/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-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:02:02,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:02:02,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:02:02,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:02:02,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:02:02,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:02:02,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:02:02,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:02:02,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:02:02,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:02:02,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:02:02,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:02:02,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:02:02,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:02:02,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:02:02,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:02:02,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:02:02,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:02:02,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:02:02,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:02:02,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:02:02,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:02:02,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:02:02,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:02:02,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:02:02,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:02:02,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:02:02,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:02:02,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:02:02,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:02:02,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:02:02,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:02:02,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:02:02,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:02:02,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:02:02,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:02:02,366 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:02:02,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:02:02,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:02:02,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:02:02,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:02:02,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:02:02,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:02:02,367 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 [2020-08-22 23:02:02,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:02:02,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:02:02,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:02:02,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:02:02,639 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:02:02,640 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 23:02:02,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde0c92d/762cd9b63a934602b23d9cad5dd34ac8/FLAGca821ff2e [2020-08-22 23:02:03,113 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:02:03,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 23:02:03,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde0c92d/762cd9b63a934602b23d9cad5dd34ac8/FLAGca821ff2e [2020-08-22 23:02:03,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abde0c92d/762cd9b63a934602b23d9cad5dd34ac8 [2020-08-22 23:02:03,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:02:03,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:02:03,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:03,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:02:03,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:02:03,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb559b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03, skipping insertion in model container [2020-08-22 23:02:03,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:02:03,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:02:03,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:03,804 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:02:03,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:02:03,849 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:02:03,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03 WrapperNode [2020-08-22 23:02:03,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:02:03,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:02:03,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:02:03,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:02:03,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... [2020-08-22 23:02:03,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:02:03,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:02:03,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:02:03,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:02:03,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:02:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:02:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:02:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:02:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:02:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:02:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:02:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:02:04,210 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:02:04,211 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:02:04,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:04 BoogieIcfgContainer [2020-08-22 23:02:04,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:02:04,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:02:04,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:02:04,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:02:04,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:02:03" (1/3) ... [2020-08-22 23:02:04,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dc5d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:04, skipping insertion in model container [2020-08-22 23:02:04,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:02:03" (2/3) ... [2020-08-22 23:02:04,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dc5d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:02:04, skipping insertion in model container [2020-08-22 23:02:04,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:02:04" (3/3) ... [2020-08-22 23:02:04,223 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-08-22 23:02:04,236 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:02:04,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:02:04,260 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:02:04,286 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:02:04,287 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:02:04,287 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:02:04,287 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:02:04,287 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:02:04,288 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:02:04,288 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:02:04,288 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:02:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-22 23:02:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:02:04,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:04,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:04,316 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-08-22 23:02:04,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:04,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031897263] [2020-08-22 23:02:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:04,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031897263] [2020-08-22 23:02:04,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:04,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:02:04,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858660630] [2020-08-22 23:02:04,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:02:04,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:02:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:02:04,552 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-08-22 23:02:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:04,643 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-08-22 23:02:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:02:04,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 23:02:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:04,654 INFO L225 Difference]: With dead ends: 45 [2020-08-22 23:02:04,654 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 23:02:04,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:02:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 23:02:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 23:02:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 23:02:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 23:02:04,697 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-08-22 23:02:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:04,697 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 23:02:04,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:02:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 23:02:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:02:04,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:04,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:04,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:02:04,700 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:04,700 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-08-22 23:02:04,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:04,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323017346] [2020-08-22 23:02:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:04,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323017346] [2020-08-22 23:02:04,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:02:04,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 23:02:04,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052951242] [2020-08-22 23:02:04,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 23:02:04,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:04,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 23:02:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:02:04,791 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-08-22 23:02:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:04,857 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 23:02:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 23:02:04,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-22 23:02:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:04,859 INFO L225 Difference]: With dead ends: 31 [2020-08-22 23:02:04,859 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 23:02:04,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 23:02:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 23:02:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-22 23:02:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 23:02:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 23:02:04,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-08-22 23:02:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:04,870 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 23:02:04,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 23:02:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 23:02:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 23:02:04,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:04,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:04,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:02:04,872 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-08-22 23:02:04,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:04,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756125045] [2020-08-22 23:02:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:04,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756125045] [2020-08-22 23:02:04,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:04,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:02:04,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708841349] [2020-08-22 23:02:04,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:02:04,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:02:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:02:04,978 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-08-22 23:02:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:05,065 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 23:02:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:02:05,065 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-22 23:02:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:05,066 INFO L225 Difference]: With dead ends: 36 [2020-08-22 23:02:05,067 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 23:02:05,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 23:02:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-22 23:02:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 23:02:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 23:02:05,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-08-22 23:02:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:05,076 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 23:02:05,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:02:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 23:02:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 23:02:05,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:05,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:02:05,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-08-22 23:02:05,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256237987] [2020-08-22 23:02:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:05,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256237987] [2020-08-22 23:02:05,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:05,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:02:05,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295240574] [2020-08-22 23:02:05,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:02:05,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:02:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:02:05,173 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-08-22 23:02:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:05,311 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-08-22 23:02:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:02:05,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 23:02:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:05,313 INFO L225 Difference]: With dead ends: 41 [2020-08-22 23:02:05,313 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 23:02:05,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 23:02:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-08-22 23:02:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 23:02:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-22 23:02:05,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-08-22 23:02:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:05,323 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-22 23:02:05,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:02:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-22 23:02:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:02:05,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,324 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:05,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:02:05,325 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-08-22 23:02:05,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811628465] [2020-08-22 23:02:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:05,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811628465] [2020-08-22 23:02:05,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:05,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:02:05,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470607138] [2020-08-22 23:02:05,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:02:05,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:02:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:02:05,450 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-08-22 23:02:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:05,584 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-08-22 23:02:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:02:05,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-08-22 23:02:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:05,586 INFO L225 Difference]: With dead ends: 46 [2020-08-22 23:02:05,586 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 23:02:05,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:02:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 23:02:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-08-22 23:02:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:02:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 23:02:05,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-08-22 23:02:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:05,595 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 23:02:05,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:02:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 23:02:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 23:02:05,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,596 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:05,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:02:05,597 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-08-22 23:02:05,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433311054] [2020-08-22 23:02:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:05,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433311054] [2020-08-22 23:02:05,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:05,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:02:05,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494585049] [2020-08-22 23:02:05,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:02:05,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:02:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:02:05,717 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-08-22 23:02:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:05,895 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-22 23:02:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:02:05,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-08-22 23:02:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:05,896 INFO L225 Difference]: With dead ends: 51 [2020-08-22 23:02:05,896 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 23:02:05,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:02:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 23:02:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-08-22 