/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-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:14:49,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:14:49,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:14:49,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:14:49,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:14:49,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:14:49,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:14:49,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:14:49,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:14:49,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:14:49,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:14:49,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:14:49,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:14:49,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:14:49,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:14:49,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:14:49,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:14:49,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:14:49,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:14:49,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:14:49,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:14:49,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:14:49,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:14:49,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:14:49,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:14:49,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:14:49,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:14:49,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:14:49,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:14:49,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:14:49,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:14:49,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:14:49,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:14:49,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:14:49,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:14:49,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:14:49,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:14:49,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:14:49,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:14:49,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:14:49,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:14:49,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:14:49,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:14:49,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:14:49,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:14:49,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:14:49,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:14:49,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:14:49,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:14:49,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:14:49,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:14:49,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:14:49,206 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:14:49,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:14:49,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:14:49,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:14:49,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:14:49,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:14:49,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:14:49,207 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:14:49,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:14:49,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:14:49,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:14:49,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:14:49,662 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:14:49,663 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-04 23:14:49,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e9aa9f3/0e9af314faa948078bea49330eab1345/FLAGcc51cd89f [2020-09-04 23:14:50,319 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:14:50,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-04 23:14:50,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e9aa9f3/0e9af314faa948078bea49330eab1345/FLAGcc51cd89f [2020-09-04 23:14:50,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e9aa9f3/0e9af314faa948078bea49330eab1345 [2020-09-04 23:14:50,623 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:14:50,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:14:50,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:50,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:14:50,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:14:50,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756d08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50, skipping insertion in model container [2020-09-04 23:14:50,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:14:50,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:14:50,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:50,875 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:14:50,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:14:50,907 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:14:50,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50 WrapperNode [2020-09-04 23:14:50,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:14:50,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:14:50,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:14:50,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:14:50,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:50,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... [2020-09-04 23:14:51,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:14:51,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:14:51,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:14:51,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:14:51,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:14:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:14:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:14:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:14:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:14:51,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:14:51,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:14:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:14:51,333 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:14:51,334 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:14:51,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:51 BoogieIcfgContainer [2020-09-04 23:14:51,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:14:51,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:14:51,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:14:51,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:14:51,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:14:50" (1/3) ... [2020-09-04 23:14:51,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164263f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:51, skipping insertion in model container [2020-09-04 23:14:51,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:14:50" (2/3) ... [2020-09-04 23:14:51,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164263f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:14:51, skipping insertion in model container [2020-09-04 23:14:51,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:14:51" (3/3) ... [2020-09-04 23:14:51,351 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-04 23:14:51,366 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:14:51,380 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:14:51,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:14:51,446 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:14:51,447 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:14:51,447 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:14:51,447 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:14:51,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:14:51,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:14:51,453 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:14:51,453 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:14:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-04 23:14:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-04 23:14:51,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:51,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:51,498 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:51,507 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-04 23:14:51,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:51,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061787698] [2020-09-04 23:14:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:51,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:51,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061787698] [2020-09-04 23:14:51,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:51,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:14:51,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110150609] [2020-09-04 23:14:51,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:14:51,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:51,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:14:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:14:51,686 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-04 23:14:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:51,719 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-04 23:14:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:14:51,721 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-04 23:14:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:51,739 INFO L225 Difference]: With dead ends: 41 [2020-09-04 23:14:51,740 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 23:14:51,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:14:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 23:14:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 23:14:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 23:14:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-04 23:14:51,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-04 23:14:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:51,815 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-04 23:14:51,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:14:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-04 23:14:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:14:51,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:51,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:51,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:14:51,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-04 23:14:51,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:51,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780891657] [2020-09-04 23:14:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:51,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:51,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780891657] [2020-09-04 23:14:51,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:51,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:14:51,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403134063] [2020-09-04 23:14:51,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:14:51,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:14:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:14:51,959 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-04 23:14:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,040 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-04 23:14:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:14:52,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-04 23:14:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,045 INFO L225 Difference]: With dead ends: 50 [2020-09-04 23:14:52,045 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 23:14:52,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:14:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 23:14:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-04 23:14:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 23:14:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 23:14:52,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-04 23:14:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,057 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 23:14:52,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:14:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 23:14:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 23:14:52,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:52,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:14:52,060 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-04 23:14:52,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252765045] [2020-09-04 23:14:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:52,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252765045] [2020-09-04 23:14:52,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:14:52,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 23:14:52,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156856175] [2020-09-04 23:14:52,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:14:52,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:14:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:14:52,194 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-04 23:14:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,266 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-04 23:14:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:14:52,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-04 23:14:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,268 INFO L225 Difference]: With dead ends: 38 [2020-09-04 23:14:52,268 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 23:14:52,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:14:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 23:14:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-04 23:14:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 23:14:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-04 23:14:52,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-04 23:14:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,280 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-04 23:14:52,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:14:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-04 23:14:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:14:52,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,281 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] [2020-09-04 23:14:52,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:14:52,282 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-04 23:14:52,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071519080] [2020-09-04 23:14:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:52,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071519080] [2020-09-04 23:14:52,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:52,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 23:14:52,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948837339] [2020-09-04 23:14:52,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:14:52,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:14:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:14:52,360 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-04 23:14:52,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,439 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-04 23:14:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:14:52,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 23:14:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,441 INFO L225 Difference]: With dead ends: 59 [2020-09-04 23:14:52,441 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:14:52,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:14:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:14:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-04 23:14:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 23:14:52,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-04 23:14:52,452 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-04 23:14:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,452 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-04 23:14:52,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:14:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-04 23:14:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 23:14:52,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:52,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:14:52,454 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-04 23:14:52,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862932875] [2020-09-04 23:14:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:52,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862932875] [2020-09-04 23:14:52,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:52,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:14:52,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166959729] [2020-09-04 23:14:52,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:14:52,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:14:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:14:52,609 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-04 23:14:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,697 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 23:14:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:14:52,698 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-04 23:14:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,699 INFO L225 Difference]: With dead ends: 46 [2020-09-04 23:14:52,700 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 23:14:52,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 23:14:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-04 23:14:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 23:14:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-04 23:14:52,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-04 23:14:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,712 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-04 23:14:52,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:14:52,713 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-04 23:14:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:14:52,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,714 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:52,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:14:52,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-04 23:14:52,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203181850] [2020-09-04 23:14:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:52,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203181850] [2020-09-04 23:14:52,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:52,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:14:52,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978364278] [2020-09-04 23:14:52,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:14:52,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:52,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:14:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:14:52,828 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-04 23:14:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:52,961 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-04 23:14:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:14:52,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-04 23:14:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:52,963 INFO L225 Difference]: With dead ends: 68 [2020-09-04 23:14:52,963 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 23:14:52,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 23:14:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-04 23:14:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:14:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 23:14:52,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-04 23:14:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:52,991 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 23:14:52,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:14:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 23:14:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 23:14:52,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:52,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:52,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:14:52,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-04 23:14:52,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810718028] [2020-09-04 23:14:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:53,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810718028] [2020-09-04 23:14:53,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:53,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:14:53,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212253781] [2020-09-04 23:14:53,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:14:53,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:14:53,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:14:53,135 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-04 23:14:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:53,225 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-04 23:14:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:14:53,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-04 23:14:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:53,226 INFO L225 Difference]: With dead ends: 55 [2020-09-04 23:14:53,227 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 23:14:53,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:14:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 23:14:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-04 23:14:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 23:14:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-04 23:14:53,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-04 23:14:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:53,238 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-04 23:14:53,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:14:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-04 23:14:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 23:14:53,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:53,240 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:53,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:14:53,240 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-04 23:14:53,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:53,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845835007] [2020-09-04 23:14:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:53,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845835007] [2020-09-04 23:14:53,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:53,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:14:53,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666871915] [2020-09-04 23:14:53,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:14:53,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:53,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:14:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:14:53,310 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-04 23:14:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:53,391 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-04 23:14:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:14:53,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-04 23:14:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:53,393 INFO L225 Difference]: With dead ends: 77 [2020-09-04 23:14:53,393 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 23:14:53,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:14:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 23:14:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-04 23:14:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 23:14:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-04 23:14:53,404 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-04 23:14:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:53,405 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-04 23:14:53,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:14:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-04 23:14:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 23:14:53,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:53,407 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:53,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:14:53,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-04 23:14:53,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:53,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749436801] [2020-09-04 23:14:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:53,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749436801] [2020-09-04 23:14:53,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:53,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:14:53,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831705498] [2020-09-04 23:14:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:14:53,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:14:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:14:53,564 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-04 23:14:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:53,714 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-04 23:14:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:14:53,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-04 23:14:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:53,716 INFO L225 Difference]: With dead ends: 64 [2020-09-04 23:14:53,717 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 23:14:53,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:14:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 23:14:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-04 23:14:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 23:14:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 23:14:53,729 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-04 23:14:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:53,729 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 23:14:53,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:14:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 23:14:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 23:14:53,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:53,731 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:53,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:14:53,732 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-04 23:14:53,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:53,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909030015] [2020-09-04 23:14:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:53,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909030015] [2020-09-04 23:14:53,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:53,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:14:53,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739805538] [2020-09-04 23:14:53,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:14:53,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:14:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:14:53,858 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-04 23:14:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:53,987 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-04 23:14:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:14:53,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-04 23:14:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:53,988 INFO L225 Difference]: With dead ends: 86 [2020-09-04 23:14:53,989 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 23:14:53,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:14:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 23:14:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-04 23:14:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 23:14:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-04 23:14:54,006 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-04 23:14:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:54,006 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-04 23:14:54,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:14:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-04 23:14:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 23:14:54,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:54,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:54,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:14:54,013 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-04 23:14:54,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:54,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482188390] [2020-09-04 23:14:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:54,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482188390] [2020-09-04 23:14:54,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:54,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:14:54,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545667124] [2020-09-04 23:14:54,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:14:54,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:14:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:14:54,196 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-09-04 23:14:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:54,410 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-04 23:14:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:14:54,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-09-04 23:14:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:54,412 INFO L225 Difference]: With dead ends: 73 [2020-09-04 23:14:54,413 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 23:14:54,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:14:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 23:14:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-04 23:14:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 23:14:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-04 23:14:54,430 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-04 23:14:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:54,430 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-04 23:14:54,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:14:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-04 23:14:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 23:14:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:54,435 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:54,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:14:54,436 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-04 23:14:54,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:54,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577017477] [2020-09-04 23:14:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:54,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577017477] [2020-09-04 23:14:54,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:54,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:14:54,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233720435] [2020-09-04 23:14:54,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:14:54,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:14:54,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:14:54,590 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-04 23:14:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:54,712 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-04 23:14:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:14:54,713 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-04 23:14:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:54,714 INFO L225 Difference]: With dead ends: 95 [2020-09-04 23:14:54,714 INFO L226 Difference]: Without dead ends: 79 [2020-09-04 23:14:54,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:14:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-04 23:14:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-04 23:14:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 23:14:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-04 23:14:54,727 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-04 23:14:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:54,728 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-04 23:14:54,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:14:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-04 23:14:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-04 23:14:54,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:54,729 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:54,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:14:54,730 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-04 23:14:54,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:54,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298451238] [2020-09-04 23:14:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:54,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298451238] [2020-09-04 23:14:54,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:54,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:14:54,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710016562] [2020-09-04 23:14:54,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:14:54,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:54,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:14:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:14:54,928 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-04 23:14:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:55,195 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-04 23:14:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:14:55,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-04 23:14:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:55,197 INFO L225 Difference]: With dead ends: 82 [2020-09-04 23:14:55,197 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 23:14:55,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 23:14:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-04 23:14:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 23:14:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-04 23:14:55,209 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-04 23:14:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:55,210 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-04 23:14:55,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:14:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-04 23:14:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 23:14:55,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:55,211 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:55,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:14:55,212 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:55,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-04 23:14:55,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:55,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115620857] [2020-09-04 23:14:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:55,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:55,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115620857] [2020-09-04 23:14:55,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:55,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:14:55,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022553683] [2020-09-04 23:14:55,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:14:55,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:14:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:14:55,318 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-04 23:14:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:55,469 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-04 23:14:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:14:55,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-04 23:14:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:55,471 INFO L225 Difference]: With dead ends: 104 [2020-09-04 23:14:55,471 INFO L226 Difference]: Without dead ends: 88 [2020-09-04 23:14:55,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:14:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-04 23:14:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-04 23:14:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 23:14:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-04 23:14:55,486 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-04 23:14:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:55,486 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-04 23:14:55,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:14:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-04 23:14:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 23:14:55,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:55,488 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:55,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:14:55,488 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-04 23:14:55,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:55,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213792417] [2020-09-04 23:14:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:55,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:55,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213792417] [2020-09-04 23:14:55,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:55,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:14:55,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990856831] [2020-09-04 23:14:55,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:14:55,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:14:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:14:55,720 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-04 23:14:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:56,036 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-04 23:14:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 23:14:56,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-04 23:14:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:56,038 INFO L225 Difference]: With dead ends: 91 [2020-09-04 23:14:56,038 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 23:14:56,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:14:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 23:14:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-04 23:14:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-04 23:14:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-04 23:14:56,057 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-04 23:14:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:56,057 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-04 23:14:56,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:14:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-04 23:14:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-04 23:14:56,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:56,058 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:56,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:14:56,059 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:56,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-04 23:14:56,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:56,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370831939] [2020-09-04 23:14:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:56,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:56,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370831939] [2020-09-04 23:14:56,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:56,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:14:56,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479591652] [2020-09-04 23:14:56,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:14:56,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:14:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:14:56,181 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-04 23:14:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:56,336 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-04 23:14:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:14:56,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-04 23:14:56,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:56,339 INFO L225 Difference]: With dead ends: 113 [2020-09-04 23:14:56,339 INFO L226 Difference]: Without dead ends: 97 [2020-09-04 23:14:56,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:14:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-04 23:14:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-04 23:14:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 23:14:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-04 23:14:56,353 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-04 23:14:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:56,354 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-04 23:14:56,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:14:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-04 23:14:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 23:14:56,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:56,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:56,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:14:56,356 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-04 23:14:56,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:56,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491361604] [2020-09-04 23:14:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:56,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:56,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491361604] [2020-09-04 23:14:56,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:56,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:14:56,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679252845] [2020-09-04 23:14:56,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:14:56,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:56,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:14:56,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:14:56,640 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-09-04 23:14:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:57,070 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-09-04 23:14:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:14:57,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-09-04 23:14:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:57,071 INFO L225 Difference]: With dead ends: 100 [2020-09-04 23:14:57,071 INFO L226 Difference]: Without dead ends: 93 [2020-09-04 23:14:57,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:14:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-04 23:14:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-09-04 23:14:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 23:14:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-09-04 23:14:57,086 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-09-04 23:14:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:57,087 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-09-04 23:14:57,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:14:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-09-04 23:14:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 23:14:57,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:57,088 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:57,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:14:57,088 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-09-04 23:14:57,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:57,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892728709] [2020-09-04 23:14:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:57,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:57,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892728709] [2020-09-04 23:14:57,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:57,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:14:57,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386268101] [2020-09-04 23:14:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:14:57,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:14:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:14:57,210 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-09-04 23:14:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:57,382 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-09-04 23:14:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:14:57,382 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-09-04 23:14:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:57,384 INFO L225 Difference]: With dead ends: 122 [2020-09-04 23:14:57,384 INFO L226 Difference]: Without dead ends: 106 [2020-09-04 23:14:57,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:14:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-04 23:14:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-09-04 23:14:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 23:14:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-09-04 23:14:57,398 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-09-04 23:14:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:57,398 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-09-04 23:14:57,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:14:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-09-04 23:14:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 23:14:57,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:57,399 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:57,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:14:57,400 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:57,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-09-04 23:14:57,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:57,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907134220] [2020-09-04 23:14:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:57,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:57,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907134220] [2020-09-04 23:14:57,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:57,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-04 23:14:57,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987160274] [2020-09-04 23:14:57,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 23:14:57,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 23:14:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:14:57,706 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-09-04 23:14:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:58,183 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-09-04 23:14:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:14:58,184 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-09-04 23:14:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:58,185 INFO L225 Difference]: With dead ends: 109 [2020-09-04 23:14:58,185 INFO L226 Difference]: Without dead ends: 102 [2020-09-04 23:14:58,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:14:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-04 23:14:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-09-04 23:14:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 23:14:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-09-04 23:14:58,200 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-09-04 23:14:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:58,200 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-09-04 23:14:58,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 23:14:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-09-04 23:14:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 23:14:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:58,202 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:58,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:14:58,202 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-09-04 23:14:58,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:58,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060363022] [2020-09-04 23:14:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:58,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060363022] [2020-09-04 23:14:58,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:58,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:14:58,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275715085] [2020-09-04 23:14:58,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:14:58,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:14:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:14:58,339 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-09-04 23:14:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:58,538 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-09-04 23:14:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:14:58,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-09-04 23:14:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:58,540 INFO L225 Difference]: With dead ends: 131 [2020-09-04 23:14:58,540 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 23:14:58,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 23:14:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-09-04 23:14:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-04 23:14:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-09-04 23:14:58,555 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-09-04 23:14:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:58,555 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-09-04 23:14:58,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:14:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-09-04 23:14:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-04 23:14:58,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:58,557 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:58,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:14:58,557 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:58,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-09-04 23:14:58,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:58,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805978476] [2020-09-04 23:14:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:58,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805978476] [2020-09-04 23:14:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:58,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 23:14:58,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63719990] [2020-09-04 23:14:58,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 23:14:58,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:58,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 23:14:58,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:14:58,983 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-09-04 23:14:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:59,676 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-09-04 23:14:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 23:14:59,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-09-04 23:14:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:59,679 INFO L225 Difference]: With dead ends: 118 [2020-09-04 23:14:59,679 INFO L226 Difference]: Without dead ends: 111 [2020-09-04 23:14:59,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:14:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-04 23:14:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-09-04 23:14:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-04 23:14:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-09-04 23:14:59,702 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-09-04 23:14:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:59,703 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-09-04 23:14:59,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 23:14:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-09-04 23:14:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-04 23:14:59,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:59,706 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:59,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:14:59,706 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-09-04 23:14:59,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:59,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281694509] [2020-09-04 23:14:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:59,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281694509] [2020-09-04 23:14:59,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:59,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:14:59,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689334410] [2020-09-04 23:14:59,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:14:59,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:59,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:14:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:14:59,910 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-09-04 23:15:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:00,146 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-09-04 23:15:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:15:00,148 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-09-04 23:15:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:00,149 INFO L225 Difference]: With dead ends: 140 [2020-09-04 23:15:00,149 INFO L226 Difference]: Without dead ends: 124 [2020-09-04 23:15:00,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:15:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-04 23:15:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-09-04 23:15:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 23:15:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-04 23:15:00,169 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-09-04 23:15:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:00,170 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-04 23:15:00,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:15:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-04 23:15:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 23:15:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:00,172 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:00,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:15:00,173 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-09-04 23:15:00,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:00,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49216353] [2020-09-04 23:15:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:00,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:00,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49216353] [2020-09-04 23:15:00,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:00,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 23:15:00,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261122990] [2020-09-04 23:15:00,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 23:15:00,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 23:15:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:15:00,640 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-09-04 23:15:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:01,382 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-09-04 23:15:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:15:01,383 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-09-04 23:15:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:01,384 INFO L225 Difference]: With dead ends: 127 [2020-09-04 23:15:01,384 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 23:15:01,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:15:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 23:15:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-04 23:15:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 23:15:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-09-04 23:15:01,402 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-09-04 23:15:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:01,403 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-09-04 23:15:01,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 23:15:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-09-04 23:15:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 23:15:01,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:01,404 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:01,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:15:01,405 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-09-04 23:15:01,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:01,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647894899] [2020-09-04 23:15:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:01,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647894899] [2020-09-04 23:15:01,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:01,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:15:01,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803724315] [2020-09-04 23:15:01,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:15:01,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:15:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:15:01,596 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-09-04 23:15:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:01,867 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-09-04 23:15:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:15:01,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-09-04 23:15:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:01,869 INFO L225 Difference]: With dead ends: 149 [2020-09-04 23:15:01,869 INFO L226 Difference]: Without dead ends: 133 [2020-09-04 23:15:01,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:15:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-04 23:15:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-09-04 23:15:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-04 23:15:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-09-04 23:15:01,888 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-09-04 23:15:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:01,889 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-09-04 23:15:01,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:15:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-09-04 23:15:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 23:15:01,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:01,890 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:01,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:15:01,892 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-09-04 23:15:01,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:01,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123553677] [2020-09-04 23:15:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:02,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123553677] [2020-09-04 23:15:02,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:02,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 23:15:02,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503771269] [2020-09-04 23:15:02,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 23:15:02,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 23:15:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:15:02,476 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-09-04 23:15:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:03,289 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-09-04 23:15:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:15:03,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-09-04 23:15:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:03,291 INFO L225 Difference]: With dead ends: 136 [2020-09-04 23:15:03,291 INFO L226 Difference]: Without dead ends: 129 [2020-09-04 23:15:03,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:15:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-04 23:15:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-09-04 23:15:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-04 23:15:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-09-04 23:15:03,310 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 116 [2020-09-04 23:15:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:03,310 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-09-04 23:15:03,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 23:15:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-09-04 23:15:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-04 23:15:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:03,312 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:03,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:15:03,312 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1865460800, now seen corresponding path program 12 times [2020-09-04 23:15:03,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:03,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60692831] [2020-09-04 23:15:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 12 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:03,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60692831] [2020-09-04 23:15:03,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:03,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:15:03,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318997650] [2020-09-04 23:15:03,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:15:03,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:15:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:15:03,513 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 16 states. [2020-09-04 23:15:03,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:03,850 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-09-04 23:15:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:15:03,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-09-04 23:15:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:03,852 INFO L225 Difference]: With dead ends: 158 [2020-09-04 23:15:03,852 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 23:15:03,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:15:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 23:15:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-09-04 23:15:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 23:15:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-09-04 23:15:03,872 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 123 [2020-09-04 23:15:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:03,873 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-09-04 23:15:03,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:15:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-09-04 23:15:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-04 23:15:03,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:03,874 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:03,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:15:03,875 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash 328124995, now seen corresponding path program 12 times [2020-09-04 23:15:03,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:03,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690652717] [2020-09-04 23:15:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690652717] [2020-09-04 23:15:04,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:04,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 23:15:04,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145522] [2020-09-04 23:15:04,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 23:15:04,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 23:15:04,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:15:04,410 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-09-04 23:15:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:05,425 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-09-04 23:15:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 23:15:05,425 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-09-04 23:15:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:05,428 INFO L225 Difference]: With dead ends: 145 [2020-09-04 23:15:05,428 INFO L226 Difference]: Without dead ends: 138 [2020-09-04 23:15:05,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:15:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-04 23:15:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-09-04 23:15:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-04 23:15:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-09-04 23:15:05,448 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 125 [2020-09-04 23:15:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:05,449 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-09-04 23:15:05,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 23:15:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-09-04 23:15:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-04 23:15:05,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:05,450 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:05,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:15:05,451 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2136494762, now seen corresponding path program 13 times [2020-09-04 23:15:05,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:05,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175054104] [2020-09-04 23:15:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:05,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 13 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:05,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175054104] [2020-09-04 23:15:05,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:05,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:15:05,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081944538] [2020-09-04 23:15:05,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:15:05,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:15:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:15:05,707 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 17 states. [2020-09-04 23:15:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:06,078 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-09-04 23:15:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:15:06,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2020-09-04 23:15:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:06,080 INFO L225 Difference]: With dead ends: 167 [2020-09-04 23:15:06,080 INFO L226 Difference]: Without dead ends: 151 [2020-09-04 23:15:06,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:15:06,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-04 23:15:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-09-04 23:15:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 23:15:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-09-04 23:15:06,102 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2020-09-04 23:15:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:06,103 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-09-04 23:15:06,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:15:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-09-04 23:15:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-04 23:15:06,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:06,104 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:06,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:15:06,104 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1555440167, now seen corresponding path program 13 times [2020-09-04 23:15:06,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:06,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308833075] [2020-09-04 23:15:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:06,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308833075] [2020-09-04 23:15:06,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:06,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-04 23:15:06,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274717750] [2020-09-04 23:15:06,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 23:15:06,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 23:15:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:15:06,796 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 31 states. [2020-09-04 23:15:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:07,964 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2020-09-04 23:15:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:15:07,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-09-04 23:15:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:07,967 INFO L225 Difference]: With dead ends: 154 [2020-09-04 23:15:07,967 INFO L226 Difference]: Without dead ends: 147 [2020-09-04 23:15:07,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:15:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-04 23:15:07,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-09-04 23:15:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 23:15:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-04 23:15:07,988 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2020-09-04 23:15:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:07,988 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-04 23:15:07,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 23:15:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-04 23:15:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-04 23:15:07,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:07,990 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:07,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:15:07,990 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:07,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1825670400, now seen corresponding path program 14 times [2020-09-04 23:15:07,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:07,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020564420] [2020-09-04 23:15:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:08,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020564420] [2020-09-04 23:15:08,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:08,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:15:08,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814451024] [2020-09-04 23:15:08,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:15:08,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:15:08,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:15:08,263 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 18 states. [2020-09-04 23:15:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:08,683 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2020-09-04 23:15:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 23:15:08,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-09-04 23:15:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:08,685 INFO L225 Difference]: With dead ends: 176 [2020-09-04 23:15:08,685 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 23:15:08,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:15:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 23:15:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2020-09-04 23:15:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 23:15:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-09-04 23:15:08,706 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 141 [2020-09-04 23:15:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:08,707 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-09-04 23:15:08,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:15:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-09-04 23:15:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-04 23:15:08,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:08,708 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:08,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:15:08,708 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash 744256259, now seen corresponding path program 14 times [2020-09-04 23:15:08,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:08,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272002103] [2020-09-04 23:15:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:09,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:09,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272002103] [2020-09-04 23:15:09,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:09,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 23:15:09,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245218502] [2020-09-04 23:15:09,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 23:15:09,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 23:15:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:15:09,474 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2020-09-04 23:15:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:10,756 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2020-09-04 23:15:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 23:15:10,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-09-04 23:15:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:10,758 INFO L225 Difference]: With dead ends: 163 [2020-09-04 23:15:10,758 INFO L226 Difference]: Without dead ends: 156 [2020-09-04 23:15:10,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 23:15:10,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-04 23:15:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-09-04 23:15:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-04 23:15:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-09-04 23:15:10,780 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 143 [2020-09-04 23:15:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:10,781 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-09-04 23:15:10,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 23:15:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-09-04 23:15:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-04 23:15:10,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:10,782 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:10,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:15:10,783 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:10,783 INFO L82 PathProgramCache]: Analyzing trace with hash 93236374, now seen corresponding path program 15 times [2020-09-04 23:15:10,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:10,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206348616] [2020-09-04 23:15:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:11,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 15 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:11,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206348616] [2020-09-04 23:15:11,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:11,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:15:11,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514101812] [2020-09-04 23:15:11,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:15:11,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:15:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:15:11,049 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 19 states. [2020-09-04 23:15:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:11,505 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-09-04 23:15:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:15:11,506 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 150 [2020-09-04 23:15:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:11,508 INFO L225 Difference]: With dead ends: 185 [2020-09-04 23:15:11,509 INFO L226 Difference]: Without dead ends: 169 [2020-09-04 23:15:11,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:15:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-04 23:15:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-09-04 23:15:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-04 23:15:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-09-04 23:15:11,539 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 150 [2020-09-04 23:15:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:11,541 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-09-04 23:15:11,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:15:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-09-04 23:15:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-04 23:15:11,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:11,543 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:11,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:15:11,543 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:11,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1972499175, now seen corresponding path program 15 times [2020-09-04 23:15:11,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:11,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833150764] [2020-09-04 23:15:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:12,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:12,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833150764] [2020-09-04 23:15:12,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:12,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-04 23:15:12,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39051487] [2020-09-04 23:15:12,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 23:15:12,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 23:15:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:15:12,444 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2020-09-04 23:15:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:13,899 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-09-04 23:15:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 23:15:13,899 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-09-04 23:15:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:13,901 INFO L225 Difference]: With dead ends: 172 [2020-09-04 23:15:13,901 INFO L226 Difference]: Without dead ends: 165 [2020-09-04 23:15:13,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=3684, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:15:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-04 23:15:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-09-04 23:15:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 23:15:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-09-04 23:15:13,939 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 152 [2020-09-04 23:15:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:13,940 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-09-04 23:15:13,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 23:15:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-09-04 23:15:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-04 23:15:13,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:13,941 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:13,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:15:13,941 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1152757184, now seen corresponding path program 16 times [2020-09-04 23:15:13,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:13,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810769447] [2020-09-04 23:15:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 16 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:14,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810769447] [2020-09-04 23:15:14,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:14,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:15:14,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559854164] [2020-09-04 23:15:14,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:15:14,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:15:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:15:14,261 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 20 states. [2020-09-04 23:15:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:14,749 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-09-04 23:15:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:15:14,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-09-04 23:15:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:14,751 INFO L225 Difference]: With dead ends: 194 [2020-09-04 23:15:14,751 INFO L226 Difference]: Without dead ends: 178 [2020-09-04 23:15:14,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:15:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-04 23:15:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-09-04 23:15:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 23:15:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-09-04 23:15:14,781 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 159 [2020-09-04 23:15:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:14,781 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-09-04 23:15:14,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:15:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-09-04 23:15:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-04 23:15:14,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:14,783 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:14,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:15:14,783 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1680249917, now seen corresponding path program 16 times [2020-09-04 23:15:14,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:14,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543120331] [2020-09-04 23:15:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:15,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543120331] [2020-09-04 23:15:15,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:15,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-04 23:15:15,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861137686] [2020-09-04 23:15:15,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 23:15:15,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 23:15:15,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:15:15,733 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 37 states. [2020-09-04 23:15:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:17,388 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-09-04 23:15:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:15:17,389 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-09-04 23:15:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:17,390 INFO L225 Difference]: With dead ends: 181 [2020-09-04 23:15:17,391 INFO L226 Difference]: Without dead ends: 174 [2020-09-04 23:15:17,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=237, Invalid=4185, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:15:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-04 23:15:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-09-04 23:15:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-04 23:15:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-09-04 23:15:17,416 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 161 [2020-09-04 23:15:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:17,417 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-09-04 23:15:17,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 23:15:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-09-04 23:15:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-04 23:15:17,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:17,418 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:17,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:15:17,419 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:17,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2129419222, now seen corresponding path program 17 times [2020-09-04 23:15:17,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:17,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339710207] [2020-09-04 23:15:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:17,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 17 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:17,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339710207] [2020-09-04 23:15:17,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:17,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-04 23:15:17,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104671718] [2020-09-04 23:15:17,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 23:15:17,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 23:15:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:15:17,778 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 21 states. [2020-09-04 23:15:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:18,307 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-09-04 23:15:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 23:15:18,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-09-04 23:15:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:18,309 INFO L225 Difference]: With dead ends: 203 [2020-09-04 23:15:18,309 INFO L226 Difference]: Without dead ends: 187 [2020-09-04 23:15:18,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:15:18,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-04 23:15:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-09-04 23:15:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 23:15:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-09-04 23:15:18,337 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 168 [2020-09-04 23:15:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:18,338 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-09-04 23:15:18,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 23:15:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-09-04 23:15:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-04 23:15:18,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:18,339 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:18,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:15:18,339 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:18,340 INFO L82 PathProgramCache]: Analyzing trace with hash 589098073, now seen corresponding path program 17 times [2020-09-04 23:15:18,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:18,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063240764] [2020-09-04 23:15:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:19,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063240764] [2020-09-04 23:15:19,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:19,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-04 23:15:19,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530524036] [2020-09-04 23:15:19,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 23:15:19,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:19,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 23:15:19,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:15:19,378 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 39 states. [2020-09-04 23:15:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:21,138 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2020-09-04 23:15:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 23:15:21,138 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-09-04 23:15:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:21,141 INFO L225 Difference]: With dead ends: 190 [2020-09-04 23:15:21,141 INFO L226 Difference]: Without dead ends: 183 [2020-09-04 23:15:21,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:15:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-04 23:15:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-09-04 23:15:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-04 23:15:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-09-04 23:15:21,174 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 170 [2020-09-04 23:15:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:21,174 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-09-04 23:15:21,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 23:15:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-09-04 23:15:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-04 23:15:21,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:21,175 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:21,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:15:21,176 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:21,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1252599424, now seen corresponding path program 18 times [2020-09-04 23:15:21,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:21,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216700722] [2020-09-04 23:15:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:21,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 18 proven. 1413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:21,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216700722] [2020-09-04 23:15:21,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:21,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:15:21,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780666800] [2020-09-04 23:15:21,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:15:21,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:15:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:15:21,560 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 22 states. [2020-09-04 23:15:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:22,087 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2020-09-04 23:15:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:15:22,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-09-04 23:15:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:22,089 INFO L225 Difference]: With dead ends: 212 [2020-09-04 23:15:22,089 INFO L226 Difference]: Without dead ends: 196 [2020-09-04 23:15:22,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:15:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-04 23:15:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-09-04 23:15:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 23:15:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-09-04 23:15:22,120 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2020-09-04 23:15:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:22,121 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-09-04 23:15:22,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:15:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-09-04 23:15:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-04 23:15:22,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:22,122 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:22,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:15:22,122 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash -221137789, now seen corresponding path program 18 times [2020-09-04 23:15:22,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:22,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139305416] [2020-09-04 23:15:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:23,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139305416] [2020-09-04 23:15:23,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:23,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 23:15:23,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488770173] [2020-09-04 23:15:23,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 23:15:23,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 23:15:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:15:23,295 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 41 states. [2020-09-04 23:15:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:25,259 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2020-09-04 23:15:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 23:15:25,260 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2020-09-04 23:15:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:25,262 INFO L225 Difference]: With dead ends: 199 [2020-09-04 23:15:25,262 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 23:15:25,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=267, Invalid=5283, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:15:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 23:15:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-09-04 23:15:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-09-04 23:15:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-09-04 23:15:25,300 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 179 [2020-09-04 23:15:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:25,300 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-09-04 23:15:25,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 23:15:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-09-04 23:15:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 23:15:25,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:25,301 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:25,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:15:25,302 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 510966550, now seen corresponding path program 19 times [2020-09-04 23:15:25,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:25,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414153339] [2020-09-04 23:15:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 19 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:25,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414153339] [2020-09-04 23:15:25,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:25,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 23:15:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013374245] [2020-09-04 23:15:25,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 23:15:25,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 23:15:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:15:25,710 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 23 states. [2020-09-04 23:15:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:26,299 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-09-04 23:15:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:15:26,300 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2020-09-04 23:15:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:26,301 INFO L225 Difference]: With dead ends: 221 [2020-09-04 23:15:26,301 INFO L226 Difference]: Without dead ends: 205 [2020-09-04 23:15:26,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:15:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-04 23:15:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2020-09-04 23:15:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-04 23:15:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-09-04 23:15:26,336 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 186 [2020-09-04 23:15:26,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:26,337 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-09-04 23:15:26,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 23:15:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-09-04 23:15:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-04 23:15:26,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:26,338 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:26,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:15:26,339 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 34241433, now seen corresponding path program 19 times [2020-09-04 23:15:26,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:26,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355001321] [2020-09-04 23:15:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:27,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355001321] [2020-09-04 23:15:27,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:27,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-04 23:15:27,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516099142] [2020-09-04 23:15:27,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 23:15:27,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:27,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 23:15:27,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:15:27,499 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 43 states. [2020-09-04 23:15:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:29,748 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-09-04 23:15:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:15:29,749 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 188 [2020-09-04 23:15:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:29,751 INFO L225 Difference]: With dead ends: 208 [2020-09-04 23:15:29,751 INFO L226 Difference]: Without dead ends: 201 [2020-09-04 23:15:29,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=5880, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:15:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-04 23:15:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-09-04 23:15:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-04 23:15:29,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-09-04 23:15:29,790 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 188 [2020-09-04 23:15:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:29,790 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-09-04 23:15:29,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 23:15:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-09-04 23:15:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-04 23:15:29,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:29,793 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:29,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:15:29,793 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -143134912, now seen corresponding path program 20 times [2020-09-04 23:15:29,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:29,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936669702] [2020-09-04 23:15:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 20 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:30,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936669702] [2020-09-04 23:15:30,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:30,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:15:30,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083579909] [2020-09-04 23:15:30,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:15:30,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:15:30,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:15:30,232 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 24 states. [2020-09-04 23:15:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:30,900 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-09-04 23:15:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 23:15:30,900 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-09-04 23:15:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:30,902 INFO L225 Difference]: With dead ends: 230 [2020-09-04 23:15:30,902 INFO L226 Difference]: Without dead ends: 214 [2020-09-04 23:15:30,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:15:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-04 23:15:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-09-04 23:15:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 23:15:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-04 23:15:30,928 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 195 [2020-09-04 23:15:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,928 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-04 23:15:30,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:15:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-04 23:15:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-04 23:15:30,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,929 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:30,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:15:30,929 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1492038333, now seen corresponding path program 20 times [2020-09-04 23:15:30,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125023802] [2020-09-04 23:15:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:32,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125023802] [2020-09-04 23:15:32,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:32,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-04 23:15:32,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291434178] [2020-09-04 23:15:32,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 23:15:32,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 23:15:32,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:15:32,363 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2020-09-04 23:15:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:34,772 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2020-09-04 23:15:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 23:15:34,772 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 197 [2020-09-04 23:15:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:34,774 INFO L225 Difference]: With dead ends: 217 [2020-09-04 23:15:34,774 INFO L226 Difference]: Without dead ends: 210 [2020-09-04 23:15:34,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=297, Invalid=6509, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:15:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-04 23:15:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-09-04 23:15:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-04 23:15:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-09-04 23:15:34,808 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 197 [2020-09-04 23:15:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:34,809 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-09-04 23:15:34,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 23:15:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-09-04 23:15:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-04 23:15:34,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:34,811 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:34,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:15:34,811 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:34,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1864644010, now seen corresponding path program 21 times [2020-09-04 23:15:34,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:34,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736784742] [2020-09-04 23:15:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 21 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:35,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736784742] [2020-09-04 23:15:35,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:35,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 23:15:35,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036952263] [2020-09-04 23:15:35,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 23:15:35,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 23:15:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:15:35,357 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 25 states. [2020-09-04 23:15:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:36,079 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-09-04 23:15:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:15:36,079 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 204 [2020-09-04 23:15:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:36,082 INFO L225 Difference]: With dead ends: 239 [2020-09-04 23:15:36,082 INFO L226 Difference]: Without dead ends: 223 [2020-09-04 23:15:36,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:15:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-04 23:15:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-09-04 23:15:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-04 23:15:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2020-09-04 23:15:36,122 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2020-09-04 23:15:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:36,122 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2020-09-04 23:15:36,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 23:15:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2020-09-04 23:15:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 23:15:36,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:36,124 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:36,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:15:36,124 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1995094745, now seen corresponding path program 21 times [2020-09-04 23:15:36,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:36,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979051930] [2020-09-04 23:15:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:37,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:37,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979051930] [2020-09-04 23:15:37,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:37,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-04 23:15:37,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981387109] [2020-09-04 23:15:37,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-04 23:15:37,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-04 23:15:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:15:37,628 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 47 states. [2020-09-04 23:15:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:40,308 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2020-09-04 23:15:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 23:15:40,309 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 206 [2020-09-04 23:15:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:40,311 INFO L225 Difference]: With dead ends: 226 [2020-09-04 23:15:40,311 INFO L226 Difference]: Without dead ends: 219 [2020-09-04 23:15:40,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=312, Invalid=7170, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:15:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-04 23:15:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-09-04 23:15:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-04 23:15:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2020-09-04 23:15:40,356 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2020-09-04 23:15:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:40,356 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2020-09-04 23:15:40,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-04 23:15:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2020-09-04 23:15:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-09-04 23:15:40,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:40,358 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:40,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:15:40,359 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:40,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795392, now seen corresponding path program 22 times [2020-09-04 23:15:40,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:40,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536277377] [2020-09-04 23:15:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:40,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 22 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:40,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536277377] [2020-09-04 23:15:40,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:40,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:15:40,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501254431] [2020-09-04 23:15:40,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:15:40,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:15:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:15:40,908 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 26 states. [2020-09-04 23:15:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:41,694 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-09-04 23:15:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:15:41,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-09-04 23:15:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:41,697 INFO L225 Difference]: With dead ends: 248 [2020-09-04 23:15:41,697 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 23:15:41,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:15:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 23:15:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-09-04 23:15:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 23:15:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-09-04 23:15:41,737 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 213 [2020-09-04 23:15:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:41,737 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-09-04 23:15:41,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:15:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-09-04 23:15:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-04 23:15:41,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:41,739 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:41,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:15:41,739 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -748407293, now seen corresponding path program 22 times [2020-09-04 23:15:41,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:41,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177441324] [2020-09-04 23:15:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 0 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:43,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177441324] [2020-09-04 23:15:43,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:43,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-04 23:15:43,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160473842] [2020-09-04 23:15:43,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 23:15:43,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 23:15:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:15:43,396 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 49 states. [2020-09-04 23:15:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:46,387 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2020-09-04 23:15:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:15:46,387 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-09-04 23:15:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:46,389 INFO L225 Difference]: With dead ends: 235 [2020-09-04 23:15:46,389 INFO L226 Difference]: Without dead ends: 228 [2020-09-04 23:15:46,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=327, Invalid=7863, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 23:15:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-04 23:15:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-09-04 23:15:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-09-04 23:15:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-09-04 23:15:46,424 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 215 [2020-09-04 23:15:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:46,425 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-09-04 23:15:46,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 23:15:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-09-04 23:15:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-09-04 23:15:46,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:46,427 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:46,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:15:46,427 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1037404566, now seen corresponding path program 23 times [2020-09-04 23:15:46,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:46,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717399764] [2020-09-04 23:15:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 23 proven. 2323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:47,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717399764] [2020-09-04 23:15:47,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:47,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 23:15:47,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129578362] [2020-09-04 23:15:47,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 23:15:47,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 23:15:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:15:47,045 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 27 states. [2020-09-04 23:15:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:47,910 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2020-09-04 23:15:47,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 23:15:47,911 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 222 [2020-09-04 23:15:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:47,913 INFO L225 Difference]: With dead ends: 257 [2020-09-04 23:15:47,914 INFO L226 Difference]: Without dead ends: 241 [2020-09-04 23:15:47,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:15:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-04 23:15:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2020-09-04 23:15:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-04 23:15:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-09-04 23:15:47,956 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 222 [2020-09-04 23:15:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:47,956 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-09-04 23:15:47,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 23:15:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-09-04 23:15:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-09-04 23:15:47,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:47,958 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:47,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:15:47,958 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -864966119, now seen corresponding path program 23 times [2020-09-04 23:15:47,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:47,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695518585] [2020-09-04 23:15:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:49,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 0 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:49,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695518585] [2020-09-04 23:15:49,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:49,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-04 23:15:49,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705820763] [2020-09-04 23:15:49,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-04 23:15:49,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-04 23:15:49,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:15:49,785 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 51 states. [2020-09-04 23:15:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:52,907 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2020-09-04 23:15:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 23:15:52,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 224 [2020-09-04 23:15:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:52,909 INFO L225 Difference]: With dead ends: 244 [2020-09-04 23:15:52,909 INFO L226 Difference]: Without dead ends: 237 [2020-09-04 23:15:52,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=342, Invalid=8588, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:15:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-04 23:15:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-09-04 23:15:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 23:15:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-09-04 23:15:52,966 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 224 [2020-09-04 23:15:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:52,966 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-09-04 23:15:52,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-04 23:15:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-09-04 23:15:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-09-04 23:15:52,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:52,968 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:52,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:15:52,968 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:52,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1641509056, now seen corresponding path program 24 times [2020-09-04 23:15:52,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:52,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102418659] [2020-09-04 23:15:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 24 proven. 2532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:53,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102418659] [2020-09-04 23:15:53,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:53,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:15:53,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212519485] [2020-09-04 23:15:53,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:15:53,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:53,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:15:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:15:53,593 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 28 states. [2020-09-04 23:15:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:54,493 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-09-04 23:15:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 23:15:54,494 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-09-04 23:15:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:54,496 INFO L225 Difference]: With dead ends: 266 [2020-09-04 23:15:54,496 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 23:15:54,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:15:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 23:15:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2020-09-04 23:15:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 23:15:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-09-04 23:15:54,532 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 231 [2020-09-04 23:15:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:54,532 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-09-04 23:15:54,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:15:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-09-04 23:15:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-09-04 23:15:54,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:54,534 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:54,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:15:54,535 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -141136189, now seen corresponding path program 24 times [2020-09-04 23:15:54,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945556713] [2020-09-04 23:15:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:56,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 0 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:56,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945556713] [2020-09-04 23:15:56,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:56,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-04 23:15:56,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224976219] [2020-09-04 23:15:56,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 23:15:56,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 23:15:56,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:15:56,452 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 53 states. [2020-09-04 23:15:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:59,757 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2020-09-04 23:15:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 23:15:59,758 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 233 [2020-09-04 23:15:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:59,760 INFO L225 Difference]: With dead ends: 253 [2020-09-04 23:15:59,760 INFO L226 Difference]: Without dead ends: 246 [2020-09-04 23:15:59,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=357, Invalid=9345, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 23:15:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-04 23:15:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-09-04 23:15:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-09-04 23:15:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-09-04 23:15:59,807 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 233 [2020-09-04 23:15:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:59,808 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-09-04 23:15:59,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 23:15:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-09-04 23:15:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-04 23:15:59,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:59,810 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:59,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 23:15:59,810 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2011825962, now seen corresponding path program 25 times [2020-09-04 23:15:59,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:59,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192016388] [2020-09-04 23:15:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 25 proven. 2750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:00,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192016388] [2020-09-04 23:16:00,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:00,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 23:16:00,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627799117] [2020-09-04 23:16:00,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 23:16:00,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 23:16:00,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:16:00,498 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 29 states. [2020-09-04 23:16:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:01,457 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2020-09-04 23:16:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 23:16:01,458 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 240 [2020-09-04 23:16:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:01,459 INFO L225 Difference]: With dead ends: 275 [2020-09-04 23:16:01,460 INFO L226 Difference]: Without dead ends: 259 [2020-09-04 23:16:01,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:16:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-04 23:16:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2020-09-04 23:16:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-04 23:16:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2020-09-04 23:16:01,507 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 240 [2020-09-04 23:16:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:01,507 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2020-09-04 23:16:01,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 23:16:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2020-09-04 23:16:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-09-04 23:16:01,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:01,509 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:01,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 23:16:01,509 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2007807655, now seen corresponding path program 25 times [2020-09-04 23:16:01,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:01,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524810010] [2020-09-04 23:16:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 0 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:03,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524810010] [2020-09-04 23:16:03,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:03,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-09-04 23:16:03,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717686445] [2020-09-04 23:16:03,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 23:16:03,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 23:16:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:16:03,545 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 55 states. [2020-09-04 23:16:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:07,211 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-09-04 23:16:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 23:16:07,212 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 242 [2020-09-04 23:16:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:07,214 INFO L225 Difference]: With dead ends: 262 [2020-09-04 23:16:07,214 INFO L226 Difference]: Without dead ends: 255 [2020-09-04 23:16:07,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=372, Invalid=10134, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 23:16:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-04 23:16:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-09-04 23:16:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 23:16:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-09-04 23:16:07,261 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 242 [2020-09-04 23:16:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:07,261 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-09-04 23:16:07,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 23:16:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-09-04 23:16:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-09-04 23:16:07,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:07,263 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:07,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 23:16:07,263 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1979700864, now seen corresponding path program 26 times [2020-09-04 23:16:07,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:07,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234208120] [2020-09-04 23:16:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:07,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 26 proven. 2977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:07,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234208120] [2020-09-04 23:16:07,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:07,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:16:07,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894422818] [2020-09-04 23:16:07,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:16:07,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:16:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:16:07,980 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 30 states. [2020-09-04 23:16:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:09,003 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-09-04 23:16:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 23:16:09,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-09-04 23:16:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:09,006 INFO L225 Difference]: With dead ends: 284 [2020-09-04 23:16:09,006 INFO L226 Difference]: Without dead ends: 268 [2020-09-04 23:16:09,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:16:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-09-04 23:16:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2020-09-04 23:16:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 23:16:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-09-04 23:16:09,046 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 249 [2020-09-04 23:16:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:09,046 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-09-04 23:16:09,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:16:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-09-04 23:16:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-09-04 23:16:09,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:09,048 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:09,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 23:16:09,048 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1200359549, now seen corresponding path program 26 times [2020-09-04 23:16:09,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:09,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165887134] [2020-09-04 23:16:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:11,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3055 backedges. 0 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:11,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165887134] [2020-09-04 23:16:11,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:11,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-04 23:16:11,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29086816] [2020-09-04 23:16:11,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 23:16:11,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 23:16:11,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:16:11,273 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 57 states. [2020-09-04 23:16:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:15,194 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2020-09-04 23:16:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 23:16:15,195 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 251 [2020-09-04 23:16:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:15,197 INFO L225 Difference]: With dead ends: 271 [2020-09-04 23:16:15,197 INFO L226 Difference]: Without dead ends: 264 [2020-09-04 23:16:15,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=387, Invalid=10955, Unknown=0, NotChecked=0, Total=11342 [2020-09-04 23:16:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-04 23:16:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-09-04 23:16:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-09-04 23:16:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2020-09-04 23:16:15,249 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 251 [2020-09-04 23:16:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:15,249 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2020-09-04 23:16:15,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 23:16:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2020-09-04 23:16:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-09-04 23:16:15,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:15,251 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:15,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 23:16:15,251 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash 223418390, now seen corresponding path program 27 times [2020-09-04 23:16:15,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:15,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285037616] [2020-09-04 23:16:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:17,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:17,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285037616] [2020-09-04 23:16:17,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:17,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-09-04 23:16:17,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193032069] [2020-09-04 23:16:17,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-04 23:16:17,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-04 23:16:17,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 23:16:17,590 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 59 states. [2020-09-04 23:16:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:21,796 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-09-04 23:16:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-04 23:16:21,797 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 258 [2020-09-04 23:16:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:21,799 INFO L225 Difference]: With dead ends: 280 [2020-09-04 23:16:21,799 INFO L226 Difference]: Without dead ends: 273 [2020-09-04 23:16:21,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=402, Invalid=11808, Unknown=0, NotChecked=0, Total=12210 [2020-09-04 23:16:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-04 23:16:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-09-04 23:16:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-04 23:16:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2020-09-04 23:16:21,850 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 258 [2020-09-04 23:16:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:21,851 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2020-09-04 23:16:21,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-04 23:16:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2020-09-04 23:16:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-04 23:16:21,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:21,852 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:21,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 23:16:21,852 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1044595677, now seen corresponding path program 28 times [2020-09-04 23:16:21,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:21,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666779426] [2020-09-04 23:16:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2020-09-04 23:16:21,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666779426] [2020-09-04 23:16:21,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:16:21,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:16:21,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973527768] [2020-09-04 23:16:21,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:16:21,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:16:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:16:21,955 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 3 states. [2020-09-04 23:16:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:22,039 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2020-09-04 23:16:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:16:22,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-09-04 23:16:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:22,042 INFO L225 Difference]: With dead ends: 288 [2020-09-04 23:16:22,042 INFO L226 Difference]: Without dead ends: 271 [2020-09-04 23:16:22,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:16:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-09-04 23:16:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-09-04 23:16:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-04 23:16:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-09-04 23:16:22,109 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-09-04 23:16:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:22,109 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-09-04 23:16:22,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:16:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-09-04 23:16:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-09-04 23:16:22,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:22,111 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:22,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 23:16:22,112 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1372310976, now seen corresponding path program 29 times [2020-09-04 23:16:22,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:22,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970256886] [2020-09-04 23:16:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 28 proven. 3458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:22,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970256886] [2020-09-04 23:16:22,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:22,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:16:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19544657] [2020-09-04 23:16:22,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:16:22,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:16:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:16:22,971 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-09-04 23:16:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:24,195 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-09-04 23:16:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 23:16:24,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-09-04 23:16:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:24,198 INFO L225 Difference]: With dead ends: 295 [2020-09-04 23:16:24,198 INFO L226 Difference]: Without dead ends: 287 [2020-09-04 23:16:24,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:16:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-04 23:16:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-09-04 23:16:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-09-04 23:16:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-09-04 23:16:24,244 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-09-04 23:16:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:24,245 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-09-04 23:16:24,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:16:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-09-04 23:16:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-09-04 23:16:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:24,247 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:24,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 23:16:24,247 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1614229437, now seen corresponding path program 27 times [2020-09-04 23:16:24,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:24,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70847654] [2020-09-04 23:16:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:26,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3542 backedges. 0 proven. 3542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:26,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70847654] [2020-09-04 23:16:26,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:26,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-09-04 23:16:26,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296478735] [2020-09-04 23:16:26,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 23:16:26,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 23:16:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:16:26,854 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 61 states. [2020-09-04 23:16:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:31,440 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2020-09-04 23:16:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 23:16:31,441 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 269 [2020-09-04 23:16:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:31,444 INFO L225 Difference]: With dead ends: 290 [2020-09-04 23:16:31,445 INFO L226 Difference]: Without dead ends: 283 [2020-09-04 23:16:31,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3543 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=417, Invalid=12693, Unknown=0, NotChecked=0, Total=13110 [2020-09-04 23:16:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-04 23:16:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-09-04 23:16:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-04 23:16:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2020-09-04 23:16:31,496 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 269 [2020-09-04 23:16:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:31,497 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2020-09-04 23:16:31,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 23:16:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2020-09-04 23:16:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-09-04 23:16:31,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:31,499 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:31,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 23:16:31,500 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -432347306, now seen corresponding path program 30 times [2020-09-04 23:16:31,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:31,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183254411] [2020-09-04 23:16:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:32,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 29 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:32,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183254411] [2020-09-04 23:16:32,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:32,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 23:16:32,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919678262] [2020-09-04 23:16:32,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 23:16:32,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 23:16:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:16:32,431 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 33 states. [2020-09-04 23:16:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:33,727 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-09-04 23:16:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-04 23:16:33,728 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 276 [2020-09-04 23:16:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:33,730 INFO L225 Difference]: With dead ends: 304 [2020-09-04 23:16:33,731 INFO L226 Difference]: Without dead ends: 296 [2020-09-04 23:16:33,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:16:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-04 23:16:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-09-04 23:16:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-09-04 23:16:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-09-04 23:16:33,776 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 276 [2020-09-04 23:16:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:33,777 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-09-04 23:16:33,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 23:16:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-09-04 23:16:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-09-04 23:16:33,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:33,778 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:33,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 23:16:33,778 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash -252274727, now seen corresponding path program 28 times [2020-09-04 23:16:33,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:33,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919955454] [2020-09-04 23:16:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3799 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:36,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919955454] [2020-09-04 23:16:36,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:36,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-09-04 23:16:36,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077158655] [2020-09-04 23:16:36,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-04 23:16:36,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-04 23:16:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:16:36,602 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 63 states. [2020-09-04 23:16:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:41,604 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-09-04 23:16:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-04 23:16:41,605 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 278 [2020-09-04 23:16:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:41,607 INFO L225 Difference]: With dead ends: 299 [2020-09-04 23:16:41,607 INFO L226 Difference]: Without dead ends: 292 [2020-09-04 23:16:41,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2020-09-04 23:16:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-04 23:16:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-09-04 23:16:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-09-04 23:16:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-09-04 23:16:41,688 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 278 [2020-09-04 23:16:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:41,688 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-09-04 23:16:41,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-04 23:16:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-09-04 23:16:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-09-04 23:16:41,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:41,691 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:41,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-04 23:16:41,691 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1077906176, now seen corresponding path program 31 times [2020-09-04 23:16:41,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:41,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197641793] [2020-09-04 23:16:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:42,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 30 proven. 3975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:42,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197641793] [2020-09-04 23:16:42,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:42,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:16:42,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503388405] [2020-09-04 23:16:42,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:16:42,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:16:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:16:42,690 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-09-04 23:16:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:44,088 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-09-04 23:16:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-04 23:16:44,089 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-09-04 23:16:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:44,091 INFO L225 Difference]: With dead ends: 313 [2020-09-04 23:16:44,091 INFO L226 Difference]: Without dead ends: 305 [2020-09-04 23:16:44,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:16:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-04 23:16:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-09-04 23:16:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-09-04 23:16:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-09-04 23:16:44,140 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-09-04 23:16:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:44,141 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-09-04 23:16:44,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:16:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-09-04 23:16:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-09-04 23:16:44,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:44,143 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:44,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-09-04 23:16:44,144 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash -597624573, now seen corresponding path program 29 times [2020-09-04 23:16:44,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:44,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619551480] [2020-09-04 23:16:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:47,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 0 proven. 4065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:47,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619551480] [2020-09-04 23:16:47,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:47,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-09-04 23:16:47,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098097123] [2020-09-04 23:16:47,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 23:16:47,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 23:16:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=4003, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:16:47,208 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 65 states. [2020-09-04 23:16:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:52,646 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-09-04 23:16:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-04 23:16:52,647 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 287 [2020-09-04 23:16:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:52,650 INFO L225 Difference]: With dead ends: 308 [2020-09-04 23:16:52,650 INFO L226 Difference]: Without dead ends: 301 [2020-09-04 23:16:52,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=447, Invalid=14559, Unknown=0, NotChecked=0, Total=15006 [2020-09-04 23:16:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-09-04 23:16:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-09-04 23:16:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-09-04 23:16:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-09-04 23:16:52,702 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 287 [2020-09-04 23:16:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:52,703 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-09-04 23:16:52,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 23:16:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-09-04 23:16:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-09-04 23:16:52,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:52,705 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:52,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-09-04 23:16:52,705 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash -427333994, now seen corresponding path program 32 times [2020-09-04 23:16:52,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:52,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314428072] [2020-09-04 23:16:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:53,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 31 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:53,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314428072] [2020-09-04 23:16:53,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:53,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-04 23:16:53,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123368563] [2020-09-04 23:16:53,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 23:16:53,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:53,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 23:16:53,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:16:53,778 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 35 states. [2020-09-04 23:16:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:55,259 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-09-04 23:16:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-04 23:16:55,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 294 [2020-09-04 23:16:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:55,263 INFO L225 Difference]: With dead ends: 322 [2020-09-04 23:16:55,263 INFO L226 Difference]: Without dead ends: 314 [2020-09-04 23:16:55,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:16:55,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-04 23:16:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2020-09-04 23:16:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-04 23:16:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2020-09-04 23:16:55,319 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 294 [2020-09-04 23:16:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:55,320 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2020-09-04 23:16:55,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 23:16:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2020-09-04 23:16:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-09-04 23:16:55,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:55,322 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:55,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-09-04 23:16:55,323 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:55,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:55,323 INFO L82 PathProgramCache]: Analyzing trace with hash 270550809, now seen corresponding path program 30 times [2020-09-04 23:16:55,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:55,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347648047] [2020-09-04 23:16:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4340 backedges. 0 proven. 4340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:58,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347648047] [2020-09-04 23:16:58,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:58,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-09-04 23:16:58,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377341763] [2020-09-04 23:16:58,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-09-04 23:16:58,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-09-04 23:16:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4260, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:16:58,666 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 67 states. [2020-09-04 23:17:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:04,682 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2020-09-04 23:17:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-04 23:17:04,683 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 296 [2020-09-04 23:17:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:04,686 INFO L225 Difference]: With dead ends: 317 [2020-09-04 23:17:04,686 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 23:17:04,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=462, Invalid=15540, Unknown=0, NotChecked=0, Total=16002 [2020-09-04 23:17:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 23:17:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-09-04 23:17:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-09-04 23:17:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-09-04 23:17:04,741 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 296 [2020-09-04 23:17:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:04,742 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-09-04 23:17:04,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-09-04 23:17:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-09-04 23:17:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-09-04 23:17:04,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:04,743 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:04,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-09-04 23:17:04,744 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:04,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1458451392, now seen corresponding path program 33 times [2020-09-04 23:17:04,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:04,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269928749] [2020-09-04 23:17:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:05,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 32 proven. 4528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:05,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269928749] [2020-09-04 23:17:05,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:05,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:17:05,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383765000] [2020-09-04 23:17:05,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:17:05,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:17:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:17:05,966 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-09-04 23:17:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:07,592 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2020-09-04 23:17:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-04 23:17:07,593 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-09-04 23:17:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:07,596 INFO L225 Difference]: With dead ends: 331 [2020-09-04 23:17:07,596 INFO L226 Difference]: Without dead ends: 323 [2020-09-04 23:17:07,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:17:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-09-04 23:17:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-09-04 23:17:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-09-04 23:17:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-09-04 23:17:07,652 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-09-04 23:17:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:07,653 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-09-04 23:17:07,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:17:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-09-04 23:17:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-09-04 23:17:07,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:07,655 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:07,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-09-04 23:17:07,655 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash 34107843, now seen corresponding path program 31 times [2020-09-04 23:17:07,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:07,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343014092] [2020-09-04 23:17:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:11,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:11,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343014092] [2020-09-04 23:17:11,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:11,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-09-04 23:17:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330831553] [2020-09-04 23:17:11,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 23:17:11,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:11,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 23:17:11,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4525, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:17:11,317 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 69 states. [2020-09-04 23:17:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:17,855 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2020-09-04 23:17:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-04 23:17:17,856 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 305 [2020-09-04 23:17:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:17,858 INFO L225 Difference]: With dead ends: 326 [2020-09-04 23:17:17,858 INFO L226 Difference]: Without dead ends: 319 [2020-09-04 23:17:17,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=477, Invalid=16553, Unknown=0, NotChecked=0, Total=17030 [2020-09-04 23:17:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-09-04 23:17:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2020-09-04 23:17:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-09-04 23:17:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2020-09-04 23:17:17,918 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 305 [2020-09-04 23:17:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:17,919 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2020-09-04 23:17:17,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 23:17:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2020-09-04 23:17:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-09-04 23:17:17,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:17,921 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:17,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-09-04 23:17:17,922 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash -588605994, now seen corresponding path program 34 times [2020-09-04 23:17:17,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:17,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651335221] [2020-09-04 23:17:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 33 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:19,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651335221] [2020-09-04 23:17:19,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:19,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-04 23:17:19,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449749987] [2020-09-04 23:17:19,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 23:17:19,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:19,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 23:17:19,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:17:19,218 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 37 states. [2020-09-04 23:17:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:21,016 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-09-04 23:17:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-09-04 23:17:21,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 312 [2020-09-04 23:17:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:21,020 INFO L225 Difference]: With dead ends: 340 [2020-09-04 23:17:21,020 INFO L226 Difference]: Without dead ends: 332 [2020-09-04 23:17:21,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:17:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-09-04 23:17:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2020-09-04 23:17:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-09-04 23:17:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-09-04 23:17:21,079 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 312 [2020-09-04 23:17:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:21,079 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-09-04 23:17:21,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 23:17:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-09-04 23:17:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-09-04 23:17:21,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:21,081 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:21,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-09-04 23:17:21,081 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash -93018535, now seen corresponding path program 32 times [2020-09-04 23:17:21,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:21,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929826893] [2020-09-04 23:17:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 0 proven. 4917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:25,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929826893] [2020-09-04 23:17:25,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:25,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-09-04 23:17:25,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540633520] [2020-09-04 23:17:25,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-09-04 23:17:25,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-09-04 23:17:25,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4798, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:17:25,164 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2020-09-04 23:17:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:32,418 INFO L93 Difference]: Finished difference Result 335 states and 336 transitions. [2020-09-04 23:17:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-09-04 23:17:32,419 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 314 [2020-09-04 23:17:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:32,422 INFO L225 Difference]: With dead ends: 335 [2020-09-04 23:17:32,423 INFO L226 Difference]: Without dead ends: 328 [2020-09-04 23:17:32,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=492, Invalid=17598, Unknown=0, NotChecked=0, Total=18090 [2020-09-04 23:17:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-04 23:17:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-09-04 23:17:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-09-04 23:17:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-09-04 23:17:32,487 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 314 [2020-09-04 23:17:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:32,487 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-09-04 23:17:32,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-09-04 23:17:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-09-04 23:17:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-09-04 23:17:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:32,490 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:32,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-09-04 23:17:32,490 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1846291584, now seen corresponding path program 35 times [2020-09-04 23:17:32,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:32,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660478635] [2020-09-04 23:17:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:33,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 34 proven. 5117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:33,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660478635] [2020-09-04 23:17:33,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:33,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:17:33,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042451804] [2020-09-04 23:17:33,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:17:33,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:17:33,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:17:33,886 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-09-04 23:17:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:35,857 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2020-09-04 23:17:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-04 23:17:35,859 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-09-04 23:17:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:35,861 INFO L225 Difference]: With dead ends: 349 [2020-09-04 23:17:35,861 INFO L226 Difference]: Without dead ends: 341 [2020-09-04 23:17:35,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:17:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-09-04 23:17:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-09-04 23:17:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-09-04 23:17:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-09-04 23:17:35,924 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-09-04 23:17:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:35,925 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-09-04 23:17:35,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:17:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-09-04 23:17:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-09-04 23:17:35,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:35,926 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:35,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-09-04 23:17:35,927 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -913622397, now seen corresponding path program 33 times [2020-09-04 23:17:35,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:35,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207918427] [2020-09-04 23:17:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 0 proven. 5219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:40,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207918427] [2020-09-04 23:17:40,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:40,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-09-04 23:17:40,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597560530] [2020-09-04 23:17:40,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-09-04 23:17:40,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-09-04 23:17:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5079, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:17:40,440 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 73 states. [2020-09-04 23:17:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:48,484 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2020-09-04 23:17:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-04 23:17:48,486 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 323 [2020-09-04 23:17:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:48,487 INFO L225 Difference]: With dead ends: 344 [2020-09-04 23:17:48,488 INFO L226 Difference]: Without dead ends: 337 [2020-09-04 23:17:48,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=507, Invalid=18675, Unknown=0, NotChecked=0, Total=19182 [2020-09-04 23:17:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-09-04 23:17:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-09-04 23:17:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-09-04 23:17:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-09-04 23:17:48,573 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 323 [2020-09-04 23:17:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:48,574 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-09-04 23:17:48,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-09-04 23:17:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-09-04 23:17:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-04 23:17:48,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:48,575 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:48,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-09-04 23:17:48,576 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:48,576 INFO L82 PathProgramCache]: Analyzing trace with hash -753371882, now seen corresponding path program 36 times [2020-09-04 23:17:48,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:48,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763889612] [2020-09-04 23:17:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 35 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:50,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763889612] [2020-09-04 23:17:50,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:50,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-04 23:17:50,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981491716] [2020-09-04 23:17:50,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 23:17:50,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 23:17:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:17:50,131 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 39 states. [2020-09-04 23:17:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:52,323 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2020-09-04 23:17:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-04 23:17:52,324 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 330 [2020-09-04 23:17:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:52,327 INFO L225 Difference]: With dead ends: 358 [2020-09-04 23:17:52,327 INFO L226 Difference]: Without dead ends: 350 [2020-09-04 23:17:52,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:17:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-09-04 23:17:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2020-09-04 23:17:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-09-04 23:17:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2020-09-04 23:17:52,394 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 330 [2020-09-04 23:17:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:52,395 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2020-09-04 23:17:52,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 23:17:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2020-09-04 23:17:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-04 23:17:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:52,396 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:52,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-09-04 23:17:52,397 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 480753049, now seen corresponding path program 34 times [2020-09-04 23:17:52,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:52,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652027155] [2020-09-04 23:17:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5530 backedges. 0 proven. 5530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:57,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652027155] [2020-09-04 23:17:57,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:57,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-09-04 23:17:57,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232766402] [2020-09-04 23:17:57,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-09-04 23:17:57,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-09-04 23:17:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:17:57,376 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 75 states. [2020-09-04 23:18:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:06,392 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2020-09-04 23:18:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-04 23:18:06,394 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 332 [2020-09-04 23:18:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:06,396 INFO L225 Difference]: With dead ends: 353 [2020-09-04 23:18:06,397 INFO L226 Difference]: Without dead ends: 346 [2020-09-04 23:18:06,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=522, Invalid=19784, Unknown=0, NotChecked=0, Total=20306 [2020-09-04 23:18:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-04 23:18:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-09-04 23:18:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-09-04 23:18:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-09-04 23:18:06,465 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 332 [2020-09-04 23:18:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:06,465 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-09-04 23:18:06,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-09-04 23:18:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-09-04 23:18:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-09-04 23:18:06,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:06,467 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:06,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-09-04 23:18:06,467 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash 644183360, now seen corresponding path program 37 times [2020-09-04 23:18:06,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:06,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898489100] [2020-09-04 23:18:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:08,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 36 proven. 5742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:08,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898489100] [2020-09-04 23:18:08,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:08,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:18:08,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363030622] [2020-09-04 23:18:08,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:18:08,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:18:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:18:08,209 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-09-04 23:18:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:10,716 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2020-09-04 23:18:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-09-04 23:18:10,718 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-09-04 23:18:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:10,721 INFO L225 Difference]: With dead ends: 367 [2020-09-04 23:18:10,721 INFO L226 Difference]: Without dead ends: 359 [2020-09-04 23:18:10,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:18:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-09-04 23:18:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-09-04 23:18:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-09-04 23:18:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-09-04 23:18:10,791 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-09-04 23:18:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:10,791 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-09-04 23:18:10,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:18:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-09-04 23:18:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-09-04 23:18:10,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:10,794 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:10,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-09-04 23:18:10,794 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -793423037, now seen corresponding path program 35 times [2020-09-04 23:18:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:10,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825366194] [2020-09-04 23:18:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:16,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5850 backedges. 0 proven. 5850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:16,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825366194] [2020-09-04 23:18:16,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:16,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-09-04 23:18:16,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953454462] [2020-09-04 23:18:16,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-09-04 23:18:16,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-09-04 23:18:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5665, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:18:16,377 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 77 states. [2020-09-04 23:18:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:26,438 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2020-09-04 23:18:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-09-04 23:18:26,440 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 341 [2020-09-04 23:18:26,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:26,443 INFO L225 Difference]: With dead ends: 362 [2020-09-04 23:18:26,443 INFO L226 Difference]: Without dead ends: 355 [2020-09-04 23:18:26,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=537, Invalid=20925, Unknown=0, NotChecked=0, Total=21462 [2020-09-04 23:18:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-09-04 23:18:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-09-04 23:18:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-04 23:18:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-09-04 23:18:26,522 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 341 [2020-09-04 23:18:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:26,522 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-09-04 23:18:26,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-09-04 23:18:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-09-04 23:18:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-09-04 23:18:26,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:26,525 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:26,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-09-04 23:18:26,525 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1304757334, now seen corresponding path program 38 times [2020-09-04 23:18:26,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:26,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169182126] [2020-09-04 23:18:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:28,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 37 proven. 6068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:28,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169182126] [2020-09-04 23:18:28,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:28,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 23:18:28,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168823159] [2020-09-04 23:18:28,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 23:18:28,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 23:18:28,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:18:28,561 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 41 states. [2020-09-04 23:18:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:31,286 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2020-09-04 23:18:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-04 23:18:31,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 348 [2020-09-04 23:18:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:31,290 INFO L225 Difference]: With dead ends: 376 [2020-09-04 23:18:31,290 INFO L226 Difference]: Without dead ends: 368 [2020-09-04 23:18:31,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:18:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-09-04 23:18:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2020-09-04 23:18:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-09-04 23:18:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-09-04 23:18:31,366 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 348 [2020-09-04 23:18:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:31,366 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-09-04 23:18:31,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 23:18:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-09-04 23:18:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-09-04 23:18:31,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:31,369 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:31,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-09-04 23:18:31,369 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:31,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1636993831, now seen corresponding path program 36 times [2020-09-04 23:18:31,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:31,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360874692] [2020-09-04 23:18:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:37,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:37,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360874692] [2020-09-04 23:18:37,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:37,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-09-04 23:18:37,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942582669] [2020-09-04 23:18:37,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-09-04 23:18:37,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-09-04 23:18:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:18:37,576 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 79 states. [2020-09-04 23:18:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:54,154 INFO L93 Difference]: Finished difference Result 371 states and 372 transitions. [2020-09-04 23:18:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-04 23:18:54,156 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 350 [2020-09-04 23:18:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:54,158 INFO L225 Difference]: With dead ends: 371 [2020-09-04 23:18:54,159 INFO L226 Difference]: Without dead ends: 364 [2020-09-04 23:18:54,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=552, Invalid=22098, Unknown=0, NotChecked=0, Total=22650 [2020-09-04 23:18:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-09-04 23:18:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-09-04 23:18:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-09-04 23:18:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-09-04 23:18:54,266 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 350 [2020-09-04 23:18:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:54,266 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-09-04 23:18:54,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-09-04 23:18:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-09-04 23:18:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-09-04 23:18:54,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:54,269 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:54,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-09-04 23:18:54,269 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:54,270 INFO L82 PathProgramCache]: Analyzing trace with hash 96865792, now seen corresponding path program 39 times [2020-09-04 23:18:54,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:54,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204886119] [2020-09-04 23:18:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:56,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 38 proven. 6403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:56,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204886119] [2020-09-04 23:18:56,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:56,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:18:56,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939764847] [2020-09-04 23:18:56,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:18:56,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:56,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:18:56,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:18:56,563 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-09-04 23:19:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:00,094 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2020-09-04 23:19:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-04 23:19:00,097 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-09-04 23:19:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:00,099 INFO L225 Difference]: With dead ends: 385 [2020-09-04 23:19:00,099 INFO L226 Difference]: Without dead ends: 377 [2020-09-04 23:19:00,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:19:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-04 23:19:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-09-04 23:19:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-09-04 23:19:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-09-04 23:19:00,180 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-09-04 23:19:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:00,181 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-09-04 23:19:00,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:19:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-09-04 23:19:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-09-04 23:19:00,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:00,184 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:00,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-09-04 23:19:00,184 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1515371523, now seen corresponding path program 37 times [2020-09-04 23:19:00,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:00,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768540405] [2020-09-04 23:19:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6517 backedges. 0 proven. 6517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:07,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768540405] [2020-09-04 23:19:07,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:07,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-09-04 23:19:07,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437150190] [2020-09-04 23:19:07,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-09-04 23:19:07,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:07,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-09-04 23:19:07,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6283, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:19:07,214 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 81 states. [2020-09-04 23:19:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:20,617 INFO L93 Difference]: Finished difference Result 380 states and 381 transitions. [2020-09-04 23:19:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-04 23:19:20,620 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 359 [2020-09-04 23:19:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:20,623 INFO L225 Difference]: With dead ends: 380 [2020-09-04 23:19:20,623 INFO L226 Difference]: Without dead ends: 373 [2020-09-04 23:19:20,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2020-09-04 23:19:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-09-04 23:19:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-09-04 23:19:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-09-04 23:19:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2020-09-04 23:19:20,704 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 359 [2020-09-04 23:19:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:20,704 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2020-09-04 23:19:20,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-09-04 23:19:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2020-09-04 23:19:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-09-04 23:19:20,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:20,706 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:20,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-09-04 23:19:20,706 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1935391850, now seen corresponding path program 40 times [2020-09-04 23:19:20,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:20,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62746070] [2020-09-04 23:19:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 39 proven. 6747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:23,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62746070] [2020-09-04 23:19:23,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:23,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-04 23:19:23,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518850636] [2020-09-04 23:19:23,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 23:19:23,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:23,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 23:19:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:19:23,268 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand 43 states. [2020-09-04 23:19:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:26,680 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2020-09-04 23:19:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-09-04 23:19:26,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 366 [2020-09-04 23:19:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:26,685 INFO L225 Difference]: With dead ends: 394 [2020-09-04 23:19:26,685 INFO L226 Difference]: Without dead ends: 386 [2020-09-04 23:19:26,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:19:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-09-04 23:19:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-09-04 23:19:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-09-04 23:19:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2020-09-04 23:19:26,778 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 366 [2020-09-04 23:19:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:26,779 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2020-09-04 23:19:26,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 23:19:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2020-09-04 23:19:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-04 23:19:26,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:26,782 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-09-04 23:19:26,782 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1569070055, now seen corresponding path program 38 times [2020-09-04 23:19:26,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839097552] [2020-09-04 23:19:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:34,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:35,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839097552] [2020-09-04 23:19:35,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:35,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-09-04 23:19:35,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866183056] [2020-09-04 23:19:35,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-09-04 23:19:35,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-09-04 23:19:35,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6604, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:19:35,139 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand 83 states. [2020-09-04 23:19:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:50,138 INFO L93 Difference]: Finished difference Result 389 states and 390 transitions. [2020-09-04 23:19:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-09-04 23:19:50,141 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 368 [2020-09-04 23:19:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:50,144 INFO L225 Difference]: With dead ends: 389 [2020-09-04 23:19:50,144 INFO L226 Difference]: Without dead ends: 382 [2020-09-04 23:19:50,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=582, Invalid=24540, Unknown=0, NotChecked=0, Total=25122 [2020-09-04 23:19:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-09-04 23:19:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-09-04 23:19:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-09-04 23:19:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-09-04 23:19:50,253 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 368 [2020-09-04 23:19:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:50,253 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-09-04 23:19:50,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-09-04 23:19:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-09-04 23:19:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-09-04 23:19:50,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:50,256 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:50,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-09-04 23:19:50,257 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 922351296, now seen corresponding path program 41 times [2020-09-04 23:19:50,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:50,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418074786] [2020-09-04 23:19:50,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:53,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 40 proven. 7100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:53,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418074786] [2020-09-04 23:19:53,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:53,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:19:53,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60827549] [2020-09-04 23:19:53,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:19:53,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:53,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:19:53,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:19:53,315 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-09-04 23:19:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:57,581 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-09-04 23:19:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-09-04 23:19:57,584 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-09-04 23:19:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:57,587 INFO L225 Difference]: With dead ends: 403 [2020-09-04 23:19:57,587 INFO L226 Difference]: Without dead ends: 395 [2020-09-04 23:19:57,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:19:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-09-04 23:19:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-09-04 23:19:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-09-04 23:19:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-09-04 23:19:57,690 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-09-04 23:19:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:57,691 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-09-04 23:19:57,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:19:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-09-04 23:19:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-09-04 23:19:57,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:57,694 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:57,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-09-04 23:19:57,694 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 237991107, now seen corresponding path program 39 times [2020-09-04 23:19:57,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:57,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198471258] [2020-09-04 23:19:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:06,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7220 backedges. 0 proven. 7220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:07,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198471258] [2020-09-04 23:20:07,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:07,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-09-04 23:20:07,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550632617] [2020-09-04 23:20:07,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-09-04 23:20:07,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-09-04 23:20:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6933, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:20:07,132 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 85 states. [2020-09-04 23:20:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:32,919 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2020-09-04 23:20:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-09-04 23:20:32,923 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 377 [2020-09-04 23:20:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:32,926 INFO L225 Difference]: With dead ends: 398 [2020-09-04 23:20:32,927 INFO L226 Difference]: Without dead ends: 391 [2020-09-04 23:20:32,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7455 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=597, Invalid=25809, Unknown=0, NotChecked=0, Total=26406 [2020-09-04 23:20:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-09-04 23:20:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-09-04 23:20:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-09-04 23:20:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2020-09-04 23:20:33,018 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 377 [2020-09-04 23:20:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:33,018 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2020-09-04 23:20:33,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-09-04 23:20:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2020-09-04 23:20:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-09-04 23:20:33,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:33,021 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:33,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-09-04 23:20:33,022 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash -899009834, now seen corresponding path program 42 times [2020-09-04 23:20:33,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:33,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67495683] [2020-09-04 23:20:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 41 proven. 7462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:36,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67495683] [2020-09-04 23:20:36,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:36,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-04 23:20:36,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345872199] [2020-09-04 23:20:36,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 23:20:36,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 23:20:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:20:36,314 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand 45 states. [2020-09-04 23:20:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:41,188 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-09-04 23:20:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-04 23:20:41,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 384 [2020-09-04 23:20:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:41,194 INFO L225 Difference]: With dead ends: 412 [2020-09-04 23:20:41,195 INFO L226 Difference]: Without dead ends: 404 [2020-09-04 23:20:41,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:20:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-09-04 23:20:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-09-04 23:20:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-09-04 23:20:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2020-09-04 23:20:41,285 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 384 [2020-09-04 23:20:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:41,285 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2020-09-04 23:20:41,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 23:20:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2020-09-04 23:20:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-09-04 23:20:41,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:41,287 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:41,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-09-04 23:20:41,288 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2038365351, now seen corresponding path program 40 times [2020-09-04 23:20:41,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:41,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972113686] [2020-09-04 23:20:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:52,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 0 proven. 7585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:52,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972113686] [2020-09-04 23:20:52,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:52,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-09-04 23:20:52,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585845267] [2020-09-04 23:20:52,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-09-04 23:20:52,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-09-04 23:20:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:20:52,243 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 87 states. [2020-09-04 23:21:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:22,351 INFO L93 Difference]: Finished difference Result 407 states and 408 transitions. [2020-09-04 23:21:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-04 23:21:22,355 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 386 [2020-09-04 23:21:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:22,357 INFO L225 Difference]: With dead ends: 407 [2020-09-04 23:21:22,357 INFO L226 Difference]: Without dead ends: 400 [2020-09-04 23:21:22,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=612, Invalid=27110, Unknown=0, NotChecked=0, Total=27722 [2020-09-04 23:21:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-04 23:21:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-09-04 23:21:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-09-04 23:21:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-09-04 23:21:22,455 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 386 [2020-09-04 23:21:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:22,456 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-09-04 23:21:22,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-09-04 23:21:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-09-04 23:21:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-09-04 23:21:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:22,459 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:22,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-09-04 23:21:22,460 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1238183808, now seen corresponding path program 43 times [2020-09-04 23:21:22,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:22,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919057200] [2020-09-04 23:21:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:26,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 42 proven. 7833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:26,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919057200] [2020-09-04 23:21:26,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:26,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:21:26,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5951867] [2020-09-04 23:21:26,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:21:26,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:21:26,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:21:26,552 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-09-04 23:21:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:32,022 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2020-09-04 23:21:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-04 23:21:32,027 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-09-04 23:21:32,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:32,030 INFO L225 Difference]: With dead ends: 421 [2020-09-04 23:21:32,030 INFO L226 Difference]: Without dead ends: 413 [2020-09-04 23:21:32,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:21:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-09-04 23:21:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-09-04 23:21:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-04 23:21:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-09-04 23:21:32,145 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-09-04 23:21:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:32,146 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-09-04 23:21:32,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:21:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-09-04 23:21:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-09-04 23:21:32,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:32,149 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:32,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-09-04 23:21:32,149 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1189642877, now seen corresponding path program 41 times [2020-09-04 23:21:32,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:32,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784135293] [2020-09-04 23:21:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:44,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7959 backedges. 0 proven. 7959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:44,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784135293] [2020-09-04 23:21:44,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:44,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-09-04 23:21:44,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453200477] [2020-09-04 23:21:44,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-09-04 23:21:44,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-09-04 23:21:44,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7615, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:21:44,592 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 89 states. [2020-09-04 23:22:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:05,808 INFO L93 Difference]: Finished difference Result 416 states and 417 transitions. [2020-09-04 23:22:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-04 23:22:05,811 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 395 [2020-09-04 23:22:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:05,813 INFO L225 Difference]: With dead ends: 416 [2020-09-04 23:22:05,814 INFO L226 Difference]: Without dead ends: 409 [2020-09-04 23:22:05,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=627, Invalid=28443, Unknown=0, NotChecked=0, Total=29070 [2020-09-04 23:22:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-09-04 23:22:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-09-04 23:22:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-09-04 23:22:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2020-09-04 23:22:05,909 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 395 [2020-09-04 23:22:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:05,909 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2020-09-04 23:22:05,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-09-04 23:22:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2020-09-04 23:22:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-04 23:22:05,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:05,921 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:05,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-09-04 23:22:05,921 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:05,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2093666838, now seen corresponding path program 44 times [2020-09-04 23:22:05,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:05,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239925289] [2020-09-04 23:22:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:09,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 43 proven. 8213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:09,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239925289] [2020-09-04 23:22:09,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:09,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-04 23:22:09,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178790105] [2020-09-04 23:22:09,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-04 23:22:09,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-04 23:22:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:22:09,400 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand 47 states. [2020-09-04 23:22:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:14,146 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2020-09-04 23:22:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-09-04 23:22:14,150 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 402 [2020-09-04 23:22:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:14,152 INFO L225 Difference]: With dead ends: 430 [2020-09-04 23:22:14,152 INFO L226 Difference]: Without dead ends: 422 [2020-09-04 23:22:14,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 23:22:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-09-04 23:22:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2020-09-04 23:22:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-09-04 23:22:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2020-09-04 23:22:14,259 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 402 [2020-09-04 23:22:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:14,260 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2020-09-04 23:22:14,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-04 23:22:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2020-09-04 23:22:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-09-04 23:22:14,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:14,262 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:14,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-09-04 23:22:14,262 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 590795417, now seen corresponding path program 42 times [2020-09-04 23:22:14,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:14,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305081463] [2020-09-04 23:22:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8342 backedges. 0 proven. 8342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:25,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305081463] [2020-09-04 23:22:25,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:25,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-09-04 23:22:25,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111743159] [2020-09-04 23:22:25,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-09-04 23:22:25,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-09-04 23:22:25,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7968, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 23:22:25,703 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand 91 states. [2020-09-04 23:22:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:46,704 INFO L93 Difference]: Finished difference Result 425 states and 426 transitions. [2020-09-04 23:22:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-09-04 23:22:46,707 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 404 [2020-09-04 23:22:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:46,710 INFO L225 Difference]: With dead ends: 425 [2020-09-04 23:22:46,710 INFO L226 Difference]: Without dead ends: 418 [2020-09-04 23:22:46,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8658 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=642, Invalid=29808, Unknown=0, NotChecked=0, Total=30450 [2020-09-04 23:22:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-09-04 23:22:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-09-04 23:22:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-09-04 23:22:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-09-04 23:22:46,819 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 404 [2020-09-04 23:22:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:46,819 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-09-04 23:22:46,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-09-04 23:22:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-09-04 23:22:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-04 23:22:46,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:46,822 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:46,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-09-04 23:22:46,822 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:46,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:46,822 INFO L82 PathProgramCache]: Analyzing trace with hash -217335744, now seen corresponding path program 45 times [2020-09-04 23:22:46,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:46,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320274875] [2020-09-04 23:22:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 44 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:51,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320274875] [2020-09-04 23:22:51,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:51,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:22:51,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499767999] [2020-09-04 23:22:51,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:22:51,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:22:51,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:22:51,040 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-09-04 23:22:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:56,862 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2020-09-04 23:22:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-09-04 23:22:56,867 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-09-04 23:22:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:56,870 INFO L225 Difference]: With dead ends: 439 [2020-09-04 23:22:56,870 INFO L226 Difference]: Without dead ends: 431 [2020-09-04 23:22:56,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 23:22:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-09-04 23:22:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-09-04 23:22:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-09-04 23:22:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-09-04 23:22:56,985 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-09-04 23:22:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:56,985 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-09-04 23:22:56,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:22:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-09-04 23:22:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-09-04 23:22:56,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:56,987 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:56,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-09-04 23:22:56,988 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 215406147, now seen corresponding path program 43 times [2020-09-04 23:22:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:56,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343397315] [2020-09-04 23:22:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8734 backedges. 0 proven. 8734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:23:09,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343397315] [2020-09-04 23:23:09,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:09,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-09-04 23:23:09,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505132303] [2020-09-04 23:23:09,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-09-04 23:23:09,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-09-04 23:23:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8329, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 23:23:09,909 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 93 states. [2020-09-04 23:23:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:43,152 INFO L93 Difference]: Finished difference Result 434 states and 435 transitions. [2020-09-04 23:23:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-09-04 23:23:43,155 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 413 [2020-09-04 23:23:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:43,158 INFO L225 Difference]: With dead ends: 434 [2020-09-04 23:23:43,158 INFO L226 Difference]: Without dead ends: 427 [2020-09-04 23:23:43,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=657, Invalid=31205, Unknown=0, NotChecked=0, Total=31862 [2020-09-04 23:23:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-09-04 23:23:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-09-04 23:23:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-09-04 23:23:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2020-09-04 23:23:43,285 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 413 [2020-09-04 23:23:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:43,285 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2020-09-04 23:23:43,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-09-04 23:23:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2020-09-04 23:23:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-09-04 23:23:43,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:43,288 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:43,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-09-04 23:23:43,288 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1803935402, now seen corresponding path program 46 times [2020-09-04 23:23:43,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:43,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267486764] [2020-09-04 23:23:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 45 proven. 9000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:23:47,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267486764] [2020-09-04 23:23:47,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:47,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-04 23:23:47,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894769494] [2020-09-04 23:23:47,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 23:23:47,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 23:23:47,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:23:47,950 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 49 states. [2020-09-04 23:23:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:54,206 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2020-09-04 23:23:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-09-04 23:23:54,210 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 420 [2020-09-04 23:23:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:54,213 INFO L225 Difference]: With dead ends: 448 [2020-09-04 23:23:54,213 INFO L226 Difference]: Without dead ends: 440 [2020-09-04 23:23:54,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:23:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-09-04 23:23:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 430. [2020-09-04 23:23:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-09-04 23:23:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2020-09-04 23:23:54,319 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 420 [2020-09-04 23:23:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:54,320 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2020-09-04 23:23:54,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 23:23:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2020-09-04 23:23:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-09-04 23:23:54,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:54,322 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:54,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-09-04 23:23:54,322 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash 206524889, now seen corresponding path program 44 times [2020-09-04 23:23:54,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:54,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348846482] [2020-09-04 23:23:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:05,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:24:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9135 backedges. 0 proven. 9135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:24:05,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348846482] [2020-09-04 23:24:05,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:24:05,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-09-04 23:24:05,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511284435] [2020-09-04 23:24:05,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-09-04 23:24:05,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:24:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-09-04 23:24:05,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=8698, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:24:05,978 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand 95 states. [2020-09-04 23:24:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:24:33,938 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2020-09-04 23:24:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-09-04 23:24:33,940 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 422 [2020-09-04 23:24:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:24:33,943 INFO L225 Difference]: With dead ends: 443 [2020-09-04 23:24:33,943 INFO L226 Difference]: Without dead ends: 436 [2020-09-04 23:24:33,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=672, Invalid=32634, Unknown=0, NotChecked=0, Total=33306 [2020-09-04 23:24:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-09-04 23:24:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-09-04 23:24:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-04 23:24:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-09-04 23:24:34,051 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 422 [2020-09-04 23:24:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:24:34,051 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-09-04 23:24:34,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-09-04 23:24:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-09-04 23:24:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-09-04 23:24:34,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:24:34,053 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:24:34,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-09-04 23:24:34,054 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:24:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:24:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash -863923968, now seen corresponding path program 47 times [2020-09-04 23:24:34,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:24:34,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581647597] [2020-09-04 23:24:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:24:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:24:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 46 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:24:37,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581647597] [2020-09-04 23:24:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:24:37,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:24:37,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33728567] [2020-09-04 23:24:37,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:24:37,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:24:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:24:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:24:37,544 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-09-04 23:24:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:24:42,310 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2020-09-04 23:24:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-09-04 23:24:42,313 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-09-04 23:24:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:24:42,315 INFO L225 Difference]: With dead ends: 457 [2020-09-04 23:24:42,315 INFO L226 Difference]: Without dead ends: 449 [2020-09-04 23:24:42,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 23:24:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-09-04 23:24:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-09-04 23:24:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-09-04 23:24:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-09-04 23:24:42,422 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-09-04 23:24:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:24:42,422 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-09-04 23:24:42,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:24:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-09-04 23:24:42,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-09-04 23:24:42,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:24:42,424 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:24:42,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-09-04 23:24:42,424 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:24:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:24:42,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1614380803, now seen corresponding path program 45 times [2020-09-04 23:24:42,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:24:42,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560428413] [2020-09-04 23:24:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:24:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:53,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:24:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:24:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9545 backedges. 0 proven. 9545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:24:53,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560428413] [2020-09-04 23:24:53,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:24:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-09-04 23:24:53,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843659126] [2020-09-04 23:24:53,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-09-04 23:24:53,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:24:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-09-04 23:24:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=9075, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 23:24:53,458 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 97 states. [2020-09-04 23:25:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:25:14,781 INFO L93 Difference]: Finished difference Result 452 states and 453 transitions. [2020-09-04 23:25:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-09-04 23:25:14,784 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 431 [2020-09-04 23:25:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:25:14,787 INFO L225 Difference]: With dead ends: 452 [2020-09-04 23:25:14,787 INFO L226 Difference]: Without dead ends: 445 [2020-09-04 23:25:14,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=687, Invalid=34095, Unknown=0, NotChecked=0, Total=34782 [2020-09-04 23:25:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-09-04 23:25:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-09-04 23:25:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-09-04 23:25:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2020-09-04 23:25:14,910 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 431 [2020-09-04 23:25:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:25:14,910 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2020-09-04 23:25:14,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-09-04 23:25:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2020-09-04 23:25:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-09-04 23:25:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:25:14,912 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:25:14,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-09-04 23:25:14,913 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:25:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:25:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1121181546, now seen corresponding path program 48 times [2020-09-04 23:25:14,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:25:14,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212719233] [2020-09-04 23:25:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:25:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:18,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:25:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 47 proven. 9823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:25:18,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212719233] [2020-09-04 23:25:18,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:25:18,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-04 23:25:18,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358337737] [2020-09-04 23:25:18,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-04 23:25:18,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:25:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-04 23:25:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:25:18,645 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand 51 states. [2020-09-04 23:25:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:25:24,012 INFO L93 Difference]: Finished difference Result 466 states and 468 transitions. [2020-09-04 23:25:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-09-04 23:25:24,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 438 [2020-09-04 23:25:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:25:24,018 INFO L225 Difference]: With dead ends: 466 [2020-09-04 23:25:24,018 INFO L226 Difference]: Without dead ends: 458 [2020-09-04 23:25:24,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 23:25:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-09-04 23:25:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2020-09-04 23:25:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-09-04 23:25:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2020-09-04 23:25:24,128 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 438 [2020-09-04 23:25:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:25:24,128 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2020-09-04 23:25:24,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-04 23:25:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2020-09-04 23:25:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-09-04 23:25:24,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:25:24,130 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:25:24,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-09-04 23:25:24,131 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:25:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:25:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash -797015783, now seen corresponding path program 46 times [2020-09-04 23:25:24,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:25:24,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125242525] [2020-09-04 23:25:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:25:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:36,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:25:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:25:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9964 backedges. 0 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:25:36,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125242525] [2020-09-04 23:25:36,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:25:36,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-09-04 23:25:36,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863624223] [2020-09-04 23:25:36,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-09-04 23:25:36,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:25:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-09-04 23:25:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9460, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 23:25:36,312 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand 99 states. [2020-09-04 23:26:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:26:05,758 INFO L93 Difference]: Finished difference Result 461 states and 462 transitions. [2020-09-04 23:26:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-09-04 23:26:05,762 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 440 [2020-09-04 23:26:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:26:05,765 INFO L225 Difference]: With dead ends: 461 [2020-09-04 23:26:05,766 INFO L226 Difference]: Without dead ends: 454 [2020-09-04 23:26:05,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=702, Invalid=35588, Unknown=0, NotChecked=0, Total=36290 [2020-09-04 23:26:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-09-04 23:26:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-09-04 23:26:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-09-04 23:26:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-09-04 23:26:05,911 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 440 [2020-09-04 23:26:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:26:05,911 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-09-04 23:26:05,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-09-04 23:26:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-09-04 23:26:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-09-04 23:26:05,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:26:05,914 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:26:05,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-09-04 23:26:05,914 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:26:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:26:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash 351975872, now seen corresponding path program 49 times [2020-09-04 23:26:05,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:26:05,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834435163] [2020-09-04 23:26:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:26:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:11,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:26:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 48 proven. 10248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:26:11,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834435163] [2020-09-04 23:26:11,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:26:11,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:26:11,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773095119] [2020-09-04 23:26:11,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:26:11,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:26:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:26:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:26:11,359 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 52 states. [2020-09-04 23:26:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:26:18,881 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2020-09-04 23:26:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-09-04 23:26:18,886 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 447 [2020-09-04 23:26:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:26:18,888 INFO L225 Difference]: With dead ends: 475 [2020-09-04 23:26:18,889 INFO L226 Difference]: Without dead ends: 467 [2020-09-04 23:26:18,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 23:26:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-09-04 23:26:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 457. [2020-09-04 23:26:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-09-04 23:26:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-09-04 23:26:19,007 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-09-04 23:26:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:26:19,008 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-09-04 23:26:19,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:26:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-09-04 23:26:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-04 23:26:19,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:26:19,010 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:26:19,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-09-04 23:26:19,011 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:26:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:26:19,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1863022531, now seen corresponding path program 47 times [2020-09-04 23:26:19,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:26:19,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961247685] [2020-09-04 23:26:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:26:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:26:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:26:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 10392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:26:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961247685] [2020-09-04 23:26:35,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:26:35,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-09-04 23:26:35,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573598707] [2020-09-04 23:26:35,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-09-04 23:26:35,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:26:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-09-04 23:26:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9853, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 23:26:35,284 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 101 states. [2020-09-04 23:27:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:27:23,277 INFO L93 Difference]: Finished difference Result 470 states and 471 transitions. [2020-09-04 23:27:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-09-04 23:27:23,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 449 [2020-09-04 23:27:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:27:23,283 INFO L225 Difference]: With dead ends: 470 [2020-09-04 23:27:23,283 INFO L226 Difference]: Without dead ends: 463 [2020-09-04 23:27:23,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=717, Invalid=37113, Unknown=0, NotChecked=0, Total=37830 [2020-09-04 23:27:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-09-04 23:27:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2020-09-04 23:27:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-09-04 23:27:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-09-04 23:27:23,404 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 449 [2020-09-04 23:27:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:27:23,404 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-09-04 23:27:23,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-09-04 23:27:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-09-04 23:27:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-04 23:27:23,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:27:23,407 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:27:23,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-09-04 23:27:23,407 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:27:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:27:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1651191850, now seen corresponding path program 50 times [2020-09-04 23:27:23,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:27:23,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983333362] [2020-09-04 23:27:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:27:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:27:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:27:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:27:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 49 proven. 10682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:27:28,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983333362] [2020-09-04 23:27:28,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:27:28,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-04 23:27:28,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170419377] [2020-09-04 23:27:28,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 23:27:28,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:27:28,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 23:27:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:27:28,999 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 53 states. [2020-09-04 23:27:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:27:36,540 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2020-09-04 23:27:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-09-04 23:27:36,545 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 456 [2020-09-04 23:27:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:27:36,548 INFO L225 Difference]: With dead ends: 484 [2020-09-04 23:27:36,548 INFO L226 Difference]: Without dead ends: 476 [2020-09-04 23:27:36,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 23:27:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-09-04 23:27:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 466. [2020-09-04 23:27:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-09-04 23:27:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2020-09-04 23:27:36,670 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 456 [2020-09-04 23:27:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:27:36,670 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2020-09-04 23:27:36,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 23:27:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2020-09-04 23:27:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-04 23:27:36,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:27:36,673 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:27:36,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-09-04 23:27:36,673 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:27:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:27:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 964190297, now seen corresponding path program 48 times [2020-09-04 23:27:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:27:36,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197181217] [2020-09-04 23:27:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:27:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat