/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 -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 19:46:17,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:17,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:17,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:17,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:17,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:17,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:17,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:17,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:17,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:17,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:17,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:17,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:17,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:17,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:17,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:17,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:17,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:17,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:17,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:17,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:17,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:17,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:17,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:17,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:17,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:17,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:17,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:17,685 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 19:46:17,700 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:17,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:17,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:17,702 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:17,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:17,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:17,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:17,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:17,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:17,709 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:17,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:17,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:17,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:17,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:17,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:17,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:17,711 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:17,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:18,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:18,018 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:18,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:18,022 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:18,022 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 19:46:18,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f212ff5/ba3c2fe8f13a4672b314118691755032/FLAGa012f184b [2020-08-22 19:46:18,569 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:18,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-08-22 19:46:18,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f212ff5/ba3c2fe8f13a4672b314118691755032/FLAGa012f184b [2020-08-22 19:46:18,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f212ff5/ba3c2fe8f13a4672b314118691755032 [2020-08-22 19:46:18,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:18,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:18,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:18,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:18,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:18,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:18" (1/1) ... [2020-08-22 19:46:18,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469d7643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:18, skipping insertion in model container [2020-08-22 19:46:18,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:18" (1/1) ... [2020-08-22 19:46:18,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:18,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:19,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:19,192 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:19,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:19,243 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:19,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19 WrapperNode [2020-08-22 19:46:19,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:19,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:19,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:19,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:19,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (1/1) ... [2020-08-22 19:46:19,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:19,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:19,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:19,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:19,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (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 19:46:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:19,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:19,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:46:19,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:46:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:46:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:46:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:19,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:19,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:19,694 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:46:19,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:19 BoogieIcfgContainer [2020-08-22 19:46:19,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:19,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:19,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:19,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:19,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:18" (1/3) ... [2020-08-22 19:46:19,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4dc85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:19, skipping insertion in model container [2020-08-22 19:46:19,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:19" (2/3) ... [2020-08-22 19:46:19,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4dc85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:19, skipping insertion in model container [2020-08-22 19:46:19,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:19" (3/3) ... [2020-08-22 19:46:19,712 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-08-22 19:46:19,735 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:19,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:19,793 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:19,831 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:19,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:19,831 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:19,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:19,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:19,832 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:19,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:19,832 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-08-22 19:46:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:46:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:19,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:19,862 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-08-22 19:46:19,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:19,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977605430] [2020-08-22 19:46:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:19,941 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,086 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 19:46:20,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977605430] [2020-08-22 19:46:20,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:20,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469580312] [2020-08-22 19:46:20,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:20,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:20,117 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-08-22 19:46:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,212 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-08-22 19:46:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:20,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-22 19:46:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,224 INFO L225 Difference]: With dead ends: 45 [2020-08-22 19:46:20,225 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 19:46:20,229 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 19:46:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 19:46:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 19:46:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 19:46:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-08-22 19:46:20,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-08-22 19:46:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,277 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-08-22 19:46:20,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-08-22 19:46:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:46:20,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:20,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:20,279 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-08-22 19:46:20,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89417926] [2020-08-22 19:46:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,283 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,382 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 19:46:20,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89417926] [2020-08-22 19:46:20,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:20,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707333309] [2020-08-22 19:46:20,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:20,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:20,386 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-08-22 19:46:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,447 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-08-22 19:46:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:20,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-22 19:46:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,450 INFO L225 Difference]: With dead ends: 31 [2020-08-22 19:46:20,450 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 19:46:20,452 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 19:46:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 19:46:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-22 19:46:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:46:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 19:46:20,461 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-08-22 19:46:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,461 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 19:46:20,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 19:46:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 19:46:20,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,463 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 19:46:20,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:20,464 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-08-22 19:46:20,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570068075] [2020-08-22 19:46:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,489 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,602 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 19:46:20,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570068075] [2020-08-22 19:46:20,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:20,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897999593] [2020-08-22 19:46:20,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:20,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:20,605 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-08-22 19:46:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,705 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-22 19:46:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:20,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-08-22 19:46:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,707 INFO L225 Difference]: With dead ends: 36 [2020-08-22 19:46:20,707 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 19:46:20,708 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 19:46:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 19:46:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-22 19:46:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:46:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-08-22 19:46:20,718 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-08-22 19:46:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,719 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-08-22 19:46:20,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-08-22 19:46:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:46:20,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,721 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 19:46:20,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:20,721 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,722 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-08-22 19:46:20,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572824120] [2020-08-22 19:46:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,736 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,896 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 19:46:20,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572824120] [2020-08-22 19:46:20,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:20,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965981040] [2020-08-22 19:46:20,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:20,902 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-08-22 19:46:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:21,069 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-08-22 19:46:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:46:21,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-22 19:46:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:21,071 INFO L225 Difference]: With dead ends: 41 [2020-08-22 19:46:21,071 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 19:46:21,072 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 19:46:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 19:46:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-08-22 19:46:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 19:46:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-22 19:46:21,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-08-22 19:46:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:21,082 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-22 19:46:21,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-22 19:46:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 19:46:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:21,083 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 19:46:21,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:21,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-08-22 19:46:21,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:21,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669132433] [2020-08-22 19:46:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:21,090 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,193 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 19:46:21,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669132433] [2020-08-22 19:46:21,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:21,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:21,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646835382] [2020-08-22 19:46:21,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:21,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:21,196 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-08-22 19:46:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:21,332 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-08-22 19:46:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:21,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-08-22 19:46:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:21,334 INFO L225 Difference]: With dead ends: 46 [2020-08-22 19:46:21,334 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 19:46:21,335 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 19:46:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 19:46:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-08-22 19:46:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 19:46:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-08-22 19:46:21,344 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-08-22 19:46:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:21,345 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-08-22 19:46:21,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-08-22 19:46:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 19:46:21,346 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:21,346 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 19:46:21,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:21,347 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-08-22 19:46:21,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:21,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652970579] [2020-08-22 19:46:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:21,353 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,482 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 19:46:21,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652970579] [2020-08-22 19:46:21,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:21,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:21,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337928576] [2020-08-22 19:46:21,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:21,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:21,485 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-08-22 19:46:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:21,661 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-08-22 19:46:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:21,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-08-22 19:46:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:21,663 INFO L225 Difference]: With dead ends: 51 [2020-08-22 19:46:21,664 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 19:46:21,665 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 19:46:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 19:46:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-08-22 19:46:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 19:46:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-08-22 19:46:21,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-08-22 19:46:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:21,673 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-08-22 19:46:21,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-08-22 19:46:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:46:21,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:21,675 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 19:46:21,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:21,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-08-22 19:46:21,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:21,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335240133] [2020-08-22 19:46:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:21,681 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,831 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 19:46:21,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335240133] [2020-08-22 19:46:21,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:21,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:46:21,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778476347] [2020-08-22 19:46:21,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:46:21,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:46:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:21,834 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-08-22 19:46:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,040 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-08-22 19:46:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:46:22,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-22 19:46:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,042 INFO L225 Difference]: With dead ends: 56 [2020-08-22 19:46:22,042 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 19:46:22,043 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 19:46:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 19:46:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 19:46:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 19:46:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-08-22 19:46:22,050 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-08-22 19:46:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,050 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-08-22 19:46:22,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:46:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-08-22 19:46:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:46:22,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,052 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 19:46:22,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:22,053 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-08-22 19:46:22,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430808802] [2020-08-22 19:46:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,058 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,243 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 19:46:22,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430808802] [2020-08-22 19:46:22,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:46:22,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442519827] [2020-08-22 19:46:22,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:46:22,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:46:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:22,245 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-08-22 19:46:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,518 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-08-22 19:46:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:46:22,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-22 19:46:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,521 INFO L225 Difference]: With dead ends: 61 [2020-08-22 19:46:22,521 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 19:46:22,525 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 19:46:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 19:46:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-08-22 19:46:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 19:46:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-08-22 19:46:22,537 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-08-22 19:46:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,540 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-08-22 19:46:22,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:46:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-08-22 19:46:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:46:22,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,545 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 19:46:22,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:22,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,546 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-08-22 19:46:22,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991944265] [2020-08-22 19:46:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,552 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,781 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 19:46:22,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991944265] [2020-08-22 19:46:22,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:46:22,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065545023] [2020-08-22 19:46:22,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:46:22,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:46:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:22,784 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-08-22 19:46:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,096 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-08-22 19:46:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:46:23,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-08-22 19:46:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,103 INFO L225 Difference]: With dead ends: 66 [2020-08-22 19:46:23,103 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 19:46:23,104 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 19:46:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 19:46:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-08-22 19:46:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 19:46:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-08-22 19:46:23,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-08-22 19:46:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,113 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-08-22 19:46:23,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:46:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-08-22 19:46:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 19:46:23,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,114 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 19:46:23,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:46:23,114 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-08-22 19:46:23,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102086403] [2020-08-22 19:46:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,120 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,375 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 19:46:23,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102086403] [2020-08-22 19:46:23,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:23,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:46:23,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268516750] [2020-08-22 19:46:23,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:46:23,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:46:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:23,378 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-08-22 19:46:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,768 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-08-22 19:46:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:46:23,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-08-22 19:46:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,769 INFO L225 Difference]: With dead ends: 71 [2020-08-22 19:46:23,773 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 19:46:23,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:46:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 19:46:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-08-22 19:46:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 19:46:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-08-22 19:46:23,795 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-08-22 19:46:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,795 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-08-22 19:46:23,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:46:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-08-22 19:46:23,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 19:46:23,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,800 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 19:46:23,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:46:23,801 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-08-22 19:46:23,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237960534] [2020-08-22 19:46:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,808 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,097 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 19:46:24,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237960534] [2020-08-22 19:46:24,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:24,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 19:46:24,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722009802] [2020-08-22 19:46:24,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 19:46:24,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 19:46:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:24,100 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-08-22 19:46:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:24,557 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-08-22 19:46:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 19:46:24,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-08-22 19:46:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:24,560 INFO L225 Difference]: With dead ends: 76 [2020-08-22 19:46:24,560 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 19:46:24,562 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 19:46:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 19:46:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-08-22 19:46:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 19:46:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-08-22 19:46:24,571 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-08-22 19:46:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:24,571 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-08-22 19:46:24,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 19:46:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-08-22 19:46:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 19:46:24,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:24,572 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 19:46:24,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:46:24,573 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-08-22 19:46:24,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:24,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536896485] [2020-08-22 19:46:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:24,578 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,855 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 19:46:24,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536896485] [2020-08-22 19:46:24,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:24,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 19:46:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440385079] [2020-08-22 19:46:24,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 19:46:24,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 19:46:24,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:46:24,858 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-08-22 19:46:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:25,384 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-08-22 19:46:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 19:46:25,385 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-08-22 19:46:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:25,386 INFO L225 Difference]: With dead ends: 81 [2020-08-22 19:46:25,386 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 19:46:25,388 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 19:46:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 19:46:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-08-22 19:46:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 19:46:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-08-22 19:46:25,402 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-08-22 19:46:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:25,402 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-08-22 19:46:25,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 19:46:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-08-22 19:46:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 19:46:25,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:25,403 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 19:46:25,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:46:25,404 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:25,404 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-08-22 19:46:25,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:25,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737453693] [2020-08-22 19:46:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:25,408 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:25,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:25,738 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 19:46:25,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737453693] [2020-08-22 19:46:25,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:25,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 19:46:25,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669311204] [2020-08-22 19:46:25,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 19:46:25,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:25,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 19:46:25,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:46:25,741 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-08-22 19:46:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:26,317 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-08-22 19:46:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 19:46:26,318 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-08-22 19:46:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:26,319 INFO L225 Difference]: With dead ends: 86 [2020-08-22 19:46:26,320 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 19:46:26,321 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 19:46:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 19:46:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-08-22 19:46:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 19:46:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-08-22 19:46:26,329 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-08-22 19:46:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:26,330 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-08-22 19:46:26,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 19:46:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-08-22 19:46:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 19:46:26,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:26,331 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 19:46:26,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:46:26,331 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-08-22 19:46:26,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:26,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584453958] [2020-08-22 19:46:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:26,342 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:26,736 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 19:46:26,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584453958] [2020-08-22 19:46:26,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:26,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 19:46:26,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714105501] [2020-08-22 19:46:26,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 19:46:26,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 19:46:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:46:26,739 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-08-22 19:46:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:27,397 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-08-22 19:46:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 19:46:27,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-08-22 19:46:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:27,398 INFO L225 Difference]: With dead ends: 91 [2020-08-22 19:46:27,399 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 19:46:27,400 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 19:46:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 19:46:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-08-22 19:46:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 19:46:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-08-22 19:46:27,408 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-08-22 19:46:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:27,409 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-08-22 19:46:27,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 19:46:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-08-22 19:46:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 19:46:27,410 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:27,410 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 19:46:27,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:46:27,410 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:27,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:27,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-08-22 19:46:27,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:27,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513977157] [2020-08-22 19:46:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:27,422 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:27,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:27,839 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 19:46:27,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513977157] [2020-08-22 19:46:27,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:27,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-08-22 19:46:27,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598795182] [2020-08-22 19:46:27,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 19:46:27,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 19:46:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:46:27,841 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-08-22 19:46:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:28,551 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-08-22 19:46:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 19:46:28,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-08-22 19:46:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:28,553 INFO L225 Difference]: With dead ends: 96 [2020-08-22 19:46:28,553 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 19:46:28,555 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 19:46:28,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 19:46:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-08-22 19:46:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 19:46:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-08-22 19:46:28,562 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-08-22 19:46:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:28,562 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-08-22 19:46:28,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 19:46:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-08-22 19:46:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 19:46:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:28,563 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 19:46:28,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:46:28,564 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-08-22 19:46:28,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:28,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247476998] [2020-08-22 19:46:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:28,569 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:29,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:29,037 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 19:46:29,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247476998] [2020-08-22 19:46:29,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:29,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-08-22 19:46:29,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440534018] [2020-08-22 19:46:29,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 19:46:29,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 19:46:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:46:29,041 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-08-22 19:46:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:29,814 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-08-22 19:46:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 19:46:29,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-08-22 19:46:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:29,815 INFO L225 Difference]: With dead ends: 101 [2020-08-22 19:46:29,815 INFO L226 Difference]: Without dead ends: 95 [2020-08-22 19:46:29,817 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 19:46:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-22 19:46:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-08-22 19:46:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-22 19:46:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-08-22 19:46:29,824 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-08-22 19:46:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:29,825 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-08-22 19:46:29,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 19:46:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-08-22 19:46:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 19:46:29,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:29,826 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 19:46:29,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:46:29,826 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-08-22 19:46:29,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:29,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556488313] [2020-08-22 19:46:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:29,831 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:30,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:30,309 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 19:46:30,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556488313] [2020-08-22 19:46:30,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:30,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-08-22 19:46:30,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912247929] [2020-08-22 19:46:30,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 19:46:30,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 19:46:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:46:30,312 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-08-22 19:46:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:31,287 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-08-22 19:46:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 19:46:31,288 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-08-22 19:46:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:31,289 INFO L225 Difference]: With dead ends: 106 [2020-08-22 19:46:31,289 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 19:46:31,293 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 19:46:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 19:46:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-08-22 19:46:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 19:46:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-08-22 19:46:31,303 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-08-22 19:46:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:31,303 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-08-22 19:46:31,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 19:46:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-08-22 19:46:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 19:46:31,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:31,311 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 19:46:31,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:46:31,311 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-08-22 19:46:31,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:31,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284944912] [2020-08-22 19:46:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:31,321 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:31,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:31,867 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 19:46:31,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284944912] [2020-08-22 19:46:31,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:31,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-08-22 19:46:31,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709318386] [2020-08-22 19:46:31,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 19:46:31,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 19:46:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:46:31,870 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-08-22 19:46:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:32,870 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-08-22 19:46:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 19:46:32,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-08-22 19:46:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:32,872 INFO L225 Difference]: With dead ends: 111 [2020-08-22 19:46:32,872 INFO L226 Difference]: Without dead ends: 105 [2020-08-22 19:46:32,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:46:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-08-22 19:46:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-08-22 19:46:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 19:46:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-08-22 19:46:32,881 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-08-22 19:46:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:32,881 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-08-22 19:46:32,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 19:46:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-08-22 19:46:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 19:46:32,882 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:32,883 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 19:46:32,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:46:32,883 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:32,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:32,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-08-22 19:46:32,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:32,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110912367] [2020-08-22 19:46:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:32,895 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,533 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 19:46:33,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110912367] [2020-08-22 19:46:33,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-08-22 19:46:33,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604928827] [2020-08-22 19:46:33,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 19:46:33,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 19:46:33,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:46:33,539 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-08-22 19:46:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,725 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-08-22 19:46:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 19:46:34,726 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-08-22 19:46:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,727 INFO L225 Difference]: With dead ends: 116 [2020-08-22 19:46:34,727 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 19:46:34,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:46:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 19:46:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-08-22 19:46:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 19:46:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-08-22 19:46:34,736 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-08-22 19:46:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,737 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-08-22 19:46:34,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 19:46:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-08-22 19:46:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 19:46:34,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,738 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 19:46:34,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:46:34,739 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-08-22 19:46:34,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086155342] [2020-08-22 19:46:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,749 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:35,504 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 19:46:35,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086155342] [2020-08-22 19:46:35,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:35,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-08-22 19:46:35,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248153214] [2020-08-22 19:46:35,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 19:46:35,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 19:46:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:46:35,507 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-08-22 19:46:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:36,679 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-08-22 19:46:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 19:46:36,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-08-22 19:46:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:36,682 INFO L225 Difference]: With dead ends: 121 [2020-08-22 19:46:36,682 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 19:46:36,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:46:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 19:46:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-08-22 19:46:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 19:46:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-08-22 19:46:36,690 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-08-22 19:46:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:36,690 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-08-22 19:46:36,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 19:46:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-08-22 19:46:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-08-22 19:46:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:36,692 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 19:46:36,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:46:36,692 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-08-22 19:46:36,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:36,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88715648] [2020-08-22 19:46:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:36,701 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:37,463 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 19:46:37,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88715648] [2020-08-22 19:46:37,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:37,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-08-22 19:46:37,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380772677] [2020-08-22 19:46:37,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 19:46:37,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 19:46:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:46:37,466 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-08-22 19:46:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:38,714 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-08-22 19:46:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 19:46:38,714 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-08-22 19:46:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:38,716 INFO L225 Difference]: With dead ends: 126 [2020-08-22 19:46:38,716 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 19:46:38,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:46:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 19:46:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-08-22 19:46:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 19:46:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-08-22 19:46:38,724 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-08-22 19:46:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:38,725 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-08-22 19:46:38,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 19:46:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-08-22 19:46:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 19:46:38,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:38,726 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 19:46:38,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:46:38,727 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:38,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-08-22 19:46:38,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:38,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580846002] [2020-08-22 19:46:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:38,730 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:39,548 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 19:46:39,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580846002] [2020-08-22 19:46:39,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:39,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-08-22 19:46:39,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340105507] [2020-08-22 19:46:39,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 19:46:39,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 19:46:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:46:39,550 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-08-22 19:46:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:41,017 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-08-22 19:46:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-08-22 19:46:41,019 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-08-22 19:46:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:41,020 INFO L225 Difference]: With dead ends: 131 [2020-08-22 19:46:41,021 INFO L226 Difference]: Without dead ends: 125 [2020-08-22 19:46:41,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 19:46:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-22 19:46:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-08-22 19:46:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 19:46:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-08-22 19:46:41,032 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-08-22 19:46:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:41,032 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-08-22 19:46:41,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 19:46:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-08-22 19:46:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 19:46:41,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:41,034 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 19:46:41,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:46:41,034 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:41,035 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-08-22 19:46:41,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:41,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228279694] [2020-08-22 19:46:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:41,048 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:41,964 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 19:46:41,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228279694] [2020-08-22 19:46:41,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:41,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-08-22 19:46:41,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683724353] [2020-08-22 19:46:41,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 19:46:41,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 19:46:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 19:46:41,966 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-08-22 19:46:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:43,543 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-08-22 19:46:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 19:46:43,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-08-22 19:46:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:43,545 INFO L225 Difference]: With dead ends: 136 [2020-08-22 19:46:43,545 INFO L226 Difference]: Without dead ends: 130 [2020-08-22 19:46:43,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 19:46:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-22 19:46:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-08-22 19:46:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-08-22 19:46:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-08-22 19:46:43,552 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-08-22 19:46:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:43,552 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-08-22 19:46:43,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 19:46:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-08-22 19:46:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 19:46:43,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:43,554 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 19:46:43,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 19:46:43,554 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-08-22 19:46:43,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:43,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095004081] [2020-08-22 19:46:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:43,561 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:44,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:44,549 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 19:46:44,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095004081] [2020-08-22 19:46:44,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:44,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-08-22 19:46:44,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629253296] [2020-08-22 19:46:44,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 19:46:44,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 19:46:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:46:44,551 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-08-22 19:46:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:46,273 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-08-22 19:46:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-08-22 19:46:46,274 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-08-22 19:46:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:46,276 INFO L225 Difference]: With dead ends: 141 [2020-08-22 19:46:46,276 INFO L226 Difference]: Without dead ends: 135 [2020-08-22 19:46:46,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 19:46:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-08-22 19:46:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-08-22 19:46:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 19:46:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-08-22 19:46:46,283 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-08-22 19:46:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:46,283 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-08-22 19:46:46,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 19:46:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-08-22 19:46:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 19:46:46,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:46,285 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 19:46:46,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 19:46:46,285 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-08-22 19:46:46,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:46,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462507370] [2020-08-22 19:46:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:46,294 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:47,327 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 19:46:47,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462507370] [2020-08-22 19:46:47,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:47,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-08-22 19:46:47,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850291826] [2020-08-22 19:46:47,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 19:46:47,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 19:46:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 19:46:47,329 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-08-22 19:46:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:49,189 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-08-22 19:46:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 19:46:49,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-08-22 19:46:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:49,191 INFO L225 Difference]: With dead ends: 146 [2020-08-22 19:46:49,191 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 19:46:49,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 19:46:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 19:46:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-08-22 19:46:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 19:46:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-08-22 19:46:49,199 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-08-22 19:46:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:49,199 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-08-22 19:46:49,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 19:46:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-08-22 19:46:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 19:46:49,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:49,201 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 19:46:49,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 19:46:49,202 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-08-22 19:46:49,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:49,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663945198] [2020-08-22 19:46:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:49,212 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:50,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:50,390 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 19:46:50,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663945198] [2020-08-22 19:46:50,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:50,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-08-22 19:46:50,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482014586] [2020-08-22 19:46:50,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 19:46:50,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 19:46:50,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:46:50,392 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-08-22 19:46:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:52,429 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-08-22 19:46:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-08-22 19:46:52,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-08-22 19:46:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:52,432 INFO L225 Difference]: With dead ends: 151 [2020-08-22 19:46:52,432 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 19:46:52,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 19:46:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 19:46:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-08-22 19:46:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-22 19:46:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-08-22 19:46:52,439 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-08-22 19:46:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:52,439 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-08-22 19:46:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 19:46:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-08-22 19:46:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 19:46:52,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:52,441 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 19:46:52,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 19:46:52,441 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:52,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-08-22 19:46:52,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:52,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126759294] [2020-08-22 19:46:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:52,451 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:53,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:53,743 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 19:46:53,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126759294] [2020-08-22 19:46:53,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:53,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-08-22 19:46:53,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767965538] [2020-08-22 19:46:53,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 19:46:53,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 19:46:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 19:46:53,746 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-08-22 19:46:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:55,846 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-08-22 19:46:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 19:46:55,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-08-22 19:46:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:55,849 INFO L225 Difference]: With dead ends: 156 [2020-08-22 19:46:55,849 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 19:46:55,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 19:46:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 19:46:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-08-22 19:46:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 19:46:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-08-22 19:46:55,857 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-08-22 19:46:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:55,857 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-08-22 19:46:55,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 19:46:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-08-22 19:46:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 19:46:55,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:55,859 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 19:46:55,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 19:46:55,859 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-08-22 19:46:55,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:55,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481645691] [2020-08-22 19:46:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:55,870 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:57,267 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 19:46:57,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481645691] [2020-08-22 19:46:57,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:57,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-08-22 19:46:57,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819815735] [2020-08-22 19:46:57,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 19:46:57,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 19:46:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 19:46:57,270 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-08-22 19:46:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:59,494 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-08-22 19:46:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-08-22 19:46:59,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-08-22 19:46:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:59,497 INFO L225 Difference]: With dead ends: 161 [2020-08-22 19:46:59,497 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 19:46:59,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 19:46:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 19:46:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-08-22 19:46:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 19:46:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-08-22 19:46:59,505 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-08-22 19:46:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:59,505 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-08-22 19:46:59,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 19:46:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-08-22 19:46:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 19:46:59,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:59,506 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 19:46:59,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 19:46:59,507 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:59,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:59,507 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-08-22 19:46:59,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:59,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850496217] [2020-08-22 19:46:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:59,513 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:00,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:00,987 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 19:47:00,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850496217] [2020-08-22 19:47:00,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:00,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-08-22 19:47:00,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471690603] [2020-08-22 19:47:00,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 19:47:00,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 19:47:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 19:47:00,989 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-08-22 19:47:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:03,406 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-08-22 19:47:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 19:47:03,406 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-08-22 19:47:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:03,408 INFO L225 Difference]: With dead ends: 166 [2020-08-22 19:47:03,408 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 19:47:03,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 19:47:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 19:47:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-08-22 19:47:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 19:47:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-08-22 19:47:03,416 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-08-22 19:47:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:03,418 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-08-22 19:47:03,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 19:47:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-08-22 19:47:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 19:47:03,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:03,419 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 19:47:03,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 19:47:03,420 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-08-22 19:47:03,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:03,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483309595] [2020-08-22 19:47:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:03,425 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:05,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:05,138 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 19:47:05,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483309595] [2020-08-22 19:47:05,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:05,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-08-22 19:47:05,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349753814] [2020-08-22 19:47:05,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 19:47:05,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 19:47:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 19:47:05,140 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-08-22 19:47:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:07,850 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-08-22 19:47:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-08-22 19:47:07,850 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-08-22 19:47:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:07,852 INFO L225 Difference]: With dead ends: 171 [2020-08-22 19:47:07,852 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 19:47:07,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 19:47:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 19:47:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-08-22 19:47:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 19:47:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-08-22 19:47:07,861 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-08-22 19:47:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:07,862 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-08-22 19:47:07,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 19:47:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-08-22 19:47:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-22 19:47:07,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:07,863 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 19:47:07,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 19:47:07,864 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-08-22 19:47:07,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:07,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62463613] [2020-08-22 19:47:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:07,868 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:09,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:09,587 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 19:47:09,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62463613] [2020-08-22 19:47:09,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:09,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-08-22 19:47:09,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170553691] [2020-08-22 19:47:09,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 19:47:09,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 19:47:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 19:47:09,590 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-08-22 19:47:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:12,478 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-08-22 19:47:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 19:47:12,478 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-08-22 19:47:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:12,480 INFO L225 Difference]: With dead ends: 176 [2020-08-22 19:47:12,480 INFO L226 Difference]: Without dead ends: 170 [2020-08-22 19:47:12,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 19:47:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-08-22 19:47:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-08-22 19:47:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 19:47:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-08-22 19:47:12,488 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-08-22 19:47:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:12,488 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-08-22 19:47:12,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 19:47:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-08-22 19:47:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 19:47:12,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:12,490 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 19:47:12,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 19:47:12,490 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-08-22 19:47:12,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:12,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997124460] [2020-08-22 19:47:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:12,501 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:14,347 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 19:47:14,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997124460] [2020-08-22 19:47:14,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:14,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-08-22 19:47:14,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772798939] [2020-08-22 19:47:14,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 19:47:14,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:14,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 19:47:14,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 19:47:14,349 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-08-22 19:47:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:17,264 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-08-22 19:47:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-08-22 19:47:17,264 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-08-22 19:47:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:17,266 INFO L225 Difference]: With dead ends: 181 [2020-08-22 19:47:17,266 INFO L226 Difference]: Without dead ends: 175 [2020-08-22 19:47:17,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 19:47:17,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-08-22 19:47:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-08-22 19:47:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-22 19:47:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-08-22 19:47:17,273 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-08-22 19:47:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:17,274 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-08-22 19:47:17,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 19:47:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-08-22 19:47:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-08-22 19:47:17,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:17,275 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 19:47:17,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 19:47:17,276 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-08-22 19:47:17,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:17,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857782451] [2020-08-22 19:47:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:17,281 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:19,337 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 19:47:19,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857782451] [2020-08-22 19:47:19,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:19,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-08-22 19:47:19,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050542914] [2020-08-22 19:47:19,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 19:47:19,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 19:47:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 19:47:19,339 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-08-22 19:47:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:22,519 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-08-22 19:47:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 19:47:22,520 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-08-22 19:47:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:22,522 INFO L225 Difference]: With dead ends: 186 [2020-08-22 19:47:22,522 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 19:47:22,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-08-22 19:47:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 19:47:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-08-22 19:47:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 19:47:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-08-22 19:47:22,529 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-08-22 19:47:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:22,530 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-08-22 19:47:22,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 19:47:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-08-22 19:47:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 19:47:22,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:22,531 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 19:47:22,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 19:47:22,531 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-08-22 19:47:22,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:22,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006412468] [2020-08-22 19:47:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:22,542 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:24,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:24,572 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 19:47:24,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006412468] [2020-08-22 19:47:24,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:24,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-08-22 19:47:24,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716772730] [2020-08-22 19:47:24,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 19:47:24,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:24,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 19:47:24,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:47:24,575 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-08-22 19:47:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:27,984 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-08-22 19:47:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-08-22 19:47:27,985 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-08-22 19:47:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:27,987 INFO L225 Difference]: With dead ends: 191 [2020-08-22 19:47:27,987 INFO L226 Difference]: Without dead ends: 185 [2020-08-22 19:47:27,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-08-22 19:47:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-08-22 19:47:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-08-22 19:47:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-22 19:47:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-08-22 19:47:27,993 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-08-22 19:47:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:27,994 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-08-22 19:47:27,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 19:47:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-08-22 19:47:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 19:47:27,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:27,995 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 19:47:27,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 19:47:27,995 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-08-22 19:47:27,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:27,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964185159] [2020-08-22 19:47:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:28,004 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:30,279 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 19:47:30,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964185159] [2020-08-22 19:47:30,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:30,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-08-22 19:47:30,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399988775] [2020-08-22 19:47:30,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 19:47:30,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:30,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 19:47:30,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 19:47:30,282 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-08-22 19:47:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:34,073 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-08-22 19:47:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 19:47:34,074 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-08-22 19:47:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:34,076 INFO L225 Difference]: With dead ends: 196 [2020-08-22 19:47:34,076 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 19:47:34,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-08-22 19:47:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 19:47:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-08-22 19:47:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-08-22 19:47:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-08-22 19:47:34,083 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-08-22 19:47:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:34,084 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-08-22 19:47:34,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 19:47:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-08-22 19:47:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 19:47:34,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:34,085 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 19:47:34,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 19:47:34,085 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-08-22 19:47:34,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:34,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374481174] [2020-08-22 19:47:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:34,089 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:36,449 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 19:47:36,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374481174] [2020-08-22 19:47:36,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:36,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-08-22 19:47:36,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764153889] [2020-08-22 19:47:36,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 19:47:36,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:36,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 19:47:36,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:47:36,451 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-08-22 19:47:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:40,379 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-08-22 19:47:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-08-22 19:47:40,380 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-08-22 19:47:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:40,381 INFO L225 Difference]: With dead ends: 201 [2020-08-22 19:47:40,382 INFO L226 Difference]: Without dead ends: 195 [2020-08-22 19:47:40,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-08-22 19:47:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-08-22 19:47:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-08-22 19:47:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 19:47:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-08-22 19:47:40,389 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-08-22 19:47:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:40,390 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-08-22 19:47:40,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 19:47:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-08-22 19:47:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-22 19:47:40,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:40,391 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 19:47:40,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 19:47:40,392 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-08-22 19:47:40,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:40,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924835532] [2020-08-22 19:47:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:40,402 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:42,988 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 19:47:42,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924835532] [2020-08-22 19:47:42,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:42,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-08-22 19:47:42,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923452992] [2020-08-22 19:47:42,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 19:47:42,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 19:47:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 19:47:42,990 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-08-22 19:47:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:47,131 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-08-22 19:47:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-08-22 19:47:47,132 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-08-22 19:47:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:47,134 INFO L225 Difference]: With dead ends: 206 [2020-08-22 19:47:47,134 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 19:47:47,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-08-22 19:47:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 19:47:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-08-22 19:47:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 19:47:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-08-22 19:47:47,142 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-08-22 19:47:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:47,143 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-08-22 19:47:47,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 19:47:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-08-22 19:47:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-08-22 19:47:47,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:47,144 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 19:47:47,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 19:47:47,144 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-08-22 19:47:47,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:47,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911735948] [2020-08-22 19:47:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:47,156 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,879 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 19:47:49,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911735948] [2020-08-22 19:47:49,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-08-22 19:47:49,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641449733] [2020-08-22 19:47:49,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 19:47:49,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 19:47:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:47:49,881 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-08-22 19:47:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:54,087 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-08-22 19:47:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-08-22 19:47:54,088 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-08-22 19:47:54,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:54,090 INFO L225 Difference]: With dead ends: 211 [2020-08-22 19:47:54,090 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 19:47:54,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-08-22 19:47:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 19:47:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-08-22 19:47:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-22 19:47:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-08-22 19:47:54,099 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-08-22 19:47:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:54,100 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-08-22 19:47:54,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 19:47:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-08-22 19:47:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-22 19:47:54,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:54,101 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 19:47:54,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 19:47:54,102 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-08-22 19:47:54,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:54,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440340162] [2020-08-22 19:47:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:54,114 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,134 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 19:47:57,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440340162] [2020-08-22 19:47:57,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-08-22 19:47:57,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963111982] [2020-08-22 19:47:57,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 19:47:57,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 19:47:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 19:47:57,135 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-08-22 19:48:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:01,830 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-08-22 19:48:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-08-22 19:48:01,831 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-08-22 19:48:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:01,832 INFO L225 Difference]: With dead ends: 216 [2020-08-22 19:48:01,833 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 19:48:01,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-08-22 19:48:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 19:48:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-08-22 19:48:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 19:48:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-08-22 19:48:01,840 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-08-22 19:48:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:01,841 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-08-22 19:48:01,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 19:48:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-08-22 19:48:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 19:48:01,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:01,842 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 19:48:01,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 19:48:01,842 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-08-22 19:48:01,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:01,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479689723] [2020-08-22 19:48:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:01,856 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:05,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:05,036 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 19:48:05,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479689723] [2020-08-22 19:48:05,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:05,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-08-22 19:48:05,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924950237] [2020-08-22 19:48:05,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 19:48:05,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 19:48:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:48:05,038 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-08-22 19:48:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:10,249 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-08-22 19:48:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-08-22 19:48:10,250 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-08-22 19:48:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:10,252 INFO L225 Difference]: With dead ends: 221 [2020-08-22 19:48:10,252 INFO L226 Difference]: Without dead ends: 215 [2020-08-22 19:48:10,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-08-22 19:48:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-08-22 19:48:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-08-22 19:48:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 19:48:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-08-22 19:48:10,260 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-08-22 19:48:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:10,260 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-08-22 19:48:10,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 19:48:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-08-22 19:48:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-08-22 19:48:10,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:10,262 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 19:48:10,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 19:48:10,262 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:10,262 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-08-22 19:48:10,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:10,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522875493] [2020-08-22 19:48:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:10,272 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,663 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 19:48:13,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522875493] [2020-08-22 19:48:13,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:13,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-08-22 19:48:13,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536473170] [2020-08-22 19:48:13,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 19:48:13,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:13,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 19:48:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 19:48:13,665 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-08-22 19:48:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:19,129 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-08-22 19:48:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-08-22 19:48:19,130 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-08-22 19:48:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:19,133 INFO L225 Difference]: With dead ends: 226 [2020-08-22 19:48:19,133 INFO L226 Difference]: Without dead ends: 220 [2020-08-22 19:48:19,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-08-22 19:48:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-08-22 19:48:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-08-22 19:48:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-08-22 19:48:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-08-22 19:48:19,140 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-08-22 19:48:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:19,140 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-08-22 19:48:19,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 19:48:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-08-22 19:48:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 19:48:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:19,142 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 19:48:19,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 19:48:19,142 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-08-22 19:48:19,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:19,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38661464] [2020-08-22 19:48:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:19,148 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:22,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:22,752 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 19:48:22,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38661464] [2020-08-22 19:48:22,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:22,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-08-22 19:48:22,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360694744] [2020-08-22 19:48:22,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 19:48:22,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:22,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 19:48:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 19:48:22,754 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-08-22 19:48:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:28,501 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-08-22 19:48:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-08-22 19:48:28,502 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-08-22 19:48:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:28,504 INFO L225 Difference]: With dead ends: 231 [2020-08-22 19:48:28,504 INFO L226 Difference]: Without dead ends: 225 [2020-08-22 19:48:28,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-08-22 19:48:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-08-22 19:48:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-08-22 19:48:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 19:48:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-08-22 19:48:28,523 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-08-22 19:48:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:28,523 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-08-22 19:48:28,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 19:48:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-08-22 19:48:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-08-22 19:48:28,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:28,524 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 19:48:28,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 19:48:28,524 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-08-22 19:48:28,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:28,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368554061] [2020-08-22 19:48:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:28,528 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:32,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:32,386 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 19:48:32,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368554061] [2020-08-22 19:48:32,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:32,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-08-22 19:48:32,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960313299] [2020-08-22 19:48:32,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 19:48:32,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:32,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 19:48:32,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 19:48:32,389 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-08-22 19:48:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:38,612 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-08-22 19:48:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-08-22 19:48:38,613 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-08-22 19:48:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:38,615 INFO L225 Difference]: With dead ends: 236 [2020-08-22 19:48:38,615 INFO L226 Difference]: Without dead ends: 230 [2020-08-22 19:48:38,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-08-22 19:48:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-08-22 19:48:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-08-22 19:48:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-22 19:48:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-08-22 19:48:38,622 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-08-22 19:48:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:38,623 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-08-22 19:48:38,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 19:48:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-08-22 19:48:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-08-22 19:48:38,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:38,624 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 19:48:38,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 19:48:38,625 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-08-22 19:48:38,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:38,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374100613] [2020-08-22 19:48:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:38,628 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:42,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:42,748 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 19:48:42,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374100613] [2020-08-22 19:48:42,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:42,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-08-22 19:48:42,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58200891] [2020-08-22 19:48:42,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 19:48:42,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 19:48:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 19:48:42,750 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-08-22 19:48:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:49,103 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-08-22 19:48:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-08-22 19:48:49,104 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-08-22 19:48:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:49,106 INFO L225 Difference]: With dead ends: 241 [2020-08-22 19:48:49,107 INFO L226 Difference]: Without dead ends: 235 [2020-08-22 19:48:49,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-08-22 19:48:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-08-22 19:48:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-08-22 19:48:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 19:48:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-08-22 19:48:49,115 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-08-22 19:48:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:49,115 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-08-22 19:48:49,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 19:48:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-08-22 19:48:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-08-22 19:48:49,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:49,117 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 19:48:49,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 19:48:49,117 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-08-22 19:48:49,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:49,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224400967] [2020-08-22 19:48:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:49,129 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:53,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:53,312 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 19:48:53,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224400967] [2020-08-22 19:48:53,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:53,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-08-22 19:48:53,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826061866] [2020-08-22 19:48:53,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 19:48:53,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:53,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 19:48:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 19:48:53,314 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-08-22 19:48:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:59,937 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-08-22 19:48:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-08-22 19:48:59,938 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-08-22 19:48:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:59,940 INFO L225 Difference]: With dead ends: 246 [2020-08-22 19:48:59,940 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 19:48:59,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-08-22 19:48:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 19:48:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-08-22 19:48:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-08-22 19:48:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-08-22 19:48:59,949 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-08-22 19:48:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:59,949 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-08-22 19:48:59,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 19:48:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-08-22 19:48:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 19:48:59,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:59,951 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 19:48:59,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 19:48:59,951 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-08-22 19:48:59,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:59,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324189333] [2020-08-22 19:48:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:59,962 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,454 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 19:49:04,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324189333] [2020-08-22 19:49:04,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:04,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-08-22 19:49:04,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677609050] [2020-08-22 19:49:04,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 19:49:04,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 19:49:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 19:49:04,457 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-08-22 19:49:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:11,585 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-08-22 19:49:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-08-22 19:49:11,586 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-08-22 19:49:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:11,588 INFO L225 Difference]: With dead ends: 251 [2020-08-22 19:49:11,588 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 19:49:11,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-08-22 19:49:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 19:49:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-08-22 19:49:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-08-22 19:49:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-08-22 19:49:11,595 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-08-22 19:49:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:11,596 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-08-22 19:49:11,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 19:49:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-08-22 19:49:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 19:49:11,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:11,598 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 19:49:11,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 19:49:11,598 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-08-22 19:49:11,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:11,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313468057] [2020-08-22 19:49:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:11,613 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:16,406 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 19:49:16,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313468057] [2020-08-22 19:49:16,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:16,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-08-22 19:49:16,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226811111] [2020-08-22 19:49:16,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 19:49:16,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 19:49:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 19:49:16,408 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-08-22 19:49:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:24,001 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-08-22 19:49:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-08-22 19:49:24,003 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-08-22 19:49:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:24,005 INFO L225 Difference]: With dead ends: 256 [2020-08-22 19:49:24,005 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 19:49:24,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-08-22 19:49:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 19:49:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-08-22 19:49:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-08-22 19:49:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-08-22 19:49:24,013 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-08-22 19:49:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:24,013 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-08-22 19:49:24,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 19:49:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-08-22 19:49:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 19:49:24,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:24,015 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 19:49:24,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 19:49:24,015 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-08-22 19:49:24,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:24,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065349915] [2020-08-22 19:49:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:24,019 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:29,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:29,178 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 19:49:29,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065349915] [2020-08-22 19:49:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:29,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-08-22 19:49:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319321359] [2020-08-22 19:49:29,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 19:49:29,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 19:49:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 19:49:29,180 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-08-22 19:49:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:37,568 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-08-22 19:49:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-08-22 19:49:37,569 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-08-22 19:49:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:37,571 INFO L225 Difference]: With dead ends: 261 [2020-08-22 19:49:37,571 INFO L226 Difference]: Without dead ends: 255 [2020-08-22 19:49:37,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-08-22 19:49:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-08-22 19:49:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-08-22 19:49:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 19:49:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-08-22 19:49:37,580 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-08-22 19:49:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:37,581 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-08-22 19:49:37,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 19:49:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-08-22 19:49:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-22 19:49:37,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:37,583 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 19:49:37,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 19:49:37,583 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-08-22 19:49:37,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:37,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523127525] [2020-08-22 19:49:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:37,589 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:43,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:43,116 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 19:49:43,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523127525] [2020-08-22 19:49:43,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:43,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-08-22 19:49:43,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548141716] [2020-08-22 19:49:43,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-08-22 19:49:43,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-08-22 19:49:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 19:49:43,119 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-08-22 19:49:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:52,088 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-08-22 19:49:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-08-22 19:49:52,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-08-22 19:49:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:52,091 INFO L225 Difference]: With dead ends: 266 [2020-08-22 19:49:52,091 INFO L226 Difference]: Without dead ends: 260 [2020-08-22 19:49:52,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-08-22 19:49:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-08-22 19:49:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-08-22 19:49:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-08-22 19:49:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-08-22 19:49:52,100 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-08-22 19:49:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:52,100 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-08-22 19:49:52,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-08-22 19:49:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-08-22 19:49:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-08-22 19:49:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:52,102 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 19:49:52,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 19:49:52,102 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-08-22 19:49:52,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:52,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589720917] [2020-08-22 19:49:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:52,112 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:58,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:58,078 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 19:49:58,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589720917] [2020-08-22 19:49:58,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:58,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-08-22 19:49:58,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434016668] [2020-08-22 19:49:58,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 19:49:58,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:58,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 19:49:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 19:49:58,080 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-08-22 19:50:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:07,770 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-08-22 19:50:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-08-22 19:50:07,771 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-08-22 19:50:07,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:07,772 INFO L225 Difference]: With dead ends: 271 [2020-08-22 19:50:07,773 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 19:50:07,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-08-22 19:50:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 19:50:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-08-22 19:50:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-08-22 19:50:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-08-22 19:50:07,782 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-08-22 19:50:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:07,782 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-08-22 19:50:07,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 19:50:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-08-22 19:50:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-08-22 19:50:07,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:07,784 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 19:50:07,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 19:50:07,784 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-08-22 19:50:07,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:07,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340946009] [2020-08-22 19:50:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:07,794 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:14,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:14,382 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 19:50:14,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340946009] [2020-08-22 19:50:14,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:14,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-08-22 19:50:14,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020091959] [2020-08-22 19:50:14,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-08-22 19:50:14,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-08-22 19:50:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 19:50:14,384 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-08-22 19:50:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,952 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-08-22 19:50:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-08-22 19:50:24,953 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-08-22 19:50:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,955 INFO L225 Difference]: With dead ends: 276 [2020-08-22 19:50:24,955 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 19:50:24,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-08-22 19:50:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 19:50:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-08-22 19:50:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 19:50:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-08-22 19:50:24,963 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-08-22 19:50:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,963 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-08-22 19:50:24,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-08-22 19:50:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-08-22 19:50:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-08-22 19:50:24,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,965 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 19:50:24,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 19:50:24,965 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-08-22 19:50:24,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327039959] [2020-08-22 19:50:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,978 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:32,138 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 19:50:32,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327039959] [2020-08-22 19:50:32,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:32,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-08-22 19:50:32,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951213991] [2020-08-22 19:50:32,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-08-22 19:50:32,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-08-22 19:50:32,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 19:50:32,141 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-08-22 19:50:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:43,670 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-08-22 19:50:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-08-22 19:50:43,672 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-08-22 19:50:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:43,674 INFO L225 Difference]: With dead ends: 281 [2020-08-22 19:50:43,674 INFO L226 Difference]: Without dead ends: 275 [2020-08-22 19:50:43,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-08-22 19:50:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-22 19:50:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-08-22 19:50:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-22 19:50:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-08-22 19:50:43,683 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-08-22 19:50:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:43,683 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-08-22 19:50:43,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-08-22 19:50:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-08-22 19:50:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-08-22 19:50:43,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:43,685 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 19:50:43,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 19:50:43,685 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-08-22 19:50:43,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:43,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852545291] [2020-08-22 19:50:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:43,695 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:51,582 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 19:50:51,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852545291] [2020-08-22 19:50:51,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:51,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-08-22 19:50:51,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907389347] [2020-08-22 19:50:51,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-08-22 19:50:51,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:51,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-08-22 19:50:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-08-22 19:50:51,585 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-08-22 19:51:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:04,370 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-08-22 19:51:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-08-22 19:51:04,372 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-08-22 19:51:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:04,374 INFO L225 Difference]: With dead ends: 286 [2020-08-22 19:51:04,375 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 19:51:04,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-08-22 19:51:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 19:51:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-08-22 19:51:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-08-22 19:51:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-08-22 19:51:04,383 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-08-22 19:51:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:04,383 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-08-22 19:51:04,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-08-22 19:51:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-08-22 19:51:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-22 19:51:04,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:04,385 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 19:51:04,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 19:51:04,385 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-08-22 19:51:04,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:04,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674727768] [2020-08-22 19:51:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:04,396 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:13,293 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 19:51:13,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674727768] [2020-08-22 19:51:13,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:13,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-08-22 19:51:13,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932337973] [2020-08-22 19:51:13,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-08-22 19:51:13,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:13,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-08-22 19:51:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 19:51:13,295 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-08-22 19:51:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:27,127 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-08-22 19:51:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-08-22 19:51:27,128 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-08-22 19:51:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:27,130 INFO L225 Difference]: With dead ends: 291 [2020-08-22 19:51:27,130 INFO L226 Difference]: Without dead ends: 285 [2020-08-22 19:51:27,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-08-22 19:51:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-08-22 19:51:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-08-22 19:51:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-22 19:51:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-08-22 19:51:27,137 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-08-22 19:51:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:27,138 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-08-22 19:51:27,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-08-22 19:51:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-08-22 19:51:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-08-22 19:51:27,139 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:27,139 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 19:51:27,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 19:51:27,139 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-08-22 19:51:27,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:27,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355628501] [2020-08-22 19:51:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:27,148 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:37,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:37,218 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 19:51:37,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355628501] [2020-08-22 19:51:37,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:37,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-08-22 19:51:37,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957819406] [2020-08-22 19:51:37,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-08-22 19:51:37,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:37,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-08-22 19:51:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-08-22 19:51:37,220 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-08-22 19:51:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:53,203 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-08-22 19:51:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-08-22 19:51:53,205 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-08-22 19:51:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:53,207 INFO L225 Difference]: With dead ends: 296 [2020-08-22 19:51:53,208 INFO L226 Difference]: Without dead ends: 290 [2020-08-22 19:51:53,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-08-22 19:51:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-08-22 19:51:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-08-22 19:51:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-22 19:51:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-08-22 19:51:53,215 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-08-22 19:51:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:53,215 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-08-22 19:51:53,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-08-22 19:51:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-08-22 19:51:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-08-22 19:51:53,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:53,218 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 19:51:53,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 19:51:53,218 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-08-22 19:51:53,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:53,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19396973] [2020-08-22 19:51:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:53,230 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:04,040 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 19:52:04,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19396973] [2020-08-22 19:52:04,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:04,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-08-22 19:52:04,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294995352] [2020-08-22 19:52:04,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-08-22 19:52:04,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-08-22 19:52:04,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-08-22 19:52:04,043 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-08-22 19:52:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:21,707 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-08-22 19:52:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-08-22 19:52:21,709 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-08-22 19:52:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:21,710 INFO L225 Difference]: With dead ends: 301 [2020-08-22 19:52:21,710 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 19:52:21,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-08-22 19:52:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 19:52:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-08-22 19:52:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-08-22 19:52:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-08-22 19:52:21,720 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-08-22 19:52:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:21,720 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-08-22 19:52:21,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-08-22 19:52:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-08-22 19:52:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-08-22 19:52:21,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:21,722 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 19:52:21,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 19:52:21,723 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-08-22 19:52:21,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:21,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082970329] [2020-08-22 19:52:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:21,730 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:34,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:34,224 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 19:52:34,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082970329] [2020-08-22 19:52:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-08-22 19:52:34,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630158790] [2020-08-22 19:52:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-08-22 19:52:34,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-08-22 19:52:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-08-22 19:52:34,227 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-08-22 19:52:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:53,916 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-08-22 19:52:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-08-22 19:52:53,919 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-08-22 19:52:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:53,921 INFO L225 Difference]: With dead ends: 306 [2020-08-22 19:52:53,921 INFO L226 Difference]: Without dead ends: 300 [2020-08-22 19:52:53,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-08-22 19:52:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-08-22 19:52:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-08-22 19:52:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-08-22 19:52:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-08-22 19:52:53,930 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-08-22 19:52:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:53,930 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-08-22 19:52:53,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-08-22 19:52:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-08-22 19:52:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-08-22 19:52:53,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:53,932 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 19:52:53,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 19:52:53,933 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-08-22 19:52:53,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:53,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79757072] [2020-08-22 19:52:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:53,941 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:07,446 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 19:53:07,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79757072] [2020-08-22 19:53:07,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:07,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-08-22 19:53:07,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229823888] [2020-08-22 19:53:07,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-08-22 19:53:07,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-08-22 19:53:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 19:53:07,448 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-08-22 19:53:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:29,398 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-08-22 19:53:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-08-22 19:53:29,401 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-08-22 19:53:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:29,404 INFO L225 Difference]: With dead ends: 311 [2020-08-22 19:53:29,404 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 19:53:29,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-08-22 19:53:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 19:53:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-08-22 19:53:29,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-08-22 19:53:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-08-22 19:53:29,411 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-08-22 19:53:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:29,412 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-08-22 19:53:29,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-08-22 19:53:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-08-22 19:53:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-08-22 19:53:29,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:29,414 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 19:53:29,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 19:53:29,414 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-08-22 19:53:29,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:29,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943923097] [2020-08-22 19:53:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:29,426 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:45,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:45,299 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 19:53:45,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943923097] [2020-08-22 19:53:45,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:45,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-08-22 19:53:45,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133596639] [2020-08-22 19:53:45,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-08-22 19:53:45,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-08-22 19:53:45,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-08-22 19:53:45,301 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-08-22 19:54:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:09,555 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-08-22 19:54:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-08-22 19:54:09,557 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-08-22 19:54:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:09,559 INFO L225 Difference]: With dead ends: 316 [2020-08-22 19:54:09,560 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 19:54:09,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-08-22 19:54:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 19:54:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-08-22 19:54:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 19:54:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-08-22 19:54:09,567 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-08-22 19:54:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:09,568 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-08-22 19:54:09,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-08-22 19:54:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-08-22 19:54:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-08-22 19:54:09,570 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:09,570 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 19:54:09,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 19:54:09,571 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-08-22 19:54:09,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:09,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716151296] [2020-08-22 19:54:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:09,581 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:25,916 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 19:54:25,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716151296] [2020-08-22 19:54:25,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:25,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-08-22 19:54:25,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648085008] [2020-08-22 19:54:25,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-08-22 19:54:25,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-08-22 19:54:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-08-22 19:54:25,918 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-08-22 19:54:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:52,332 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-08-22 19:54:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-08-22 19:54:52,336 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-08-22 19:54:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:52,338 INFO L225 Difference]: With dead ends: 321 [2020-08-22 19:54:52,338 INFO L226 Difference]: Without dead ends: 315 [2020-08-22 19:54:52,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-08-22 19:54:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-22 19:54:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-08-22 19:54:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 19:54:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-08-22 19:54:52,348 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-08-22 19:54:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:52,348 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-08-22 19:54:52,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-08-22 19:54:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-08-22 19:54:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-22 19:54:52,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:52,350 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 19:54:52,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 19:54:52,351 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-08-22 19:54:52,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:52,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963179114] [2020-08-22 19:54:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:52,362 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:09,689 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 19:55:09,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963179114] [2020-08-22 19:55:09,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:09,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-08-22 19:55:09,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389508749] [2020-08-22 19:55:09,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-08-22 19:55:09,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-08-22 19:55:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-08-22 19:55:09,692 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states. [2020-08-22 19:55:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:38,314 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-08-22 19:55:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-08-22 19:55:38,318 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 311 [2020-08-22 19:55:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:38,321 INFO L225 Difference]: With dead ends: 326 [2020-08-22 19:55:38,321 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 19:55:38,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-08-22 19:55:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 19:55:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-08-22 19:55:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-08-22 19:55:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2020-08-22 19:55:38,329 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 311 [2020-08-22 19:55:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:38,329 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2020-08-22 19:55:38,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-08-22 19:55:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2020-08-22 19:55:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-08-22 19:55:38,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:38,331 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 19:55:38,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 19:55:38,331 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash -813344007, now seen corresponding path program 60 times [2020-08-22 19:55:38,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:38,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347009999] [2020-08-22 19:55:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:38,335 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:57,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:57,955 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 19:55:57,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347009999] [2020-08-22 19:55:57,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:57,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2020-08-22 19:55:57,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296719623] [2020-08-22 19:55:57,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-08-22 19:55:57,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:57,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-08-22 19:55:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 19:55:57,957 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 124 states. [2020-08-22 19:56:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:29,207 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-08-22 19:56:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-08-22 19:56:29,212 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 316 [2020-08-22 19:56:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:29,214 INFO L225 Difference]: With dead ends: 331 [2020-08-22 19:56:29,214 INFO L226 Difference]: Without dead ends: 325 [2020-08-22 19:56:29,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-08-22 19:56:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-08-22 19:56:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-08-22 19:56:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-08-22 19:56:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2020-08-22 19:56:29,225 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 316 [2020-08-22 19:56:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:29,226 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2020-08-22 19:56:29,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-08-22 19:56:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2020-08-22 19:56:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-08-22 19:56:29,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:29,228 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 19:56:29,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 19:56:29,228 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -225742953, now seen corresponding path program 61 times [2020-08-22 19:56:29,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:29,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416093049] [2020-08-22 19:56:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:29,241 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:50,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:50,934 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 19:56:50,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416093049] [2020-08-22 19:56:50,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:50,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-08-22 19:56:50,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271072706] [2020-08-22 19:56:50,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-08-22 19:56:50,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-08-22 19:56:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-08-22 19:56:50,936 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 126 states. [2020-08-22 19:57:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:25,957 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2020-08-22 19:57:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-08-22 19:57:25,961 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 321 [2020-08-22 19:57:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:25,963 INFO L225 Difference]: With dead ends: 336 [2020-08-22 19:57:25,963 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 19:57:25,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-08-22 19:57:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 19:57:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-08-22 19:57:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-08-22 19:57:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2020-08-22 19:57:25,972 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 321 [2020-08-22 19:57:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:25,973 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2020-08-22 19:57:25,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-08-22 19:57:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2020-08-22 19:57:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-08-22 19:57:25,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:25,975 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 19:57:25,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 19:57:25,975 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:25,976 INFO L82 PathProgramCache]: Analyzing trace with hash -238056007, now seen corresponding path program 62 times [2020-08-22 19:57:25,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:25,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208463043] [2020-08-22 19:57:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:25,987 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:50,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:50,313 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 19:57:50,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208463043] [2020-08-22 19:57:50,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:50,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2020-08-22 19:57:50,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806183031] [2020-08-22 19:57:50,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-08-22 19:57:50,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-08-22 19:57:50,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-08-22 19:57:50,317 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 128 states. [2020-08-22 19:58:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:58:27,709 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2020-08-22 19:58:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-08-22 19:58:27,715 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 326 [2020-08-22 19:58:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:58:27,718 INFO L225 Difference]: With dead ends: 341 [2020-08-22 19:58:27,718 INFO L226 Difference]: Without dead ends: 335 [2020-08-22 19:58:27,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-08-22 19:58:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-22 19:58:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-08-22 19:58:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-08-22 19:58:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2020-08-22 19:58:27,727 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 326 [2020-08-22 19:58:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:58:27,728 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2020-08-22 19:58:27,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-08-22 19:58:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2020-08-22 19:58:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-08-22 19:58:27,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:58:27,729 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 19:58:27,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 19:58:27,730 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:58:27,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:58:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1215493335, now seen corresponding path program 63 times [2020-08-22 19:58:27,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:58:27,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962213326] [2020-08-22 19:58:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:58:27,736 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:58:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:50,533 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 19:58:50,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962213326] [2020-08-22 19:58:50,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:50,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2020-08-22 19:58:50,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582537908] [2020-08-22 19:58:50,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-08-22 19:58:50,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:50,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-08-22 19:58:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-08-22 19:58:50,535 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 130 states. [2020-08-22 19:59:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:59:25,736 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2020-08-22 19:59:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-08-22 19:59:25,740 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 331 [2020-08-22 19:59:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:59:25,743 INFO L225 Difference]: With dead ends: 346 [2020-08-22 19:59:25,743 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 19:59:25,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11906 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=20480, Invalid=44800, Unknown=0, NotChecked=0, Total=65280 [2020-08-22 19:59:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 19:59:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2020-08-22 19:59:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-08-22 19:59:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2020-08-22 19:59:25,751 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 331 [2020-08-22 19:59:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:59:25,751 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2020-08-22 19:59:25,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 130 states. [2020-08-22 19:59:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2020-08-22 19:59:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-08-22 19:59:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:25,754 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 19:59:25,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 19:59:25,754 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:25,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1777774471, now seen corresponding path program 64 times [2020-08-22 19:59:25,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:25,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15797184] [2020-08-22 19:59:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:25,761 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat