09-04 23:03:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:03:14,913 INFO L479 AbstractCegarLoop]: Abstraction has 85041 states and 102463 transitions. [2020-09-04 23:03:14,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:03:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85041 states and 102463 transitions. [2020-09-04 23:03:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2020-09-04 23:03:15,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:03:15,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:03:15,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:03:15,173 INFO L427 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:03:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:03:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash 195382071, now seen corresponding path program 1 times [2020-09-04 23:03:15,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:03:15,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925253398] [2020-09-04 23:03:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:03:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:15,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:03:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:03:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:15,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:03:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2020-09-04 23:03:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:15,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2020-09-04 23:03:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:16,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-09-04 23:03:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:03:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 225 proven. 724 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-09-04 23:03:16,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925253398] [2020-09-04 23:03:16,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:03:16,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:03:16,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136583212] [2020-09-04 23:03:16,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:03:16,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:03:16,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:03:16,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:03:16,460 INFO L87 Difference]: Start difference. First operand 85041 states and 102463 transitions. Second operand 12 states. [2020-09-04 23:03:18,578 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-09-04 23:03:22,348 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-09-04 23:03:28,949 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-09-04 23:03:33,087 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-09-04 23:03:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:03:44,498 INFO L93 Difference]: Finished difference Result 174258 states and 210248 transitions. [2020-09-04 23:03:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:03:44,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 686 [2020-09-04 23:03:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:03:44,787 INFO L225 Difference]: With dead ends: 174258 [2020-09-04 23:03:44,787 INFO L226 Difference]: Without dead ends: 91952 [2020-09-04 23:03:44,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:03:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91952 states. [2020-09-04 23:04:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91952 to 90156. [2020-09-04 23:04:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90156 states. [2020-09-04 23:04:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90156 states to 90156 states and 108505 transitions. [2020-09-04 23:04:00,970 INFO L78 Accepts]: Start accepts. Automaton has 90156 states and 108505 transitions. Word has length 686 [2020-09-04 23:04:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:04:00,971 INFO L479 AbstractCegarLoop]: Abstraction has 90156 states and 108505 transitions. [2020-09-04 23:04:00,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:04:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 90156 states and 108505 transitions. [2020-09-04 23:04:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2020-09-04 23:04:01,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:04:01,068 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:04:01,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:04:01,068 INFO L427 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:04:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:04:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1298374939, now seen corresponding path program 1 times [2020-09-04 23:04:01,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:04:01,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443264892] [2020-09-04 23:04:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:04:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:04:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:04:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:04:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-09-04 23:04:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-09-04 23:04:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 539 [2020-09-04 23:04:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 538 proven. 99 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-09-04 23:04:01,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443264892] [2020-09-04 23:04:01,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:04:01,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:04:01,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909855810] [2020-09-04 23:04:01,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:04:01,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:04:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:04:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:04:01,699 INFO L87 Difference]: Start difference. First operand 90156 states and 108505 transitions. Second operand 7 states. [2020-09-04 23:04:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:04:19,747 INFO L93 Difference]: Finished difference Result 180515 states and 217239 transitions. [2020-09-04 23:04:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:04:19,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 687 [2020-09-04 23:04:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:04:20,021 INFO L225 Difference]: With dead ends: 180515 [2020-09-04 23:04:20,021 INFO L226 Difference]: Without dead ends: 90571 [2020-09-04 23:04:20,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:04:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90571 states. [2020-09-04 23:04:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90571 to 89915. [2020-09-04 23:04:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89915 states. [2020-09-04 23:04:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89915 states to 89915 states and 106190 transitions. [2020-09-04 23:04:35,024 INFO L78 Accepts]: Start accepts. Automaton has 89915 states and 106190 transitions. Word has length 687 [2020-09-04 23:04:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:04:35,025 INFO L479 AbstractCegarLoop]: Abstraction has 89915 states and 106190 transitions. [2020-09-04 23:04:35,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:04:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 89915 states and 106190 transitions. [2020-09-04 23:04:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2020-09-04 23:04:35,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:04:35,136 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-04 23:04:35,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:04:35,136 INFO L427 AbstractCegarLoop]: === Iteration 23 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:04:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:04:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 331157881, now seen corresponding path program 1 times [2020-09-04 23:04:35,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:04:35,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593573394] [2020-09-04 23:04:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:04:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:04:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:04:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-09-04 23:04:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-09-04 23:04:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-09-04 23:04:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-09-04 23:04:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:35,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 643 [2020-09-04 23:04:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:04:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 494 proven. 603 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2020-09-04 23:04:36,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593573394] [2020-09-04 23:04:36,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:04:36,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:04:36,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280111764] [2020-09-04 23:04:36,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:04:36,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:04:36,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:04:36,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:04:36,188 INFO L87 Difference]: Start difference. First operand 89915 states and 106190 transitions. Second operand 10 states. [2020-09-04 23:04:38,611 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-09-04 23:04:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:04:58,750 INFO L93 Difference]: Finished difference Result 189476 states and 224194 transitions. [2020-09-04 23:04:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:04:58,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 791 [2020-09-04 23:04:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:04:59,415 INFO L225 Difference]: With dead ends: 189476 [2020-09-04 23:04:59,415 INFO L226 Difference]: Without dead ends: 102937 [2020-09-04 23:04:59,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:04:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102937 states. [2020-09-04 23:05:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102937 to 100311. [2020-09-04 23:05:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100311 states. [2020-09-04 23:05:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100311 states to 100311 states and 118451 transitions. [2020-09-04 23:05:17,332 INFO L78 Accepts]: Start accepts. Automaton has 100311 states and 118451 transitions. Word has length 791 [2020-09-04 23:05:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:05:17,333 INFO L479 AbstractCegarLoop]: Abstraction has 100311 states and 118451 transitions. [2020-09-04 23:05:17,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:05:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 100311 states and 118451 transitions. [2020-09-04 23:05:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-09-04 23:05:17,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:05:17,445 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:05:17,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:05:17,445 INFO L427 AbstractCegarLoop]: === Iteration 24 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:05:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:05:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1570166223, now seen corresponding path program 1 times [2020-09-04 23:05:17,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:05:17,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134360155] [2020-09-04 23:05:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:05:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:05:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:05:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:05:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 333 [2020-09-04 23:05:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-09-04 23:05:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 543 [2020-09-04 23:05:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-09-04 23:05:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1797 backedges. 267 proven. 16 refuted. 0 times theorem prover too weak. 1514 trivial. 0 not checked. [2020-09-04 23:05:18,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134360155] [2020-09-04 23:05:18,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:05:18,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 23:05:18,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855240420] [2020-09-04 23:05:18,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:05:18,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:05:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:05:18,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:05:18,274 INFO L87 Difference]: Start difference. First operand 100311 states and 118451 transitions. Second operand 5 states. [2020-09-04 23:05:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:05:34,504 INFO L93 Difference]: Finished difference Result 197168 states and 233018 transitions. [2020-09-04 23:05:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:05:34,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 802 [2020-09-04 23:05:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:05:34,827 INFO L225 Difference]: With dead ends: 197168 [2020-09-04 23:05:34,827 INFO L226 Difference]: Without dead ends: 100237 [2020-09-04 23:05:34,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:05:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100237 states. [2020-09-04 23:05:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100237 to 100109. [2020-09-04 23:05:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100109 states. [2020-09-04 23:05:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100109 states to 100109 states and 118171 transitions. [2020-09-04 23:05:53,003 INFO L78 Accepts]: Start accepts. Automaton has 100109 states and 118171 transitions. Word has length 802 [2020-09-04 23:05:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:05:53,004 INFO L479 AbstractCegarLoop]: Abstraction has 100109 states and 118171 transitions. [2020-09-04 23:05:53,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:05:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 100109 states and 118171 transitions. [2020-09-04 23:05:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-09-04 23:05:53,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:05:53,126 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:05:53,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:05:53,126 INFO L427 AbstractCegarLoop]: === Iteration 25 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:05:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:05:53,127 INFO L82 PathProgramCache]: Analyzing trace with hash -293819967, now seen corresponding path program 1 times [2020-09-04 23:05:53,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:05:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15782855] [2020-09-04 23:05:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:05:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:05:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:05:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-09-04 23:05:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-09-04 23:05:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 345 [2020-09-04 23:05:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:05:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2020-09-04 23:05:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:53,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-09-04 23:05:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:05:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2250 backedges. 625 proven. 257 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-09-04 23:05:54,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15782855] [2020-09-04 23:05:54,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:05:54,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:05:54,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7671766] [2020-09-04 23:05:54,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:05:54,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:05:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:05:54,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:05:54,074 INFO L87 Difference]: Start difference. First operand 100109 states and 118171 transitions. Second operand 7 states. [2020-09-04 23:06:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:06:13,753 INFO L93 Difference]: Finished difference Result 209414 states and 247428 transitions. [2020-09-04 23:06:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:06:13,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 814 [2020-09-04 23:06:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:06:14,604 INFO L225 Difference]: With dead ends: 209414 [2020-09-04 23:06:14,605 INFO L226 Difference]: Without dead ends: 109716 [2020-09-04 23:06:14,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:06:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109716 states. [2020-09-04 23:06:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109716 to 105315. [2020-09-04 23:06:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105315 states. [2020-09-04 23:06:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105315 states to 105315 states and 123007 transitions. [2020-09-04 23:06:33,179 INFO L78 Accepts]: Start accepts. Automaton has 105315 states and 123007 transitions. Word has length 814 [2020-09-04 23:06:33,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:06:33,179 INFO L479 AbstractCegarLoop]: Abstraction has 105315 states and 123007 transitions. [2020-09-04 23:06:33,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:06:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 105315 states and 123007 transitions. [2020-09-04 23:06:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2020-09-04 23:06:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:06:33,300 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:06:33,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:06:33,300 INFO L427 AbstractCegarLoop]: === Iteration 26 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:06:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:06:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -228854500, now seen corresponding path program 1 times [2020-09-04 23:06:33,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:06:33,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334196365] [2020-09-04 23:06:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:06:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:06:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:06:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:06:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-09-04 23:06:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-09-04 23:06:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2020-09-04 23:06:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:33,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-09-04 23:06:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:06:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 539 proven. 308 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2020-09-04 23:06:34,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334196365] [2020-09-04 23:06:34,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:06:34,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:06:34,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275993005] [2020-09-04 23:06:34,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:06:34,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:06:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:06:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:06:34,513 INFO L87 Difference]: Start difference. First operand 105315 states and 123007 transitions. Second operand 11 states. [2020-09-04 23:06:35,743 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-09-04 23:06:38,496 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-09-04 23:06:40,746 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-04 23:07:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:07:02,388 INFO L93 Difference]: Finished difference Result 206706 states and 241795 transitions. [2020-09-04 23:07:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:07:02,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 814 [2020-09-04 23:07:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:07:02,717 INFO L225 Difference]: With dead ends: 206706 [2020-09-04 23:07:02,717 INFO L226 Difference]: Without dead ends: 105385 [2020-09-04 23:07:02,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:07:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105385 states. [2020-09-04 23:07:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105385 to 105106. [2020-09-04 23:07:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105106 states. [2020-09-04 23:07:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105106 states to 105106 states and 122536 transitions. [2020-09-04 23:07:24,488 INFO L78 Accepts]: Start accepts. Automaton has 105106 states and 122536 transitions. Word has length 814 [2020-09-04 23:07:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:07:24,488 INFO L479 AbstractCegarLoop]: Abstraction has 105106 states and 122536 transitions. [2020-09-04 23:07:24,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:07:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 105106 states and 122536 transitions. [2020-09-04 23:07:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2020-09-04 23:07:24,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:07:24,597 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:07:24,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:07:24,598 INFO L427 AbstractCegarLoop]: === Iteration 27 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:07:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:07:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash -587128004, now seen corresponding path program 1 times [2020-09-04 23:07:24,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:07:24,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472477684] [2020-09-04 23:07:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:07:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:07:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:24,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:07:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:24,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-04 23:07:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:24,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2020-09-04 23:07:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:24,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-09-04 23:07:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 559 [2020-09-04 23:07:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:25,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-09-04 23:07:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:07:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1797 backedges. 597 proven. 198 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2020-09-04 23:07:25,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472477684] [2020-09-04 23:07:25,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:07:25,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:07:25,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741335148] [2020-09-04 23:07:25,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:07:25,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:07:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:07:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:07:25,353 INFO L87 Difference]: Start difference. First operand 105106 states and 122536 transitions. Second operand 8 states. [2020-09-04 23:07:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:07:49,805 INFO L93 Difference]: Finished difference Result 203794 states and 237246 transitions. [2020-09-04 23:07:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:07:49,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 818 [2020-09-04 23:07:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:07:50,134 INFO L225 Difference]: With dead ends: 203794 [2020-09-04 23:07:50,135 INFO L226 Difference]: Without dead ends: 99099 [2020-09-04 23:07:50,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:07:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99099 states. [2020-09-04 23:08:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99099 to 96259. [2020-09-04 23:08:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96259 states. [2020-09-04 23:08:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96259 states to 96259 states and 110438 transitions. [2020-09-04 23:08:11,198 INFO L78 Accepts]: Start accepts. Automaton has 96259 states and 110438 transitions. Word has length 818 [2020-09-04 23:08:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:08:11,199 INFO L479 AbstractCegarLoop]: Abstraction has 96259 states and 110438 transitions. [2020-09-04 23:08:11,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:08:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 96259 states and 110438 transitions. [2020-09-04 23:08:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2020-09-04 23:08:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:08:11,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-04 23:08:11,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:08:11,332 INFO L427 AbstractCegarLoop]: === Iteration 28 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:08:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:08:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1318803644, now seen corresponding path program 1 times [2020-09-04 23:08:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:08:11,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084988889] [2020-09-04 23:08:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:08:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:11,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:08:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:08:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-09-04 23:08:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 355 [2020-09-04 23:08:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:11,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-09-04 23:08:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:12,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-09-04 23:08:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2020-09-04 23:08:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1876 backedges. 757 proven. 367 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-09-04 23:08:12,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084988889] [2020-09-04 23:08:12,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:08:12,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:08:12,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271101665] [2020-09-04 23:08:12,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:08:12,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:08:12,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:08:12,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:08:12,583 INFO L87 Difference]: Start difference. First operand 96259 states and 110438 transitions. Second operand 9 states. [2020-09-04 23:08:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:08:43,829 INFO L93 Difference]: Finished difference Result 215642 states and 247907 transitions. [2020-09-04 23:08:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:08:43,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 855 [2020-09-04 23:08:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:08:44,250 INFO L225 Difference]: With dead ends: 215642 [2020-09-04 23:08:44,251 INFO L226 Difference]: Without dead ends: 125600 [2020-09-04 23:08:44,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:08:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125600 states. [2020-09-04 23:09:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125600 to 121977. [2020-09-04 23:09:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121977 states. [2020-09-04 23:09:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121977 states to 121977 states and 139389 transitions. [2020-09-04 23:09:09,981 INFO L78 Accepts]: Start accepts. Automaton has 121977 states and 139389 transitions. Word has length 855 [2020-09-04 23:09:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:09,982 INFO L479 AbstractCegarLoop]: Abstraction has 121977 states and 139389 transitions. [2020-09-04 23:09:09,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:09:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 121977 states and 139389 transitions. [2020-09-04 23:09:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1241 [2020-09-04 23:09:10,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:10,118 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:10,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:09:10,118 INFO L427 AbstractCegarLoop]: === Iteration 29 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 28463548, now seen corresponding path program 1 times [2020-09-04 23:09:10,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:10,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137403019] [2020-09-04 23:09:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 23:09:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-09-04 23:09:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-09-04 23:09:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 479 [2020-09-04 23:09:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 609 [2020-09-04 23:09:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-09-04 23:09:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 839 [2020-09-04 23:09:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 981 [2020-09-04 23:09:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1092 [2020-09-04 23:09:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4379 backedges. 958 proven. 1001 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-09-04 23:09:12,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137403019] [2020-09-04 23:09:12,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:12,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:09:12,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365007908] [2020-09-04 23:09:12,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:09:12,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:09:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:09:12,246 INFO L87 Difference]: Start difference. First operand 121977 states and 139389 transitions. Second operand 9 states.