23:02:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:02:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-08-22 23:02:05,905 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-08-22 23:02:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:05,905 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-08-22 23:02:05,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:02:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-08-22 23:02:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:02:05,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:05,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:05,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:02:05,907 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-08-22 23:02:05,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:05,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797100602] [2020-08-22 23:02:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:06,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797100602] [2020-08-22 23:02:06,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:02:06,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416468595] [2020-08-22 23:02:06,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:02:06,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:02:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:02:06,064 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-08-22 23:02:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,264 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-08-22 23:02:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:02:06,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-22 23:02:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,265 INFO L225 Difference]: With dead ends: 56 [2020-08-22 23:02:06,266 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 23:02:06,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:02:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 23:02:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 23:02:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 23:02:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 23:02:06,274 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-08-22 23:02:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,274 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 23:02:06,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:02:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 23:02:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 23:02:06,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,276 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:02:06,276 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-08-22 23:02:06,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339717408] [2020-08-22 23:02:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:06,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339717408] [2020-08-22 23:02:06,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:02:06,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745920828] [2020-08-22 23:02:06,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:02:06,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:02:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:02:06,458 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-08-22 23:02:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:06,724 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-08-22 23:02:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:02:06,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-22 23:02:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:06,726 INFO L225 Difference]: With dead ends: 61 [2020-08-22 23:02:06,726 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 23:02:06,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:02:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 23:02:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-08-22 23:02:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 23:02:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-08-22 23:02:06,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-08-22 23:02:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:06,735 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-08-22 23:02:06,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:02:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-08-22 23:02:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:02:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:06,736 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:06,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:02:06,736 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-08-22 23:02:06,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:06,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97924626] [2020-08-22 23:02:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:06,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97924626] [2020-08-22 23:02:06,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:06,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:02:06,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642625739] [2020-08-22 23:02:06,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:02:06,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:02:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:02:06,946 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-08-22 23:02:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,278 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-08-22 23:02:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:02:07,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-08-22 23:02:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,280 INFO L225 Difference]: With dead ends: 66 [2020-08-22 23:02:07,280 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 23:02:07,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:02:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 23:02:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-08-22 23:02:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 23:02:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 23:02:07,290 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-08-22 23:02:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,290 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 23:02:07,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:02:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 23:02:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 23:02:07,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,291 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:07,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:02:07,292 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-08-22 23:02:07,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987740474] [2020-08-22 23:02:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:07,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987740474] [2020-08-22 23:02:07,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:07,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:02:07,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715174981] [2020-08-22 23:02:07,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:02:07,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:02:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:02:07,507 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-08-22 23:02:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:07,861 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-08-22 23:02:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 23:02:07,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-22 23:02:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:07,862 INFO L225 Difference]: With dead ends: 71 [2020-08-22 23:02:07,862 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 23:02:07,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:02:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 23:02:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-08-22 23:02:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 23:02:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-08-22 23:02:07,881 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-08-22 23:02:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:07,881 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-08-22 23:02:07,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:02:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-08-22 23:02:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 23:02:07,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:07,887 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:07,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:02:07,887 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-08-22 23:02:07,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:07,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149106605] [2020-08-22 23:02:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:08,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149106605] [2020-08-22 23:02:08,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:08,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:02:08,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149662420] [2020-08-22 23:02:08,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:02:08,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:02:08,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:02:08,167 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-08-22 23:02:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:08,615 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-08-22 23:02:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:02:08,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-08-22 23:02:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:08,616 INFO L225 Difference]: With dead ends: 76 [2020-08-22 23:02:08,617 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 23:02:08,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:02:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 23:02:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-08-22 23:02:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 23:02:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 23:02:08,627 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-08-22 23:02:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:08,627 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 23:02:08,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:02:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 23:02:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 23:02:08,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:08,629 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:08,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:02:08,629 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-08-22 23:02:08,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:08,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301856199] [2020-08-22 23:02:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:08,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301856199] [2020-08-22 23:02:08,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:08,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:02:08,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212753290] [2020-08-22 23:02:08,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:02:08,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:02:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:02:08,911 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-08-22 23:02:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:09,402 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-08-22 23:02:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 23:02:09,403 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-08-22 23:02:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:09,403 INFO L225 Difference]: With dead ends: 81 [2020-08-22 23:02:09,404 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 23:02:09,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:02:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 23:02:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-08-22 23:02:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 23:02:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-08-22 23:02:09,413 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-08-22 23:02:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:09,414 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-08-22 23:02:09,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:02:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-08-22 23:02:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 23:02:09,415 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:09,415 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:09,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:02:09,416 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-08-22 23:02:09,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:09,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811417653] [2020-08-22 23:02:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:09,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811417653] [2020-08-22 23:02:09,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:09,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:02:09,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785926291] [2020-08-22 23:02:09,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:02:09,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:02:09,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:02:09,765 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-08-22 23:02:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:10,305 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-22 23:02:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 23:02:10,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-08-22 23:02:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:10,307 INFO L225 Difference]: With dead ends: 86 [2020-08-22 23:02:10,307 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 23:02:10,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:02:10,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 23:02:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-08-22 23:02:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 23:02:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-08-22 23:02:10,316 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-08-22 23:02:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:10,316 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-08-22 23:02:10,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:02:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-08-22 23:02:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 23:02:10,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:10,318 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:10,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:02:10,318 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-08-22 23:02:10,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:10,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214502028] [2020-08-22 23:02:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:10,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:10,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214502028] [2020-08-22 23:02:10,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:10,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 23:02:10,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27786798] [2020-08-22 23:02:10,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 23:02:10,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 23:02:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:02:10,745 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-08-22 23:02:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:11,360 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-08-22 23:02:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 23:02:11,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-08-22 23:02:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:11,361 INFO L225 Difference]: With dead ends: 91 [2020-08-22 23:02:11,361 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 23:02:11,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:02:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 23:02:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-08-22 23:02:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 23:02:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-08-22 23:02:11,370 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-08-22 23:02:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:11,370 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-08-22 23:02:11,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 23:02:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-08-22 23:02:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 23:02:11,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:11,371 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:11,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:02:11,372 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-08-22 23:02:11,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:11,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021242859] [2020-08-22 23:02:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:11,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021242859] [2020-08-22 23:02:11,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:11,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:02:11,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416303017] [2020-08-22 23:02:11,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:02:11,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:02:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:02:11,783 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-08-22 23:02:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:12,423 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-08-22 23:02:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 23:02:12,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-08-22 23:02:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:12,425 INFO L225 Difference]: With dead ends: 96 [2020-08-22 23:02:12,425 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 23:02:12,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:02:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 23:02:12,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-08-22 23:02:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 23:02:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-08-22 23:02:12,434 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-08-22 23:02:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:12,434 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-08-22 23:02:12,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:02:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-08-22 23:02:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 23:02:12,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:12,436 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:12,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:02:12,436 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-08-22 23:02:12,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:12,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292519563] [2020-08-22 23:02:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:12,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:12,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292519563] [2020-08-22 23:02:12,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:12,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:02:12,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903367677] [2020-08-22 23:02:12,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:02:12,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:12,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:02:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:02:12,944 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-08-22 23:02:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:13,687 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-08-22 23:02:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 23:02:13,688 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-08-22 23:02:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:13,689 INFO L225 Difference]: With dead ends: 101 [2020-08-22 23:02:13,690 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 23:02:13,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:02:13,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 23:02:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-08-22 23:02:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 23:02:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-08-22 23:02:13,712 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-08-22 23:02:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:13,712 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-08-22 23:02:13,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:02:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-08-22 23:02:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 23:02:13,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:13,717 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:13,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:02:13,717 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-08-22 23:02:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:13,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66455781] [2020-08-22 23:02:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:14,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:14,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66455781] [2020-08-22 23:02:14,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:14,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 23:02:14,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517365902] [2020-08-22 23:02:14,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 23:02:14,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 23:02:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 23:02:14,245 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-08-22 23:02:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:15,142 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-08-22 23:02:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 23:02:15,142 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-08-22 23:02:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:15,143 INFO L225 Difference]: With dead ends: 106 [2020-08-22 23:02:15,144 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 23:02:15,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:02:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 23:02:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-08-22 23:02:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 23:02:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-22 23:02:15,153 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-08-22 23:02:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:15,154 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-22 23:02:15,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 23:02:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-22 23:02:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 23:02:15,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:15,156 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:15,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:02:15,157 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-08-22 23:02:15,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:15,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46829346] [2020-08-22 23:02:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:15,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:15,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46829346] [2020-08-22 23:02:15,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:15,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:02:15,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519658510] [2020-08-22 23:02:15,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:02:15,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:02:15,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:02:15,822 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-08-22 23:02:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:16,914 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-08-22 23:02:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 23:02:16,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-08-22 23:02:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:16,916 INFO L225 Difference]: With dead ends: 111 [2020-08-22 23:02:16,916 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 23:02:16,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:02:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 23:02:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-08-22 23:02:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 23:02:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-08-22 23:02:16,925 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-08-22 23:02:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:16,926 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-08-22 23:02:16,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:02:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-08-22 23:02:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 23:02:16,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:16,930 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:16,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:02:16,931 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:16,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-08-22 23:02:16,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:16,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410015308] [2020-08-22 23:02:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:17,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:17,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410015308] [2020-08-22 23:02:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 23:02:17,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498089530] [2020-08-22 23:02:17,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 23:02:17,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 23:02:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 23:02:17,656 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-08-22 23:02:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:18,610 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-08-22 23:02:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 23:02:18,611 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-08-22 23:02:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:18,612 INFO L225 Difference]: With dead ends: 116 [2020-08-22 23:02:18,612 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 23:02:18,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:02:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 23:02:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-08-22 23:02:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 23:02:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-08-22 23:02:18,620 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-08-22 23:02:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:18,621 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-08-22 23:02:18,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 23:02:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-08-22 23:02:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 23:02:18,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:18,622 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:18,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:02:18,622 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-08-22 23:02:18,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:18,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632784601] [2020-08-22 23:02:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:19,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:19,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632784601] [2020-08-22 23:02:19,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:19,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:02:19,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680951828] [2020-08-22 23:02:19,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:02:19,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:02:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:02:19,289 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-08-22 23:02:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:20,454 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-08-22 23:02:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 23:02:20,455 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-08-22 23:02:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:20,456 INFO L225 Difference]: With dead ends: 121 [2020-08-22 23:02:20,456 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 23:02:20,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:02:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 23:02:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-08-22 23:02:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 23:02:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-08-22 23:02:20,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-08-22 23:02:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:20,465 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-08-22 23:02:20,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:02:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-08-22 23:02:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-22 23:02:20,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:20,466 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:20,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:02:20,466 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-08-22 23:02:20,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:20,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045723588] [2020-08-22 23:02:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:21,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:21,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045723588] [2020-08-22 23:02:21,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:21,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 23:02:21,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190929877] [2020-08-22 23:02:21,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 23:02:21,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 23:02:21,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 23:02:21,184 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-08-22 23:02:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:22,384 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-08-22 23:02:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 23:02:22,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-08-22 23:02:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:22,387 INFO L225 Difference]: With dead ends: 126 [2020-08-22 23:02:22,387 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 23:02:22,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:02:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 23:02:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-08-22 23:02:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 23:02:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-08-22 23:02:22,394 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-08-22 23:02:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:22,394 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-08-22 23:02:22,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 23:02:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-08-22 23:02:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 23:02:22,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:22,396 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:22,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:02:22,396 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-08-22 23:02:22,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:22,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894237835] [2020-08-22 23:02:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:23,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894237835] [2020-08-22 23:02:23,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:23,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:02:23,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371760984] [2020-08-22 23:02:23,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:02:23,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:02:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:02:23,171 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-08-22 23:02:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:24,539 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-08-22 23:02:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-08-22 23:02:24,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-08-22 23:02:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:24,543 INFO L225 Difference]: With dead ends: 131 [2020-08-22 23:02:24,543 INFO L226 Difference]: Without dead ends: 125 [2020-08-22 23:02:24,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:02:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-22 23:02:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-08-22 23:02:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 23:02:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-08-22 23:02:24,554 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-08-22 23:02:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:24,555 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-08-22 23:02:24,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:02:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-08-22 23:02:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 23:02:24,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:24,557 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:24,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:02:24,557 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:24,558 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-08-22 23:02:24,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:24,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924556994] [2020-08-22 23:02:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924556994] [2020-08-22 23:02:25,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:25,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 23:02:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287759050] [2020-08-22 23:02:25,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 23:02:25,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 23:02:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:02:25,433 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-08-22 23:02:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:26,895 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-08-22 23:02:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 23:02:26,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-08-22 23:02:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:26,897 INFO L225 Difference]: With dead ends: 136 [2020-08-22 23:02:26,898 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 23:02:26,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:02:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 23:02:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-08-22 23:02:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 23:02:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-08-22 23:02:26,905 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-08-22 23:02:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:26,905 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-08-22 23:02:26,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 23:02:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-08-22 23:02:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 23:02:26,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:26,906 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:26,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:02:26,907 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-08-22 23:02:26,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:26,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852987301] [2020-08-22 23:02:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:27,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852987301] [2020-08-22 23:02:27,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:27,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:02:27,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083646140] [2020-08-22 23:02:27,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:02:27,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:02:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:02:27,825 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-08-22 23:02:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:29,433 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-08-22 23:02:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-08-22 23:02:29,434 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-08-22 23:02:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:29,436 INFO L225 Difference]: With dead ends: 141 [2020-08-22 23:02:29,437 INFO L226 Difference]: Without dead ends: 135 [2020-08-22 23:02:29,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:02:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-22 23:02:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-08-22 23:02:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 23:02:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-08-22 23:02:29,445 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-08-22 23:02:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:29,446 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-08-22 23:02:29,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:02:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-08-22 23:02:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 23:02:29,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:29,448 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:29,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:02:29,450 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-08-22 23:02:29,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:29,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155192766] [2020-08-22 23:02:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:30,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155192766] [2020-08-22 23:02:30,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:30,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 23:02:30,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959250367] [2020-08-22 23:02:30,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 23:02:30,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 23:02:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 23:02:30,514 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-08-22 23:02:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:32,232 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-08-22 23:02:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 23:02:32,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-08-22 23:02:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:32,233 INFO L225 Difference]: With dead ends: 146 [2020-08-22 23:02:32,234 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 23:02:32,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 23:02:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 23:02:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-08-22 23:02:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 23:02:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-08-22 23:02:32,242 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-08-22 23:02:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:32,242 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-08-22 23:02:32,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 23:02:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-08-22 23:02:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 23:02:32,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:32,244 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:32,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:02:32,244 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-08-22 23:02:32,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:32,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052034645] [2020-08-22 23:02:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:33,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:33,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052034645] [2020-08-22 23:02:33,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:33,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:02:33,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039782717] [2020-08-22 23:02:33,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:02:33,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:02:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:02:33,453 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-08-22 23:02:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:35,321 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-08-22 23:02:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-08-22 23:02:35,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-08-22 23:02:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:35,323 INFO L225 Difference]: With dead ends: 151 [2020-08-22 23:02:35,323 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 23:02:35,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:02:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 23:02:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-08-22 23:02:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-22 23:02:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-08-22 23:02:35,334 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-08-22 23:02:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:35,334 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-08-22 23:02:35,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:02:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-08-22 23:02:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 23:02:35,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:35,337 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:35,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:02:35,337 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-08-22 23:02:35,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:35,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464912125] [2020-08-22 23:02:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:36,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:36,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464912125] [2020-08-22 23:02:36,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:36,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 23:02:36,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146652971] [2020-08-22 23:02:36,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 23:02:36,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 23:02:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 23:02:36,560 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-08-22 23:02:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:38,495 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-08-22 23:02:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 23:02:38,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-08-22 23:02:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:38,497 INFO L225 Difference]: With dead ends: 156 [2020-08-22 23:02:38,497 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 23:02:38,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 23:02:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 23:02:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-08-22 23:02:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 23:02:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-08-22 23:02:38,504 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-08-22 23:02:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:38,505 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-08-22 23:02:38,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 23:02:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-08-22 23:02:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 23:02:38,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:38,506 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:38,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:02:38,506 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-08-22 23:02:38,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:38,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669488435] [2020-08-22 23:02:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:39,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:39,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669488435] [2020-08-22 23:02:39,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:39,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 23:02:39,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167558606] [2020-08-22 23:02:39,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 23:02:39,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 23:02:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:02:39,772 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-08-22 23:02:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:41,852 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-08-22 23:02:41,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-08-22 23:02:41,853 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-08-22 23:02:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:41,855 INFO L225 Difference]: With dead ends: 161 [2020-08-22 23:02:41,855 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 23:02:41,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 23:02:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 23:02:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-08-22 23:02:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 23:02:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-08-22 23:02:41,863 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-08-22 23:02:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:41,863 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-08-22 23:02:41,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 23:02:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-08-22 23:02:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 23:02:41,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:41,864 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:41,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:02:41,865 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-08-22 23:02:41,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:41,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556444159] [2020-08-22 23:02:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:43,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:43,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556444159] [2020-08-22 23:02:43,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:43,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-22 23:02:43,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329959743] [2020-08-22 23:02:43,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 23:02:43,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 23:02:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 23:02:43,245 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-08-22 23:02:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:45,571 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-08-22 23:02:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 23:02:45,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-08-22 23:02:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:45,573 INFO L225 Difference]: With dead ends: 166 [2020-08-22 23:02:45,573 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 23:02:45,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 23:02:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 23:02:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-08-22 23:02:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 23:02:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-08-22 23:02:45,581 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-08-22 23:02:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:45,581 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-08-22 23:02:45,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 23:02:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-08-22 23:02:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 23:02:45,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:45,582 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:45,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:02:45,583 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:45,583 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-08-22 23:02:45,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:45,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94357553] [2020-08-22 23:02:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:47,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:47,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94357553] [2020-08-22 23:02:47,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:47,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 23:02:47,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759927841] [2020-08-22 23:02:47,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 23:02:47,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 23:02:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:02:47,085 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-08-22 23:02:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:49,583 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-08-22 23:02:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-08-22 23:02:49,584 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-08-22 23:02:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:49,586 INFO L225 Difference]: With dead ends: 171 [2020-08-22 23:02:49,586 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 23:02:49,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 23:02:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 23:02:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-08-22 23:02:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 23:02:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-08-22 23:02:49,594 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-08-22 23:02:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:49,594 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-08-22 23:02:49,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 23:02:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-08-22 23:02:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-22 23:02:49,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:49,596 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:49,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:02:49,596 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:49,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-08-22 23:02:49,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:49,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460269593] [2020-08-22 23:02:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:51,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:51,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460269593] [2020-08-22 23:02:51,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:51,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-08-22 23:02:51,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046786417] [2020-08-22 23:02:51,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 23:02:51,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 23:02:51,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 23:02:51,218 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-08-22 23:02:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:53,875 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-08-22 23:02:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 23:02:53,875 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-08-22 23:02:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:53,877 INFO L225 Difference]: With dead ends: 176 [2020-08-22 23:02:53,877 INFO L226 Difference]: Without dead ends: 170 [2020-08-22 23:02:53,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 23:02:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-08-22 23:02:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-08-22 23:02:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 23:02:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-08-22 23:02:53,885 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-08-22 23:02:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:53,886 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-08-22 23:02:53,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 23:02:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-08-22 23:02:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 23:02:53,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:53,887 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:53,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:02:53,887 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:53,888 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-08-22 23:02:53,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:53,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873880865] [2020-08-22 23:02:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:55,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:02:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:02:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:02:55,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873880865] [2020-08-22 23:02:55,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:02:55,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-08-22 23:02:55,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135631566] [2020-08-22 23:02:55,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 23:02:55,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:02:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 23:02:55,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:02:55,643 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-08-22 23:02:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:02:58,399 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-08-22 23:02:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-08-22 23:02:58,400 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-08-22 23:02:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:02:58,402 INFO L225 Difference]: With dead ends: 181 [2020-08-22 23:02:58,402 INFO L226 Difference]: Without dead ends: 175 [2020-08-22 23:02:58,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 23:02:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-22 23:02:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-08-22 23:02:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-22 23:02:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-08-22 23:02:58,408 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-08-22 23:02:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:02:58,409 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-08-22 23:02:58,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 23:02:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-08-22 23:02:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-08-22 23:02:58,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:02:58,410 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:02:58,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:02:58,410 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:02:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:02:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-08-22 23:02:58,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:02:58,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219231559] [2020-08-22 23:02:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:02:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219231559] [2020-08-22 23:03:00,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:00,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-08-22 23:03:00,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389092959] [2020-08-22 23:03:00,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 23:03:00,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 23:03:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 23:03:00,250 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-08-22 23:03:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:03,190 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-08-22 23:03:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 23:03:03,190 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-08-22 23:03:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:03,192 INFO L225 Difference]: With dead ends: 186 [2020-08-22 23:03:03,192 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 23:03:03,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-08-22 23:03:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 23:03:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-08-22 23:03:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 23:03:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-08-22 23:03:03,203 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-08-22 23:03:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:03,204 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-08-22 23:03:03,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 23:03:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-08-22 23:03:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 23:03:03,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:03,207 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:03,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:03:03,207 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-08-22 23:03:03,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:03,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986130147] [2020-08-22 23:03:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:05,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:05,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986130147] [2020-08-22 23:03:05,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:05,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-08-22 23:03:05,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21982948] [2020-08-22 23:03:05,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 23:03:05,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:05,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 23:03:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:03:05,221 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-08-22 23:03:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:08,446 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-08-22 23:03:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-08-22 23:03:08,446 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-08-22 23:03:08,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:08,448 INFO L225 Difference]: With dead ends: 191 [2020-08-22 23:03:08,449 INFO L226 Difference]: Without dead ends: 185 [2020-08-22 23:03:08,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-08-22 23:03:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-22 23:03:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-08-22 23:03:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 23:03:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-08-22 23:03:08,456 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-08-22 23:03:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:08,456 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-08-22 23:03:08,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 23:03:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-08-22 23:03:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 23:03:08,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:08,457 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:08,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:03:08,458 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:08,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-08-22 23:03:08,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:08,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886956353] [2020-08-22 23:03:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:10,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:10,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886956353] [2020-08-22 23:03:10,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:10,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-08-22 23:03:10,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362398520] [2020-08-22 23:03:10,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 23:03:10,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 23:03:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 23:03:10,640 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-08-22 23:03:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:14,125 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-08-22 23:03:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 23:03:14,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-08-22 23:03:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:14,128 INFO L225 Difference]: With dead ends: 196 [2020-08-22 23:03:14,128 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 23:03:14,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-08-22 23:03:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 23:03:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-08-22 23:03:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-08-22 23:03:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-08-22 23:03:14,137 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-08-22 23:03:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:14,137 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-08-22 23:03:14,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 23:03:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-08-22 23:03:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 23:03:14,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:14,149 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:14,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:03:14,150 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:14,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-08-22 23:03:14,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:14,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904266277] [2020-08-22 23:03:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:16,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:16,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904266277] [2020-08-22 23:03:16,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:16,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-08-22 23:03:16,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146190348] [2020-08-22 23:03:16,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 23:03:16,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 23:03:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:03:16,395 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-08-22 23:03:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:20,073 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-08-22 23:03:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-08-22 23:03:20,074 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-08-22 23:03:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:20,076 INFO L225 Difference]: With dead ends: 201 [2020-08-22 23:03:20,076 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 23:03:20,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-08-22 23:03:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 23:03:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-08-22 23:03:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 23:03:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-08-22 23:03:20,084 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-08-22 23:03:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:20,085 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-08-22 23:03:20,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 23:03:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-08-22 23:03:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-22 23:03:20,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:20,086 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:20,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:03:20,087 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:20,087 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-08-22 23:03:20,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:20,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680235396] [2020-08-22 23:03:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:22,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:22,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680235396] [2020-08-22 23:03:22,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:22,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-08-22 23:03:22,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919741519] [2020-08-22 23:03:22,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 23:03:22,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 23:03:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 23:03:22,502 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-08-22 23:03:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:26,394 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-08-22 23:03:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-08-22 23:03:26,395 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-08-22 23:03:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:26,396 INFO L225 Difference]: With dead ends: 206 [2020-08-22 23:03:26,396 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 23:03:26,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-08-22 23:03:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 23:03:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-08-22 23:03:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 23:03:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-08-22 23:03:26,404 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-08-22 23:03:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:26,405 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-08-22 23:03:26,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 23:03:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-08-22 23:03:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 23:03:26,406 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:26,406 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:26,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:03:26,406 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-08-22 23:03:26,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:26,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268455505] [2020-08-22 23:03:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:28,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:28,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268455505] [2020-08-22 23:03:28,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:28,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-08-22 23:03:28,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419806882] [2020-08-22 23:03:28,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 23:03:28,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:28,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 23:03:28,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:03:28,972 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-08-22 23:03:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:33,069 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-08-22 23:03:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-08-22 23:03:33,071 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-08-22 23:03:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:33,073 INFO L225 Difference]: With dead ends: 211 [2020-08-22 23:03:33,073 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 23:03:33,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-08-22 23:03:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 23:03:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-08-22 23:03:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-22 23:03:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-08-22 23:03:33,080 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-08-22 23:03:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:33,080 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-08-22 23:03:33,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 23:03:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-08-22 23:03:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-22 23:03:33,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:33,082 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:33,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:03:33,082 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-08-22 23:03:33,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:33,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155072153] [2020-08-22 23:03:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:35,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155072153] [2020-08-22 23:03:35,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:35,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-08-22 23:03:35,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098560458] [2020-08-22 23:03:35,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 23:03:35,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 23:03:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 23:03:35,807 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-08-22 23:03:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:40,274 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-08-22 23:03:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-08-22 23:03:40,275 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-08-22 23:03:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:40,276 INFO L225 Difference]: With dead ends: 216 [2020-08-22 23:03:40,276 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 23:03:40,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-08-22 23:03:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 23:03:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-08-22 23:03:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 23:03:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-08-22 23:03:40,283 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-08-22 23:03:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:40,283 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-08-22 23:03:40,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 23:03:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-08-22 23:03:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 23:03:40,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:40,285 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:40,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:03:40,285 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-08-22 23:03:40,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:40,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465760798] [2020-08-22 23:03:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:43,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:43,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465760798] [2020-08-22 23:03:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-08-22 23:03:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926963762] [2020-08-22 23:03:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 23:03:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 23:03:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:03:43,189 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-08-22 23:03:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:47,949 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-08-22 23:03:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-08-22 23:03:47,950 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-08-22 23:03:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:47,952 INFO L225 Difference]: With dead ends: 221 [2020-08-22 23:03:47,952 INFO L226 Difference]: Without dead ends: 215 [2020-08-22 23:03:47,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-08-22 23:03:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-08-22 23:03:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-08-22 23:03:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 23:03:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-08-22 23:03:47,960 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-08-22 23:03:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:47,960 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-08-22 23:03:47,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 23:03:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-08-22 23:03:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-08-22 23:03:47,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:47,962 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:47,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:03:47,962 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-08-22 23:03:47,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:47,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518611599] [2020-08-22 23:03:47,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:51,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:51,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518611599] [2020-08-22 23:03:51,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:51,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-08-22 23:03:51,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100968906] [2020-08-22 23:03:51,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 23:03:51,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 23:03:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 23:03:51,296 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-08-22 23:03:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:03:56,364 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-08-22 23:03:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-08-22 23:03:56,365 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-08-22 23:03:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:03:56,366 INFO L225 Difference]: With dead ends: 226 [2020-08-22 23:03:56,366 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 23:03:56,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-08-22 23:03:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 23:03:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-08-22 23:03:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-08-22 23:03:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-08-22 23:03:56,376 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-08-22 23:03:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:03:56,376 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-08-22 23:03:56,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 23:03:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-08-22 23:03:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 23:03:56,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:03:56,378 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:03:56,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:03:56,378 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:03:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:03:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-08-22 23:03:56,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:03:56,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998171526] [2020-08-22 23:03:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:03:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:59,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:03:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:03:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:03:59,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998171526] [2020-08-22 23:03:59,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:03:59,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-08-22 23:03:59,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240031151] [2020-08-22 23:03:59,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 23:03:59,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:03:59,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 23:03:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:03:59,712 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-08-22 23:04:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:05,018 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-08-22 23:04:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-08-22 23:04:05,019 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-08-22 23:04:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:05,020 INFO L225 Difference]: With dead ends: 231 [2020-08-22 23:04:05,020 INFO L226 Difference]: Without dead ends: 225 [2020-08-22 23:04:05,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-08-22 23:04:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-22 23:04:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-08-22 23:04:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:04:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-08-22 23:04:05,027 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-08-22 23:04:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:05,027 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-08-22 23:04:05,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 23:04:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-08-22 23:04:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-08-22 23:04:05,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:05,028 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:05,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:04:05,028 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-08-22 23:04:05,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:05,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127966163] [2020-08-22 23:04:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:08,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:08,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127966163] [2020-08-22 23:04:08,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:08,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-08-22 23:04:08,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783477771] [2020-08-22 23:04:08,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 23:04:08,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:08,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 23:04:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 23:04:08,604 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-08-22 23:04:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:14,321 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-08-22 23:04:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-08-22 23:04:14,322 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-08-22 23:04:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:14,324 INFO L225 Difference]: With dead ends: 236 [2020-08-22 23:04:14,324 INFO L226 Difference]: Without dead ends: 230 [2020-08-22 23:04:14,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-08-22 23:04:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-08-22 23:04:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-08-22 23:04:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-22 23:04:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-08-22 23:04:14,333 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-08-22 23:04:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:14,333 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-08-22 23:04:14,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 23:04:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-08-22 23:04:14,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-08-22 23:04:14,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:14,335 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:14,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:04:14,335 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-08-22 23:04:14,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:14,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483420729] [2020-08-22 23:04:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:18,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483420729] [2020-08-22 23:04:18,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:18,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-08-22 23:04:18,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209539701] [2020-08-22 23:04:18,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 23:04:18,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 23:04:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:04:18,119 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-08-22 23:04:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:24,213 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-08-22 23:04:24,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-08-22 23:04:24,215 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-08-22 23:04:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:24,216 INFO L225 Difference]: With dead ends: 241 [2020-08-22 23:04:24,216 INFO L226 Difference]: Without dead ends: 235 [2020-08-22 23:04:24,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-08-22 23:04:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-22 23:04:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-08-22 23:04:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 23:04:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-08-22 23:04:24,224 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-08-22 23:04:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:24,225 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-08-22 23:04:24,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 23:04:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-08-22 23:04:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-08-22 23:04:24,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:24,226 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:24,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:04:24,227 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:24,227 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-08-22 23:04:24,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:24,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054835124] [2020-08-22 23:04:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:28,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054835124] [2020-08-22 23:04:28,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:28,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-08-22 23:04:28,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855576005] [2020-08-22 23:04:28,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 23:04:28,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:28,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 23:04:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 23:04:28,237 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-08-22 23:04:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:34,517 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-08-22 23:04:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-08-22 23:04:34,518 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-08-22 23:04:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:34,520 INFO L225 Difference]: With dead ends: 246 [2020-08-22 23:04:34,521 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 23:04:34,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-08-22 23:04:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 23:04:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-08-22 23:04:34,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-22 23:04:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-08-22 23:04:34,528 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-08-22 23:04:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:34,529 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-08-22 23:04:34,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 23:04:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-08-22 23:04:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 23:04:34,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:34,531 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:34,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:04:34,531 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-08-22 23:04:34,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:34,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144927378] [2020-08-22 23:04:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:38,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144927378] [2020-08-22 23:04:38,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:38,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-08-22 23:04:38,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327442672] [2020-08-22 23:04:38,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 23:04:38,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:38,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 23:04:38,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:04:38,812 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-08-22 23:04:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:45,676 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-08-22 23:04:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-08-22 23:04:45,677 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-08-22 23:04:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:45,679 INFO L225 Difference]: With dead ends: 251 [2020-08-22 23:04:45,679 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 23:04:45,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-08-22 23:04:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 23:04:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-08-22 23:04:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-22 23:04:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-08-22 23:04:45,687 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-08-22 23:04:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:45,687 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-08-22 23:04:45,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 23:04:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-08-22 23:04:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 23:04:45,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:45,689 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:45,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:04:45,690 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:45,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-08-22 23:04:45,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:45,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940786678] [2020-08-22 23:04:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:50,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940786678] [2020-08-22 23:04:50,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:50,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-08-22 23:04:50,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511596410] [2020-08-22 23:04:50,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 23:04:50,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 23:04:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 23:04:50,312 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-08-22 23:04:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:57,656 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-08-22 23:04:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-08-22 23:04:57,657 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-08-22 23:04:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:57,659 INFO L225 Difference]: With dead ends: 256 [2020-08-22 23:04:57,659 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 23:04:57,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-08-22 23:04:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 23:04:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-08-22 23:04:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-08-22 23:04:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-08-22 23:04:57,666 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-08-22 23:04:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:57,666 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-08-22 23:04:57,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 23:04:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-08-22 23:04:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 23:04:57,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:57,668 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:57,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:04:57,668 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-08-22 23:04:57,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:57,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636036905] [2020-08-22 23:04:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:02,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:02,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636036905] [2020-08-22 23:05:02,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:02,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-08-22 23:05:02,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551284848] [2020-08-22 23:05:02,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 23:05:02,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 23:05:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 23:05:02,746 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-08-22 23:05:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:11,032 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-08-22 23:05:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-08-22 23:05:11,035 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-08-22 23:05:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:11,037 INFO L225 Difference]: With dead ends: 261 [2020-08-22 23:05:11,037 INFO L226 Difference]: Without dead ends: 255 [2020-08-22 23:05:11,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-08-22 23:05:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-08-22 23:05:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-08-22 23:05:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 23:05:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-08-22 23:05:11,049 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-08-22 23:05:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-08-22 23:05:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 23:05:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-08-22 23:05:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-22 23:05:11,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:11,051 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:11,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:05:11,051 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-08-22 23:05:11,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:11,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137995994] [2020-08-22 23:05:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:16,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137995994] [2020-08-22 23:05:16,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:16,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-08-22 23:05:16,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009521650] [2020-08-22 23:05:16,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-08-22 23:05:16,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-08-22 23:05:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 23:05:16,402 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-08-22 23:05:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:25,033 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-08-22 23:05:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-08-22 23:05:25,034 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-08-22 23:05:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:25,036 INFO L225 Difference]: With dead ends: 266 [2020-08-22 23:05:25,036 INFO L226 Difference]: Without dead ends: 260 [2020-08-22 23:05:25,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-08-22 23:05:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-22 23:05:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-08-22 23:05:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-22 23:05:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-08-22 23:05:25,045 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-08-22 23:05:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:25,046 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-08-22 23:05:25,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-08-22 23:05:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-08-22 23:05:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-08-22 23:05:25,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:25,048 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:25,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:05:25,048 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-08-22 23:05:25,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:25,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881130238] [2020-08-22 23:05:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:30,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:30,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881130238] [2020-08-22 23:05:30,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:30,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-08-22 23:05:30,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139091483] [2020-08-22 23:05:30,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 23:05:30,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 23:05:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:05:30,880 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-08-22 23:05:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:40,073 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-08-22 23:05:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-08-22 23:05:40,074 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-08-22 23:05:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:40,075 INFO L225 Difference]: With dead ends: 271 [2020-08-22 23:05:40,075 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 23:05:40,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-08-22 23:05:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 23:05:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-08-22 23:05:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-22 23:05:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-08-22 23:05:40,084 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-08-22 23:05:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:40,084 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-08-22 23:05:40,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 23:05:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-08-22 23:05:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-08-22 23:05:40,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:40,086 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:40,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:05:40,087 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-08-22 23:05:40,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:40,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465288978] [2020-08-22 23:05:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:46,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465288978] [2020-08-22 23:05:46,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:46,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-08-22 23:05:46,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783351645] [2020-08-22 23:05:46,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-08-22 23:05:46,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:46,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-08-22 23:05:46,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 23:05:46,419 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-08-22 23:05:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:56,506 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-08-22 23:05:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-08-22 23:05:56,507 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-08-22 23:05:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:56,510 INFO L225 Difference]: With dead ends: 276 [2020-08-22 23:05:56,510 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 23:05:56,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-08-22 23:05:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 23:05:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-08-22 23:05:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 23:05:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-08-22 23:05:56,519 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-08-22 23:05:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:56,520 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-08-22 23:05:56,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-08-22 23:05:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-08-22 23:05:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-08-22 23:05:56,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:56,522 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:56,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:05:56,522 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-08-22 23:05:56,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:56,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738340775] [2020-08-22 23:05:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:03,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:03,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738340775] [2020-08-22 23:06:03,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:03,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-08-22 23:06:03,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243389847] [2020-08-22 23:06:03,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-08-22 23:06:03,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-08-22 23:06:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 23:06:03,506 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-08-22 23:06:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:14,559 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-08-22 23:06:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-08-22 23:06:14,561 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-08-22 23:06:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:14,563 INFO L225 Difference]: With dead ends: 281 [2020-08-22 23:06:14,563 INFO L226 Difference]: Without dead ends: 275 [2020-08-22 23:06:14,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-08-22 23:06:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-22 23:06:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-08-22 23:06:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-22 23:06:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-08-22 23:06:14,572 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-08-22 23:06:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:14,572 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-08-22 23:06:14,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-08-22 23:06:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-08-22 23:06:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-08-22 23:06:14,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:14,575 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:14,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 23:06:14,575 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-08-22 23:06:14,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:14,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610866450] [2020-08-22 23:06:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:22,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:22,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610866450] [2020-08-22 23:06:22,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:22,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-08-22 23:06:22,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357643352] [2020-08-22 23:06:22,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-08-22 23:06:22,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:22,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-08-22 23:06:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-08-22 23:06:22,240 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-08-22 23:06:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:34,186 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-08-22 23:06:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-08-22 23:06:34,187 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-08-22 23:06:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:34,189 INFO L225 Difference]: With dead ends: 286 [2020-08-22 23:06:34,189 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 23:06:34,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-08-22 23:06:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 23:06:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-08-22 23:06:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-08-22 23:06:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-08-22 23:06:34,197 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-08-22 23:06:34,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:34,198 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-08-22 23:06:34,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-08-22 23:06:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-08-22 23:06:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-22 23:06:34,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:34,200 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:34,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 23:06:34,201 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-08-22 23:06:34,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:34,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233061618] [2020-08-22 23:06:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:06:42,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233061618] [2020-08-22 23:06:42,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:42,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-08-22 23:06:42,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429791430] [2020-08-22 23:06:42,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-08-22 23:06:42,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-08-22 23:06:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 23:06:42,576 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-08-22 23:06:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:55,496 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-08-22 23:06:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-08-22 23:06:55,498 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-08-22 23:06:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:55,500 INFO L225 Difference]: With dead ends: 291 [2020-08-22 23:06:55,500 INFO L226 Difference]: Without dead ends: 285 [2020-08-22 23:06:55,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-08-22 23:06:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-08-22 23:06:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-08-22 23:06:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-22 23:06:55,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-08-22 23:06:55,509 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-08-22 23:06:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:55,509 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-08-22 23:06:55,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-08-22 23:06:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-08-22 23:06:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-08-22 23:06:55,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:55,512 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:55,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 23:06:55,512 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-08-22 23:06:55,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:55,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012631063] [2020-08-22 23:06:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:04,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:04,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012631063] [2020-08-22 23:07:04,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:04,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-08-22 23:07:04,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573109999] [2020-08-22 23:07:04,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-08-22 23:07:04,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-08-22 23:07:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-08-22 23:07:04,729 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-08-22 23:07:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:19,592 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-08-22 23:07:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-08-22 23:07:19,594 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-08-22 23:07:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:19,596 INFO L225 Difference]: With dead ends: 296 [2020-08-22 23:07:19,596 INFO L226 Difference]: Without dead ends: 290 [2020-08-22 23:07:19,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-08-22 23:07:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-08-22 23:07:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-08-22 23:07:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-22 23:07:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-08-22 23:07:19,604 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-08-22 23:07:19,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:19,604 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-08-22 23:07:19,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-08-22 23:07:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-08-22 23:07:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-22 23:07:19,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:19,606 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:19,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 23:07:19,607 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-08-22 23:07:19,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:19,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400489525] [2020-08-22 23:07:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:29,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:29,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400489525] [2020-08-22 23:07:29,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:29,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-08-22 23:07:29,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570414161] [2020-08-22 23:07:29,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-08-22 23:07:29,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-08-22 23:07:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 23:07:29,738 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-08-22 23:07:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:45,886 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-08-22 23:07:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-08-22 23:07:45,888 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-08-22 23:07:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:45,890 INFO L225 Difference]: With dead ends: 301 [2020-08-22 23:07:45,891 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 23:07:45,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-08-22 23:07:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 23:07:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-08-22 23:07:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-08-22 23:07:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-08-22 23:07:45,899 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-08-22 23:07:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:45,899 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-08-22 23:07:45,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-08-22 23:07:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-08-22 23:07:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-08-22 23:07:45,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:45,902 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:45,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 23:07:45,902 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-08-22 23:07:45,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:45,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484979261] [2020-08-22 23:07:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:07:57,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484979261] [2020-08-22 23:07:57,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:57,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-08-22 23:07:57,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043081028] [2020-08-22 23:07:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-08-22 23:07:57,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-08-22 23:07:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-08-22 23:07:57,280 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-08-22 23:08:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:15,035 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-08-22 23:08:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-08-22 23:08:15,037 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-08-22 23:08:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:15,039 INFO L225 Difference]: With dead ends: 306 [2020-08-22 23:08:15,040 INFO L226 Difference]: Without dead ends: 300 [2020-08-22 23:08:15,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-08-22 23:08:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-22 23:08:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-08-22 23:08:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-08-22 23:08:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-08-22 23:08:15,049 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-08-22 23:08:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:15,049 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-08-22 23:08:15,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-08-22 23:08:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-08-22 23:08:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-08-22 23:08:15,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:15,052 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:15,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 23:08:15,052 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-08-22 23:08:15,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:15,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695976749] [2020-08-22 23:08:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:08:27,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695976749] [2020-08-22 23:08:27,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:27,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-08-22 23:08:27,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351693031] [2020-08-22 23:08:27,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-08-22 23:08:27,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-08-22 23:08:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 23:08:27,357 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-08-22 23:08:47,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:47,252 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-08-22 23:08:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-08-22 23:08:47,254 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-08-22 23:08:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:47,256 INFO L225 Difference]: With dead ends: 311 [2020-08-22 23:08:47,257 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 23:08:47,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-08-22 23:08:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 23:08:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-08-22 23:08:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-22 23:08:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-08-22 23:08:47,265 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-08-22 23:08:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:47,265 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-08-22 23:08:47,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-08-22 23:08:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-08-22 23:08:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-08-22 23:08:47,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:47,267 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:47,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 23:08:47,267 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-08-22 23:08:47,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:47,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907193939] [2020-08-22 23:08:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:00,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:01,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907193939] [2020-08-22 23:09:01,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:01,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-08-22 23:09:01,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043908918] [2020-08-22 23:09:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-08-22 23:09:01,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-08-22 23:09:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-08-22 23:09:01,056 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-08-22 23:09:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:22,616 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-08-22 23:09:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-08-22 23:09:22,620 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-08-22 23:09:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:22,622 INFO L225 Difference]: With dead ends: 316 [2020-08-22 23:09:22,622 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 23:09:22,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-08-22 23:09:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 23:09:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-08-22 23:09:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 23:09:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-08-22 23:09:22,629 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-08-22 23:09:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:22,630 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-08-22 23:09:22,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-08-22 23:09:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-08-22 23:09:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-08-22 23:09:22,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:22,631 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:22,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 23:09:22,632 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-08-22 23:09:22,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:22,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197745722] [2020-08-22 23:09:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:09:37,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197745722] [2020-08-22 23:09:37,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:37,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-08-22 23:09:37,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499208439] [2020-08-22 23:09:37,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-08-22 23:09:37,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-08-22 23:09:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 23:09:37,569 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-08-22 23:10:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:00,309 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-08-22 23:10:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-08-22 23:10:00,312 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-08-22 23:10:00,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:00,314 INFO L225 Difference]: With dead ends: 321 [2020-08-22 23:10:00,314 INFO L226 Difference]: Without dead ends: 315 [2020-08-22 23:10:00,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-08-22 23:10:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-22 23:10:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-08-22 23:10:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 23:10:00,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-08-22 23:10:00,323 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-08-22 23:10:00,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:00,324 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-08-22 23:10:00,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-08-22 23:10:00,324 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-08-22 23:10:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-22 23:10:00,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:00,326 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:00,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 23:10:00,326 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:00,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-08-22 23:10:00,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:00,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254708640] [2020-08-22 23:10:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:17,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:10:17,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254708640] [2020-08-22 23:10:17,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:17,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-08-22 23:10:17,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115144598] [2020-08-22 23:10:17,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-08-22 23:10:17,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-08-22 23:10:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-08-22 23:10:17,312 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states. [2020-08-22 23:10:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:42,799 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-08-22 23:10:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-08-22 23:10:42,803 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 311 [2020-08-22 23:10:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:42,805 INFO L225 Difference]: With dead ends: 326 [2020-08-22 23:10:42,805 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 23:10:42,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-08-22 23:10:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 23:10:42,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-08-22 23:10:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-08-22 23:10:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2020-08-22 23:10:42,813 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 311 [2020-08-22 23:10:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:42,813 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2020-08-22 23:10:42,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-08-22 23:10:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2020-08-22 23:10:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-08-22 23:10:42,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:42,815 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:42,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 23:10:42,815 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash -813344007, now seen corresponding path program 60 times [2020-08-22 23:10:42,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:42,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678533624] [2020-08-22 23:10:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:00,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:00,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678533624] [2020-08-22 23:11:00,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:00,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2020-08-22 23:11:00,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130204848] [2020-08-22 23:11:00,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-08-22 23:11:00,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-08-22 23:11:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 23:11:00,527 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 124 states. [2020-08-22 23:11:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:28,893 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-08-22 23:11:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-08-22 23:11:28,897 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 316 [2020-08-22 23:11:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:28,900 INFO L225 Difference]: With dead ends: 331 [2020-08-22 23:11:28,900 INFO L226 Difference]: Without dead ends: 325 [2020-08-22 23:11:28,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-08-22 23:11:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-22 23:11:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-08-22 23:11:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-08-22 23:11:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2020-08-22 23:11:28,911 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 316 [2020-08-22 23:11:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:28,911 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2020-08-22 23:11:28,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-08-22 23:11:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2020-08-22 23:11:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-08-22 23:11:28,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:28,913 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:28,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 23:11:28,913 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -225742953, now seen corresponding path program 61 times [2020-08-22 23:11:28,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:28,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793055272] [2020-08-22 23:11:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:48,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:11:48,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793055272] [2020-08-22 23:11:48,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:48,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2020-08-22 23:11:48,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003005850] [2020-08-22 23:11:48,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-08-22 23:11:48,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-08-22 23:11:48,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-08-22 23:11:48,546 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 126 states. [2020-08-22 23:12:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:19,847 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2020-08-22 23:12:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-08-22 23:12:19,851 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 321 [2020-08-22 23:12:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:19,853 INFO L225 Difference]: With dead ends: 336 [2020-08-22 23:12:19,853 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 23:12:19,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-08-22 23:12:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 23:12:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-08-22 23:12:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-08-22 23:12:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2020-08-22 23:12:19,863 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 321 [2020-08-22 23:12:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:19,864 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2020-08-22 23:12:19,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-08-22 23:12:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2020-08-22 23:12:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 23:12:19,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:19,866 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:19,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 23:12:19,867 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -238056007, now seen corresponding path program 62 times [2020-08-22 23:12:19,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:19,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710654790] [2020-08-22 23:12:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:41,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:12:41,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710654790] [2020-08-22 23:12:41,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:41,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2020-08-22 23:12:41,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858047236] [2020-08-22 23:12:41,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-08-22 23:12:41,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:41,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-08-22 23:12:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-08-22 23:12:41,377 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 128 states. [2020-08-22 23:13:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:11,221 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2020-08-22 23:13:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-08-22 23:13:11,224 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 326 [2020-08-22 23:13:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:11,227 INFO L225 Difference]: With dead ends: 341 [2020-08-22 23:13:11,227 INFO L226 Difference]: Without dead ends: 335 [2020-08-22 23:13:11,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-08-22 23:13:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-22 23:13:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-08-22 23:13:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-08-22 23:13:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2020-08-22 23:13:11,236 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 326 [2020-08-22 23:13:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:11,236 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2020-08-22 23:13:11,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-08-22 23:13:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2020-08-22 23:13:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-08-22 23:13:11,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:11,239 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:13:11,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 23:13:11,239 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1215493335, now seen corresponding path program 63 times [2020-08-22 23:13:11,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:11,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492422195] [2020-08-22 23:13:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:31,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:13:31,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492422195] [2020-08-22 23:13:31,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:31,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2020-08-22 23:13:31,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221564880] [2020-08-22 23:13:31,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-08-22 23:13:31,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-08-22 23:13:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-08-22 23:13:31,291 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 130 states. [2020-08-22 23:14:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:03,365 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2020-08-22 23:14:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-08-22 23:14:03,369 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 331 [2020-08-22 23:14:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:03,372 INFO L225 Difference]: With dead ends: 346 [2020-08-22 23:14:03,372 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 23:14:03,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-08-22 23:14:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 23:14:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2020-08-22 23:14:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-08-22 23:14:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2020-08-22 23:14:03,379 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 331 [2020-08-22 23:14:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:03,380 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2020-08-22 23:14:03,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-08-22 23:14:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2020-08-22 23:14:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-08-22 23:14:03,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:03,381 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:03,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 23:14:03,382 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:03,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1777774471, now seen corresponding path program 64 times [2020-08-22 23:14:03,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:03,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609137421] [2020-08-22 23:14:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:25,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609137421] [2020-08-22 23:14:25,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:25,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2020-08-22 23:14:25,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510193385] [2020-08-22 23:14:25,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-08-22 23:14:25,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-08-22 23:14:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=12935, Unknown=0, NotChecked=0, Total=17292 [2020-08-22 23:14:25,737 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand 132 states. [2020-08-22 23:15:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:00,970 INFO L93 Difference]: Finished difference Result 351 states and 351 transitions. [2020-08-22 23:15:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-08-22 23:15:00,974 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 336 [2020-08-22 23:15:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:00,977 INFO L225 Difference]: With dead ends: 351 [2020-08-22 23:15:00,977 INFO L226 Difference]: Without dead ends: 345 [2020-08-22 23:15:00,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12287 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=21125, Invalid=46215, Unknown=0, NotChecked=0, Total=67340 [2020-08-22 23:15:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-08-22 23:15:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-08-22 23:15:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-08-22 23:15:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 342 transitions. [2020-08-22 23:15:00,985 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 342 transitions. Word has length 336 [2020-08-22 23:15:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:00,985 INFO L479 AbstractCegarLoop]: Abstraction has 342 states and 342 transitions. [2020-08-22 23:15:00,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-08-22 23:15:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 342 transitions. [2020-08-22 23:15:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-08-22 23:15:00,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:00,988 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 23:15:00,988 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1281037801, now seen corresponding path program 65 times [2020-08-22 23:15:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:00,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475134444] [2020-08-22 23:15:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat