/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/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:07:32,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:07:32,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:07:32,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:07:32,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:07:32,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:07:32,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:07:32,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:07:32,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:07:32,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:07:32,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:07:32,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:07:32,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:07:32,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:07:32,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:07:32,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:07:32,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:07:32,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:07:32,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:07:32,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:07:32,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:07:32,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:07:32,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:07:32,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:07:32,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 18:07:32,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:07:32,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:07:32,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:07:32,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:07:32,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:07:32,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:07:32,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:07:32,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:07:32,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:07:32,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:07:32,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:07:32,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:07:32,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:07:32,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:07:32,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:07:32,079 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:07:32,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:07:32,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:07:32,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:07:32,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:07:32,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:07:32,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:07:32,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:07:32,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:07:32,081 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:07:32,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:07:32,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:07:32,081 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:07:32,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:07:32,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:07:32,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:07:32,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:07:32,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:07:32,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:07:32,082 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 [2020-07-17 18:07:32,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:07:32,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:07:32,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:07:32,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:07:32,416 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:07:32,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-17 18:07:32,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ff9a2de/b140f18091f64adf88ded17fa81797b8/FLAG2db4822fc [2020-07-17 18:07:32,948 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:07:32,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-07-17 18:07:32,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ff9a2de/b140f18091f64adf88ded17fa81797b8/FLAG2db4822fc [2020-07-17 18:07:33,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ff9a2de/b140f18091f64adf88ded17fa81797b8 [2020-07-17 18:07:33,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:07:33,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:07:33,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:33,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:07:33,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:07:33,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30564470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33, skipping insertion in model container [2020-07-17 18:07:33,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:07:33,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:07:33,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:33,614 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:07:33,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:33,652 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:07:33,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33 WrapperNode [2020-07-17 18:07:33,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:33,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:07:33,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:07:33,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:07:33,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... [2020-07-17 18:07:33,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:07:33,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:07:33,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:07:33,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:07:33,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:07:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:07:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:07:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:07:33,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:07:33,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:07:33,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:07:33,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:07:33,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:07:34,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:07:34,143 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 18:07:34,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:34 BoogieIcfgContainer [2020-07-17 18:07:34,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:07:34,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:07:34,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:07:34,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:07:34,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:07:33" (1/3) ... [2020-07-17 18:07:34,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d744d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:34, skipping insertion in model container [2020-07-17 18:07:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:33" (2/3) ... [2020-07-17 18:07:34,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d744d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:34, skipping insertion in model container [2020-07-17 18:07:34,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:34" (3/3) ... [2020-07-17 18:07:34,160 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-07-17 18:07:34,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:07:34,179 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:07:34,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:07:34,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:07:34,223 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:07:34,223 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:07:34,223 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:07:34,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:07:34,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:07:34,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:07:34,224 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:07:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-07-17 18:07:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 18:07:34,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:34,256 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] [2020-07-17 18:07:34,256 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1441743938, now seen corresponding path program 1 times [2020-07-17 18:07:34,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:34,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190290348] [2020-07-17 18:07:34,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:34,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190290348] [2020-07-17 18:07:34,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:34,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:07:34,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334788181] [2020-07-17 18:07:34,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:07:34,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:07:34,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:07:34,541 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 5 states. [2020-07-17 18:07:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:34,855 INFO L93 Difference]: Finished difference Result 143 states and 210 transitions. [2020-07-17 18:07:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:34,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-17 18:07:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:34,869 INFO L225 Difference]: With dead ends: 143 [2020-07-17 18:07:34,870 INFO L226 Difference]: Without dead ends: 81 [2020-07-17 18:07:34,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-17 18:07:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-07-17 18:07:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-17 18:07:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-07-17 18:07:34,945 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 25 [2020-07-17 18:07:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:34,946 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-07-17 18:07:34,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:07:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-07-17 18:07:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-17 18:07:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:34,949 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] [2020-07-17 18:07:34,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:07:34,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1406858677, now seen corresponding path program 1 times [2020-07-17 18:07:34,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:34,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659914082] [2020-07-17 18:07:34,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:35,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659914082] [2020-07-17 18:07:35,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:35,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:07:35,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565788773] [2020-07-17 18:07:35,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:07:35,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:07:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:07:35,066 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 5 states. [2020-07-17 18:07:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:35,239 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-07-17 18:07:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:35,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-07-17 18:07:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:35,245 INFO L225 Difference]: With dead ends: 85 [2020-07-17 18:07:35,245 INFO L226 Difference]: Without dead ends: 83 [2020-07-17 18:07:35,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-17 18:07:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-07-17 18:07:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 18:07:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-07-17 18:07:35,268 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 25 [2020-07-17 18:07:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:35,269 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-07-17 18:07:35,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:07:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-07-17 18:07:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 18:07:35,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:35,271 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-17 18:07:35,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:07:35,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1771333938, now seen corresponding path program 1 times [2020-07-17 18:07:35,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:35,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324645322] [2020-07-17 18:07:35,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:07:35,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324645322] [2020-07-17 18:07:35,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:35,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:07:35,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278159563] [2020-07-17 18:07:35,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:07:35,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:07:35,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:07:35,372 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 5 states. [2020-07-17 18:07:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:35,581 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2020-07-17 18:07:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:35,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-17 18:07:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:35,584 INFO L225 Difference]: With dead ends: 116 [2020-07-17 18:07:35,584 INFO L226 Difference]: Without dead ends: 114 [2020-07-17 18:07:35,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-17 18:07:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-07-17 18:07:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-17 18:07:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2020-07-17 18:07:35,631 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 30 [2020-07-17 18:07:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:35,632 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2020-07-17 18:07:35,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:07:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2020-07-17 18:07:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 18:07:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:35,635 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-17 18:07:35,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:07:35,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash 456630219, now seen corresponding path program 1 times [2020-07-17 18:07:35,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:35,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895831219] [2020-07-17 18:07:35,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:07:35,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895831219] [2020-07-17 18:07:35,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:35,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 18:07:35,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678472316] [2020-07-17 18:07:35,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:07:35,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:35,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:07:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:35,768 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand 6 states. [2020-07-17 18:07:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:35,935 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-07-17 18:07:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 18:07:35,935 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-07-17 18:07:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:35,938 INFO L225 Difference]: With dead ends: 106 [2020-07-17 18:07:35,938 INFO L226 Difference]: Without dead ends: 104 [2020-07-17 18:07:35,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:07:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-17 18:07:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-07-17 18:07:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-17 18:07:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-07-17 18:07:35,960 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 35 [2020-07-17 18:07:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:35,960 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-07-17 18:07:35,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:07:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-07-17 18:07:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 18:07:35,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:35,963 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:35,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:07:35,963 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash 364478305, now seen corresponding path program 1 times [2020-07-17 18:07:35,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:35,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781500352] [2020-07-17 18:07:35,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-17 18:07:36,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781500352] [2020-07-17 18:07:36,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:36,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:07:36,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621822087] [2020-07-17 18:07:36,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:07:36,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:07:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:07:36,103 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 5 states. [2020-07-17 18:07:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:36,215 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2020-07-17 18:07:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:36,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-07-17 18:07:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:36,219 INFO L225 Difference]: With dead ends: 135 [2020-07-17 18:07:36,219 INFO L226 Difference]: Without dead ends: 133 [2020-07-17 18:07:36,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:07:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-17 18:07:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-07-17 18:07:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-17 18:07:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-07-17 18:07:36,273 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 40 [2020-07-17 18:07:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:36,274 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-07-17 18:07:36,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:07:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-07-17 18:07:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-17 18:07:36,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:36,283 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2020-07-17 18:07:36,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:07:36,284 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:36,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:36,284 INFO L82 PathProgramCache]: Analyzing trace with hash 914533499, now seen corresponding path program 1 times [2020-07-17 18:07:36,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:36,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727802728] [2020-07-17 18:07:36,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 18:07:36,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727802728] [2020-07-17 18:07:36,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:36,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:07:36,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884611709] [2020-07-17 18:07:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:07:36,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:07:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:07:36,426 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 5 states. [2020-07-17 18:07:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:36,527 INFO L93 Difference]: Finished difference Result 229 states and 302 transitions. [2020-07-17 18:07:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:07:36,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-07-17 18:07:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:36,533 INFO L225 Difference]: With dead ends: 229 [2020-07-17 18:07:36,534 INFO L226 Difference]: Without dead ends: 128 [2020-07-17 18:07:36,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-17 18:07:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-17 18:07:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-17 18:07:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2020-07-17 18:07:36,579 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 58 [2020-07-17 18:07:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:36,588 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2020-07-17 18:07:36,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:07:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2020-07-17 18:07:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-17 18:07:36,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:36,591 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:36,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:07:36,591 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1807369608, now seen corresponding path program 1 times [2020-07-17 18:07:36,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:36,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592975559] [2020-07-17 18:07:36,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-17 18:07:36,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592975559] [2020-07-17 18:07:36,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:36,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:07:36,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568660941] [2020-07-17 18:07:36,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:07:36,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:36,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:07:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:36,775 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand 7 states. [2020-07-17 18:07:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:37,033 INFO L93 Difference]: Finished difference Result 136 states and 172 transitions. [2020-07-17 18:07:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:07:37,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-07-17 18:07:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:37,036 INFO L225 Difference]: With dead ends: 136 [2020-07-17 18:07:37,036 INFO L226 Difference]: Without dead ends: 134 [2020-07-17 18:07:37,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-17 18:07:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-07-17 18:07:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-17 18:07:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 168 transitions. [2020-07-17 18:07:37,057 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 168 transitions. Word has length 64 [2020-07-17 18:07:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:37,058 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 168 transitions. [2020-07-17 18:07:37,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:07:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 168 transitions. [2020-07-17 18:07:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 18:07:37,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:37,060 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:37,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:07:37,060 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1715909932, now seen corresponding path program 1 times [2020-07-17 18:07:37,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:37,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882845481] [2020-07-17 18:07:37,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 18:07:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882845481] [2020-07-17 18:07:37,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:37,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:07:37,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841249044] [2020-07-17 18:07:37,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:07:37,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:07:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:37,184 INFO L87 Difference]: Start difference. First operand 132 states and 168 transitions. Second operand 7 states. [2020-07-17 18:07:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:37,369 INFO L93 Difference]: Finished difference Result 162 states and 205 transitions. [2020-07-17 18:07:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:07:37,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-07-17 18:07:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:37,372 INFO L225 Difference]: With dead ends: 162 [2020-07-17 18:07:37,372 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 18:07:37,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 18:07:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2020-07-17 18:07:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-17 18:07:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 185 transitions. [2020-07-17 18:07:37,405 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 185 transitions. Word has length 69 [2020-07-17 18:07:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:37,405 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 185 transitions. [2020-07-17 18:07:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:07:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 185 transitions. [2020-07-17 18:07:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-17 18:07:37,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:37,409 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2020-07-17 18:07:37,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 18:07:37,410 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1298936315, now seen corresponding path program 1 times [2020-07-17 18:07:37,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:37,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813999575] [2020-07-17 18:07:37,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 18:07:37,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813999575] [2020-07-17 18:07:37,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:37,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:07:37,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429267283] [2020-07-17 18:07:37,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:07:37,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:07:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:37,527 INFO L87 Difference]: Start difference. First operand 146 states and 185 transitions. Second operand 7 states. [2020-07-17 18:07:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:37,771 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2020-07-17 18:07:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:07:37,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-07-17 18:07:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:37,780 INFO L225 Difference]: With dead ends: 210 [2020-07-17 18:07:37,781 INFO L226 Difference]: Without dead ends: 206 [2020-07-17 18:07:37,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-17 18:07:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2020-07-17 18:07:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-17 18:07:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2020-07-17 18:07:37,822 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 71 [2020-07-17 18:07:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:37,825 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2020-07-17 18:07:37,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:07:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2020-07-17 18:07:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-17 18:07:37,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:37,827 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:37,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 18:07:37,828 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1528474552, now seen corresponding path program 1 times [2020-07-17 18:07:37,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:37,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653320604] [2020-07-17 18:07:37,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-17 18:07:38,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653320604] [2020-07-17 18:07:38,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:38,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 18:07:38,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611386446] [2020-07-17 18:07:38,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:07:38,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:07:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:07:38,037 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand 8 states. [2020-07-17 18:07:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:38,264 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2020-07-17 18:07:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 18:07:38,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-07-17 18:07:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:38,270 INFO L225 Difference]: With dead ends: 194 [2020-07-17 18:07:38,270 INFO L226 Difference]: Without dead ends: 192 [2020-07-17 18:07:38,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:07:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-17 18:07:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-07-17 18:07:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-17 18:07:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2020-07-17 18:07:38,299 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 74 [2020-07-17 18:07:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:38,299 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2020-07-17 18:07:38,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:07:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2020-07-17 18:07:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 18:07:38,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:38,304 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:38,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 18:07:38,305 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1530703596, now seen corresponding path program 1 times [2020-07-17 18:07:38,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:38,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030426387] [2020-07-17 18:07:38,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 18:07:38,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030426387] [2020-07-17 18:07:38,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:38,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:07:38,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337260183] [2020-07-17 18:07:38,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:07:38,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:38,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:07:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:38,428 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand 7 states. [2020-07-17 18:07:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:38,591 INFO L93 Difference]: Finished difference Result 220 states and 283 transitions. [2020-07-17 18:07:38,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:07:38,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-07-17 18:07:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:38,594 INFO L225 Difference]: With dead ends: 220 [2020-07-17 18:07:38,594 INFO L226 Difference]: Without dead ends: 218 [2020-07-17 18:07:38,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-17 18:07:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2020-07-17 18:07:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-17 18:07:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-07-17 18:07:38,626 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 79 [2020-07-17 18:07:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:38,626 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-07-17 18:07:38,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:07:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-07-17 18:07:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-17 18:07:38,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:38,628 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2020-07-17 18:07:38,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 18:07:38,628 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1064000984, now seen corresponding path program 1 times [2020-07-17 18:07:38,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:38,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402436864] [2020-07-17 18:07:38,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 18:07:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402436864] [2020-07-17 18:07:38,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:38,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 18:07:38,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284692360] [2020-07-17 18:07:38,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:07:38,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:38,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:07:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:07:38,746 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 7 states. [2020-07-17 18:07:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:38,946 INFO L93 Difference]: Finished difference Result 252 states and 330 transitions. [2020-07-17 18:07:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:07:38,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-07-17 18:07:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:38,949 INFO L225 Difference]: With dead ends: 252 [2020-07-17 18:07:38,949 INFO L226 Difference]: Without dead ends: 246 [2020-07-17 18:07:38,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-17 18:07:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2020-07-17 18:07:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-17 18:07:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2020-07-17 18:07:38,986 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 81 [2020-07-17 18:07:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:38,986 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2020-07-17 18:07:38,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:07:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2020-07-17 18:07:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-17 18:07:38,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:38,989 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:38,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 18:07:38,989 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash -895183749, now seen corresponding path program 1 times [2020-07-17 18:07:38,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:38,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973812517] [2020-07-17 18:07:38,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-17 18:07:39,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973812517] [2020-07-17 18:07:39,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:39,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-17 18:07:39,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192943713] [2020-07-17 18:07:39,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:07:39,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:39,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:07:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:07:39,134 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand 10 states. [2020-07-17 18:07:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:39,477 INFO L93 Difference]: Finished difference Result 236 states and 307 transitions. [2020-07-17 18:07:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 18:07:39,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-07-17 18:07:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:39,481 INFO L225 Difference]: With dead ends: 236 [2020-07-17 18:07:39,481 INFO L226 Difference]: Without dead ends: 234 [2020-07-17 18:07:39,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:07:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-17 18:07:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-07-17 18:07:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-17 18:07:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 305 transitions. [2020-07-17 18:07:39,511 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 305 transitions. Word has length 90 [2020-07-17 18:07:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:39,511 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 305 transitions. [2020-07-17 18:07:39,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:07:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 305 transitions. [2020-07-17 18:07:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-17 18:07:39,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:39,513 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:39,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 18:07:39,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:39,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1272604239, now seen corresponding path program 1 times [2020-07-17 18:07:39,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:39,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291703142] [2020-07-17 18:07:39,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 18:07:39,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291703142] [2020-07-17 18:07:39,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:39,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 18:07:39,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279469458] [2020-07-17 18:07:39,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:07:39,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:07:39,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:07:39,656 INFO L87 Difference]: Start difference. First operand 234 states and 305 transitions. Second operand 9 states. [2020-07-17 18:07:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:39,891 INFO L93 Difference]: Finished difference Result 262 states and 335 transitions. [2020-07-17 18:07:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:07:39,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-07-17 18:07:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:39,894 INFO L225 Difference]: With dead ends: 262 [2020-07-17 18:07:39,894 INFO L226 Difference]: Without dead ends: 260 [2020-07-17 18:07:39,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:07:39,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-17 18:07:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2020-07-17 18:07:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-07-17 18:07:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 318 transitions. [2020-07-17 18:07:39,926 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 318 transitions. Word has length 95 [2020-07-17 18:07:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:39,926 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 318 transitions. [2020-07-17 18:07:39,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:07:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 318 transitions. [2020-07-17 18:07:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-17 18:07:39,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:39,931 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2020-07-17 18:07:39,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 18:07:39,932 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -960498755, now seen corresponding path program 1 times [2020-07-17 18:07:39,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:39,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113637585] [2020-07-17 18:07:39,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 18:07:40,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113637585] [2020-07-17 18:07:40,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:40,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 18:07:40,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263603564] [2020-07-17 18:07:40,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:07:40,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:07:40,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:07:40,071 INFO L87 Difference]: Start difference. First operand 246 states and 318 transitions. Second operand 9 states. [2020-07-17 18:07:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:40,348 INFO L93 Difference]: Finished difference Result 293 states and 378 transitions. [2020-07-17 18:07:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:07:40,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 110 [2020-07-17 18:07:40,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:40,352 INFO L225 Difference]: With dead ends: 293 [2020-07-17 18:07:40,352 INFO L226 Difference]: Without dead ends: 291 [2020-07-17 18:07:40,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:07:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-17 18:07:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 270. [2020-07-17 18:07:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-17 18:07:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 349 transitions. [2020-07-17 18:07:40,380 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 349 transitions. Word has length 110 [2020-07-17 18:07:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:40,380 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 349 transitions. [2020-07-17 18:07:40,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:07:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 349 transitions. [2020-07-17 18:07:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-17 18:07:40,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:40,383 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2020-07-17 18:07:40,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 18:07:40,383 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:40,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1038471395, now seen corresponding path program 1 times [2020-07-17 18:07:40,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:40,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053435886] [2020-07-17 18:07:40,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 18:07:40,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053435886] [2020-07-17 18:07:40,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:40,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 18:07:40,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541025301] [2020-07-17 18:07:40,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:07:40,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:07:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:07:40,493 INFO L87 Difference]: Start difference. First operand 270 states and 349 transitions. Second operand 9 states. [2020-07-17 18:07:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:40,789 INFO L93 Difference]: Finished difference Result 372 states and 494 transitions. [2020-07-17 18:07:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 18:07:40,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 110 [2020-07-17 18:07:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:40,794 INFO L225 Difference]: With dead ends: 372 [2020-07-17 18:07:40,794 INFO L226 Difference]: Without dead ends: 368 [2020-07-17 18:07:40,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:07:40,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-07-17 18:07:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 345. [2020-07-17 18:07:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-07-17 18:07:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 458 transitions. [2020-07-17 18:07:40,829 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 458 transitions. Word has length 110 [2020-07-17 18:07:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:40,830 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 458 transitions. [2020-07-17 18:07:40,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:07:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 458 transitions. [2020-07-17 18:07:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-17 18:07:40,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:40,833 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 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] [2020-07-17 18:07:40,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 18:07:40,833 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1539222205, now seen corresponding path program 1 times [2020-07-17 18:07:40,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:40,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759977166] [2020-07-17 18:07:40,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 18:07:40,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759977166] [2020-07-17 18:07:40,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:40,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 18:07:40,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486669054] [2020-07-17 18:07:40,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:07:40,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:07:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:07:40,945 INFO L87 Difference]: Start difference. First operand 345 states and 458 transitions. Second operand 9 states. [2020-07-17 18:07:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:41,241 INFO L93 Difference]: Finished difference Result 379 states and 496 transitions. [2020-07-17 18:07:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:07:41,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2020-07-17 18:07:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:41,246 INFO L225 Difference]: With dead ends: 379 [2020-07-17 18:07:41,246 INFO L226 Difference]: Without dead ends: 377 [2020-07-17 18:07:41,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:07:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-07-17 18:07:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2020-07-17 18:07:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-07-17 18:07:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 475 transitions. [2020-07-17 18:07:41,284 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 475 transitions. Word has length 120 [2020-07-17 18:07:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:41,284 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 475 transitions. [2020-07-17 18:07:41,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:07:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 475 transitions. [2020-07-17 18:07:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-17 18:07:41,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:41,287 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 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] [2020-07-17 18:07:41,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 18:07:41,287 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 871752502, now seen corresponding path program 1 times [2020-07-17 18:07:41,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:41,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281578644] [2020-07-17 18:07:41,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 18:07:41,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281578644] [2020-07-17 18:07:41,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:41,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 18:07:41,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112607368] [2020-07-17 18:07:41,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:07:41,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:07:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:07:41,423 INFO L87 Difference]: Start difference. First operand 359 states and 475 transitions. Second operand 11 states. [2020-07-17 18:07:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:41,766 INFO L93 Difference]: Finished difference Result 424 states and 562 transitions. [2020-07-17 18:07:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 18:07:41,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 120 [2020-07-17 18:07:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:41,773 INFO L225 Difference]: With dead ends: 424 [2020-07-17 18:07:41,773 INFO L226 Difference]: Without dead ends: 418 [2020-07-17 18:07:41,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:07:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-17 18:07:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 398. [2020-07-17 18:07:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-07-17 18:07:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 529 transitions. [2020-07-17 18:07:41,818 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 529 transitions. Word has length 120 [2020-07-17 18:07:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 529 transitions. [2020-07-17 18:07:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:07:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 529 transitions. [2020-07-17 18:07:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-17 18:07:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:41,821 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 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] [2020-07-17 18:07:41,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 18:07:41,821 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1668448602, now seen corresponding path program 1 times [2020-07-17 18:07:41,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:41,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862964093] [2020-07-17 18:07:41,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-07-17 18:07:42,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862964093] [2020-07-17 18:07:42,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:42,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 18:07:42,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970131690] [2020-07-17 18:07:42,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:07:42,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:07:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:07:42,012 INFO L87 Difference]: Start difference. First operand 398 states and 529 transitions. Second operand 11 states. [2020-07-17 18:07:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:42,439 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2020-07-17 18:07:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 18:07:42,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-07-17 18:07:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:42,446 INFO L225 Difference]: With dead ends: 432 [2020-07-17 18:07:42,446 INFO L226 Difference]: Without dead ends: 430 [2020-07-17 18:07:42,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:07:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-07-17 18:07:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 410. [2020-07-17 18:07:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-07-17 18:07:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 542 transitions. [2020-07-17 18:07:42,516 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 542 transitions. Word has length 136 [2020-07-17 18:07:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:42,517 INFO L479 AbstractCegarLoop]: Abstraction has 410 states and 542 transitions. [2020-07-17 18:07:42,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:07:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 542 transitions. [2020-07-17 18:07:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-17 18:07:42,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:42,522 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:42,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 18:07:42,523 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash 362381850, now seen corresponding path program 1 times [2020-07-17 18:07:42,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:42,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67552627] [2020-07-17 18:07:42,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 18:07:42,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67552627] [2020-07-17 18:07:42,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:42,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 18:07:42,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014118905] [2020-07-17 18:07:42,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:07:42,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:07:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:07:42,793 INFO L87 Difference]: Start difference. First operand 410 states and 542 transitions. Second operand 11 states. [2020-07-17 18:07:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:43,307 INFO L93 Difference]: Finished difference Result 645 states and 888 transitions. [2020-07-17 18:07:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:07:43,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-07-17 18:07:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:43,322 INFO L225 Difference]: With dead ends: 645 [2020-07-17 18:07:43,322 INFO L226 Difference]: Without dead ends: 639 [2020-07-17 18:07:43,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:07:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-07-17 18:07:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 572. [2020-07-17 18:07:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-07-17 18:07:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 778 transitions. [2020-07-17 18:07:43,388 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 778 transitions. Word has length 151 [2020-07-17 18:07:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:43,389 INFO L479 AbstractCegarLoop]: Abstraction has 572 states and 778 transitions. [2020-07-17 18:07:43,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:07:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 778 transitions. [2020-07-17 18:07:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-17 18:07:43,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:43,392 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:43,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 18:07:43,392 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash -978309232, now seen corresponding path program 2 times [2020-07-17 18:07:43,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:43,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342427439] [2020-07-17 18:07:43,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-07-17 18:07:43,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342427439] [2020-07-17 18:07:43,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:43,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-17 18:07:43,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105894692] [2020-07-17 18:07:43,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:07:43,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:07:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:07:43,543 INFO L87 Difference]: Start difference. First operand 572 states and 778 transitions. Second operand 11 states. [2020-07-17 18:07:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:44,092 INFO L93 Difference]: Finished difference Result 647 states and 885 transitions. [2020-07-17 18:07:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:07:44,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-07-17 18:07:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:44,100 INFO L225 Difference]: With dead ends: 647 [2020-07-17 18:07:44,100 INFO L226 Difference]: Without dead ends: 641 [2020-07-17 18:07:44,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:07:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-07-17 18:07:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 412. [2020-07-17 18:07:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-17 18:07:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 539 transitions. [2020-07-17 18:07:44,155 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 539 transitions. Word has length 151 [2020-07-17 18:07:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:44,156 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 539 transitions. [2020-07-17 18:07:44,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:07:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 539 transitions. [2020-07-17 18:07:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-17 18:07:44,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:44,160 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:44,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 18:07:44,160 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1688386477, now seen corresponding path program 1 times [2020-07-17 18:07:44,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:44,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852582511] [2020-07-17 18:07:44,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 18:07:44,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852582511] [2020-07-17 18:07:44,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:44,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-17 18:07:44,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277826063] [2020-07-17 18:07:44,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:07:44,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:07:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:07:44,342 INFO L87 Difference]: Start difference. First operand 412 states and 539 transitions. Second operand 13 states. [2020-07-17 18:07:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:44,839 INFO L93 Difference]: Finished difference Result 505 states and 669 transitions. [2020-07-17 18:07:44,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 18:07:44,840 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-07-17 18:07:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:44,845 INFO L225 Difference]: With dead ends: 505 [2020-07-17 18:07:44,846 INFO L226 Difference]: Without dead ends: 495 [2020-07-17 18:07:44,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-07-17 18:07:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-07-17 18:07:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 459. [2020-07-17 18:07:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-07-17 18:07:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 603 transitions. [2020-07-17 18:07:44,903 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 603 transitions. Word has length 161 [2020-07-17 18:07:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:44,904 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 603 transitions. [2020-07-17 18:07:44,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:07:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 603 transitions. [2020-07-17 18:07:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-17 18:07:44,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:44,907 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:44,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 18:07:44,908 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1620079197, now seen corresponding path program 2 times [2020-07-17 18:07:44,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:44,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190399972] [2020-07-17 18:07:44,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-07-17 18:07:45,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190399972] [2020-07-17 18:07:45,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:45,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-17 18:07:45,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786371783] [2020-07-17 18:07:45,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:07:45,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:45,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:07:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:07:45,120 INFO L87 Difference]: Start difference. First operand 459 states and 603 transitions. Second operand 13 states. [2020-07-17 18:07:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:45,587 INFO L93 Difference]: Finished difference Result 499 states and 659 transitions. [2020-07-17 18:07:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 18:07:45,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-07-17 18:07:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:45,589 INFO L225 Difference]: With dead ends: 499 [2020-07-17 18:07:45,589 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 18:07:45,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-07-17 18:07:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 18:07:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 18:07:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 18:07:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 18:07:45,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2020-07-17 18:07:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:45,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 18:07:45,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:07:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 18:07:45,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 18:07:45,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 18:07:45,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 18:07:46,484 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 41 [2020-07-17 18:07:47,170 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 66 [2020-07-17 18:07:47,863 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-07-17 18:07:48,919 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-07-17 18:07:49,605 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 16 [2020-07-17 18:07:50,113 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 26 [2020-07-17 18:07:50,514 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2020-07-17 18:07:50,722 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 16 [2020-07-17 18:07:51,031 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-07-17 18:07:51,509 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 28 [2020-07-17 18:07:51,635 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,635 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,635 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,635 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,636 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,636 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 18:07:51,636 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:07:51,636 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:07:51,636 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 18:07:51,636 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-17 18:07:51,636 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:07:51,636 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,636 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,637 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 56) the Hoare annotation is: true [2020-07-17 18:07:51,637 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (<= (+ main_~limit~0 4) main_~bufsize~0) [2020-07-17 18:07:51,637 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 54) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= 0 main_~i~0) .cse0) (and .cse0 (<= main_~len~0 main_~i~0)))) [2020-07-17 18:07:51,637 INFO L271 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: true [2020-07-17 18:07:51,637 INFO L271 CegarLoopResult]: At program point L23-4(lines 23 54) the Hoare annotation is: true [2020-07-17 18:07:51,637 INFO L271 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: true [2020-07-17 18:07:51,637 INFO L271 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: true [2020-07-17 18:07:51,638 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0)) (.cse1 (<= 0 main_~j~0)) (.cse2 (<= (+ main_~j~0 5) main_~bufsize~0))) (or (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) .cse0 .cse1 .cse2) (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (< main_~i~0 main_~len~0) .cse1 .cse2))) [2020-07-17 18:07:51,638 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,638 INFO L264 CegarLoopResult]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 |main_#t~post6|) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,638 INFO L264 CegarLoopResult]: At program point L40-2(line 40) the Hoare annotation is: (and (<= 2 main_~i~0) (<= 1 |main_#t~post6|) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0)) [2020-07-17 18:07:51,638 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L28-3(line 28) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< main_~i~0 main_~len~0)) [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 53) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= 0 main_~i~0) .cse0 (<= 0 main_~j~0)) (and .cse0 (<= main_~len~0 main_~i~0)))) [2020-07-17 18:07:51,639 INFO L271 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: true [2020-07-17 18:07:51,639 INFO L271 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: true [2020-07-17 18:07:51,639 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0)) (.cse1 (<= (+ main_~j~0 5) main_~bufsize~0))) (or (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) .cse0 .cse1 (<= 0 main_~j~0)) (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (< main_~i~0 main_~len~0) .cse1))) [2020-07-17 18:07:51,639 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 0 |main_#t~post3|) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ |main_#t~post3| 5) main_~bufsize~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L33-1(line 33) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 1 main_~j~0) (<= 0 |main_#t~post3|) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ |main_#t~post3| 5) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,640 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,641 INFO L264 CegarLoopResult]: At program point L25(lines 25 52) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,641 INFO L271 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: true [2020-07-17 18:07:51,641 INFO L271 CegarLoopResult]: At program point L21-1(line 21) the Hoare annotation is: true [2020-07-17 18:07:51,641 INFO L271 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: true [2020-07-17 18:07:51,641 INFO L264 CegarLoopResult]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0)) (.cse1 (<= (+ main_~j~0 5) main_~bufsize~0))) (or (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (< main_~i~0 main_~len~0) .cse1) (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 |main_#t~post8|) (<= 0 main_~i~0) .cse0 (<= 0 main_~j~0) .cse1))) [2020-07-17 18:07:51,641 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-07-17 18:07:51,641 INFO L264 CegarLoopResult]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (< main_~i~0 main_~len~0)) (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 |main_#t~post8|) (<= 0 main_~i~0) (<= 1 main_~j~0) .cse0))) [2020-07-17 18:07:51,641 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,641 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 56) the Hoare annotation is: true [2020-07-17 18:07:51,641 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~i~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ |main_#t~post4| 2) main_~len~0) (<= 0 |main_#t~post4|) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L34-2(line 34) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= (+ |main_#t~post4| 2) main_~len~0) (<= 0 |main_#t~post4|) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,642 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (< (+ main_~i~0 1) main_~len~0) (<= 0 main_~j~0) (<= (+ main_~j~0 5) main_~bufsize~0)) [2020-07-17 18:07:51,642 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-07-17 18:07:51,642 INFO L264 CegarLoopResult]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0)) (.cse1 (< main_~i~0 main_~len~0))) (or (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 .cse1) (and (<= 0 main_~i~0) (<= 1 main_~j~0) .cse0 .cse1))) [2020-07-17 18:07:51,643 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-07-17 18:07:51,643 INFO L264 CegarLoopResult]: At program point L51-1(line 51) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) (<= 1 main_~j~0) (<= 0 |main_#t~post9|) .cse0) (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (<= main_~len~0 (+ |main_#t~post9| 1)) (< main_~i~0 main_~len~0)))) [2020-07-17 18:07:51,643 INFO L264 CegarLoopResult]: At program point L51-2(line 51) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= 1 main_~j~0) (<= 0 |main_#t~post9|) .cse0 (<= 1 main_~i~0)) (and .cse0 (<= main_~len~0 (+ |main_#t~post9| 1)) (<= main_~len~0 main_~i~0)))) [2020-07-17 18:07:51,643 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0)) (.cse1 (<= 0 main_~j~0)) (.cse2 (<= (+ main_~j~0 5) main_~bufsize~0))) (or (and (<= (+ main_~i~0 2) main_~len~0) (<= 0 main_~i~0) .cse0 .cse1 .cse2) (and (<= main_~len~0 (+ main_~i~0 1)) .cse0 (< main_~i~0 main_~len~0) .cse1 .cse2))) [2020-07-17 18:07:51,643 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (and (<= 2 |main_#t~post7|) (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0)) [2020-07-17 18:07:51,643 INFO L264 CegarLoopResult]: At program point L43-1(line 43) the Hoare annotation is: (and (<= 2 |main_#t~post7|) (<= 2 main_~i~0) (<= 3 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-07-17 18:07:51,644 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 |main_#t~post5|) (<= 1 main_~j~0) (<= (+ |main_#t~post5| 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,644 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 |main_#t~post5|) (<= (+ |main_#t~post5| 4) main_~bufsize~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0) (<= (+ main_~j~0 3) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,644 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,644 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~j~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0) (<= 1 main_~i~0)) [2020-07-17 18:07:51,644 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 18:07:51,644 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:07:51,645 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 18:07:51,645 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:07:51,645 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:07:51,645 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 18:07:51,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:07:51 BoogieIcfgContainer [2020-07-17 18:07:51,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:07:51,668 INFO L168 Benchmark]: Toolchain (without parser) took 18278.51 ms. Allocated memory was 137.4 MB in the beginning and 439.4 MB in the end (delta: 302.0 MB). Free memory was 103.0 MB in the beginning and 105.2 MB in the end (delta: -2.3 MB). Peak memory consumption was 320.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,669 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.51 ms. Allocated memory is still 137.4 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,670 INFO L168 Benchmark]: Boogie Preprocessor took 116.51 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 178.8 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,670 INFO L168 Benchmark]: RCFGBuilder took 379.60 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 160.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,671 INFO L168 Benchmark]: TraceAbstraction took 17515.90 ms. Allocated memory was 200.8 MB in the beginning and 439.4 MB in the end (delta: 238.6 MB). Free memory was 159.8 MB in the beginning and 105.2 MB in the end (delta: 54.5 MB). Peak memory consumption was 313.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:51,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.51 ms. Allocated memory is still 137.4 MB. Free memory was 102.8 MB in the beginning and 92.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.51 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 92.6 MB in the beginning and 178.8 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.60 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 160.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17515.90 ms. Allocated memory was 200.8 MB in the beginning and 439.4 MB in the end (delta: 238.6 MB). Free memory was 159.8 MB in the beginning and 105.2 MB in the end (delta: 54.5 MB). Peak memory consumption was 313.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((0 <= i && limit + 4 <= bufsize) && 0 <= j) && i < len) && j + 5 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (0 <= i && limit + 4 <= bufsize) || (limit + 4 <= bufsize && len <= i) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((0 <= i && limit + 4 <= bufsize) && 0 <= j) || (limit + 4 <= bufsize && len <= i) - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 23, TraceHistogramMax: 22, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2525 SDtfs, 852 SDslu, 11733 SDs, 0 SdLazy, 3758 SolverSat, 478 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=572occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 542 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 74 LocationsWithAnnotation, 1484 PreInvPairs, 2305 NumberOfFragments, 1190 HoareAnnotationTreeSize, 1484 FomulaSimplifications, 3249041 FormulaSimplificationTreeSizeReduction, 1.9s HoareSimplificationTime, 74 FomulaSimplificationsInter, 745853 FormulaSimplificationTreeSizeReductionInter, 4.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 2033 ConstructedInterpolants, 0 QuantifiedInterpolants, 394477 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 6694/6694 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...