/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:28,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:28,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:28,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:28,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:28,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:28,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:28,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:16:28,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:28,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:28,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:28,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:28,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:28,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:28,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:28,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:28,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:28,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:28,978 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:29,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:29,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:29,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:29,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:29,250 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:29,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 23:16:29,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe3397cd/394f92d1269e4a4e810a8f0dd85f52aa/FLAG55c861cc0 [2021-05-02 23:16:29,590 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:29,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2021-05-02 23:16:29,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe3397cd/394f92d1269e4a4e810a8f0dd85f52aa/FLAG55c861cc0 [2021-05-02 23:16:30,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe3397cd/394f92d1269e4a4e810a8f0dd85f52aa [2021-05-02 23:16:30,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:30,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:30,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:30,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:30,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:30,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e0a3e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30, skipping insertion in model container [2021-05-02 23:16:30,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:30,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:30,128 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 23:16:30,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:30,144 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:30,152 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2021-05-02 23:16:30,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:30,163 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:30,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30 WrapperNode [2021-05-02 23:16:30,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:30,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:30,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:30,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:30,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (1/1) ... [2021-05-02 23:16:30,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:30,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:30,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:30,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:30,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (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 [2021-05-02 23:16:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:30,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:30,294 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:30,294 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:16:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:16:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:16:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:30,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:30,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:30,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:30,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:30,501 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:16:30,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:30 BoogieIcfgContainer [2021-05-02 23:16:30,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:30,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:30,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:30,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:30,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:30" (1/3) ... [2021-05-02 23:16:30,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546dd2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:30, skipping insertion in model container [2021-05-02 23:16:30,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:30" (2/3) ... [2021-05-02 23:16:30,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546dd2dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:30, skipping insertion in model container [2021-05-02 23:16:30,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:30" (3/3) ... [2021-05-02 23:16:30,517 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2021-05-02 23:16:30,521 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:30,523 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:30,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:30,562 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:30,563 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:30,563 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:30,563 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:30,563 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:30,563 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:30,563 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:30,563 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:16:30,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,600 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,600 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2021-05-02 23:16:30,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230877032] [2021-05-02 23:16:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,646 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,733 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230877032] [2021-05-02 23:16:30,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230877032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:30,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525848798] [2021-05-02 23:16:30,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:30,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:30,746 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,792 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 23:16:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 23:16:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,797 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:16:30,797 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:16:30,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:16:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:16:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 23:16:30,820 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-05-02 23:16:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,821 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 23:16:30,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 23:16:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:16:30,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,822 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:30,822 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2021-05-02 23:16:30,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099690016] [2021-05-02 23:16:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,825 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,881 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099690016] [2021-05-02 23:16:30,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099690016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:30,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131764703] [2021-05-02 23:16:30,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:30,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:30,883 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,954 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 23:16:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:30,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:16:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,957 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:16:30,957 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:16:30,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:16:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-05-02 23:16:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 23:16:30,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-02 23:16:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,962 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 23:16:30,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 23:16:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:16:30,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,963 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:30,963 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2021-05-02 23:16:30,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281401514] [2021-05-02 23:16:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,984 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,049 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281401514] [2021-05-02 23:16:31,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [281401514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31441239] [2021-05-02 23:16:31,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:31,051 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,118 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 23:16:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:31,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:16:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,119 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:16:31,119 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:16:31,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:16:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-05-02 23:16:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 23:16:31,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-05-02 23:16:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,123 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 23:16:31,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 23:16:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:16:31,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,124 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:31,124 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash -890617981, now seen corresponding path program 2 times [2021-05-02 23:16:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198517706] [2021-05-02 23:16:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,129 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,130 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198517706] [2021-05-02 23:16:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1198517706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:31,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880688129] [2021-05-02 23:16:31,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:31,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:31,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:31,193 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,290 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 23:16:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:16:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,292 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:16:31,292 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:16:31,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:16:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 23:16:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 23:16:31,305 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-02 23:16:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,305 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 23:16:31,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 23:16:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:16:31,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,307 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:31,307 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 1 times [2021-05-02 23:16:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136327871] [2021-05-02 23:16:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,313 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,315 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,391 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136327871] [2021-05-02 23:16:31,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136327871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082014643] [2021-05-02 23:16:31,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:31,393 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,498 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 23:16:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:16:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,499 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:16:31,499 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:16:31,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:16:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-05-02 23:16:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-05-02 23:16:31,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2021-05-02 23:16:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,516 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-05-02 23:16:31,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-05-02 23:16:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:16:31,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,517 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:31,518 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 2 times [2021-05-02 23:16:31,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321897881] [2021-05-02 23:16:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,526 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,527 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,600 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321897881] [2021-05-02 23:16:31,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321897881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755925265] [2021-05-02 23:16:31,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:31,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:31,602 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,654 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-05-02 23:16:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:16:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,656 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:16:31,656 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 23:16:31,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 23:16:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-05-02 23:16:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-05-02 23:16:31,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-05-02 23:16:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,662 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-05-02 23:16:31,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-05-02 23:16:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:16:31,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,663 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:31,663 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,664 INFO L82 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 3 times [2021-05-02 23:16:31,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543104104] [2021-05-02 23:16:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,670 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,673 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,738 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543104104] [2021-05-02 23:16:31,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [543104104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:31,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573804839] [2021-05-02 23:16:31,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:31,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:31,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:31,740 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,800 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 23:16:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:16:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,802 INFO L225 Difference]: With dead ends: 61 [2021-05-02 23:16:31,802 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:16:31,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:16:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-05-02 23:16:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 23:16:31,810 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2021-05-02 23:16:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,810 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 23:16:31,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 23:16:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:16:31,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,811 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:31,811 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 4 times [2021-05-02 23:16:31,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506532429] [2021-05-02 23:16:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,817 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,818 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506532429] [2021-05-02 23:16:31,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [506532429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:31,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138769330] [2021-05-02 23:16:31,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:31,898 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,963 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-05-02 23:16:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:31,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:16:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,964 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:16:31,964 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:16:31,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:16:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-05-02 23:16:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 23:16:31,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2021-05-02 23:16:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,968 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 23:16:31,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 23:16:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:16:31,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,969 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:31,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 5 times [2021-05-02 23:16:31,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086763372] [2021-05-02 23:16:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,973 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,974 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086763372] [2021-05-02 23:16:32,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086763372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:32,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624259624] [2021-05-02 23:16:32,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:32,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:32,062 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,139 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-05-02 23:16:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:16:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,140 INFO L225 Difference]: With dead ends: 75 [2021-05-02 23:16:32,140 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:16:32,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:16:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2021-05-02 23:16:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-02 23:16:32,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2021-05-02 23:16:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,144 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-02 23:16:32,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-02 23:16:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:16:32,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,145 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:32,145 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 6 times [2021-05-02 23:16:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657548136] [2021-05-02 23:16:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,149 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,149 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,230 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657548136] [2021-05-02 23:16:32,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [657548136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:32,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112844582] [2021-05-02 23:16:32,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:32,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:32,231 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,300 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-05-02 23:16:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:16:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,301 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:16:32,301 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:16:32,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:16:32,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-05-02 23:16:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 23:16:32,317 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2021-05-02 23:16:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,317 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 23:16:32,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 23:16:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:16:32,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,318 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:32,318 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 7 times [2021-05-02 23:16:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100041087] [2021-05-02 23:16:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,326 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,328 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,418 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100041087] [2021-05-02 23:16:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1100041087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163198200] [2021-05-02 23:16:32,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:32,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:32,420 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,501 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-05-02 23:16:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 23:16:32,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,502 INFO L225 Difference]: With dead ends: 89 [2021-05-02 23:16:32,502 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:16:32,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:16:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-05-02 23:16:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-05-02 23:16:32,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2021-05-02 23:16:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,510 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-05-02 23:16:32,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-05-02 23:16:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:16:32,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,510 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:32,511 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 8 times [2021-05-02 23:16:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744154125] [2021-05-02 23:16:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,517 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,620 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744154125] [2021-05-02 23:16:32,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [744154125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:32,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139600608] [2021-05-02 23:16:32,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:32,622 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,709 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-05-02 23:16:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:16:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,710 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:16:32,710 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 23:16:32,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 23:16:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2021-05-02 23:16:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 23:16:32,719 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2021-05-02 23:16:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,721 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 23:16:32,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 23:16:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:16:32,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,721 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:32,721 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 9 times [2021-05-02 23:16:32,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230112093] [2021-05-02 23:16:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,730 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,732 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230112093] [2021-05-02 23:16:32,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230112093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:32,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342519895] [2021-05-02 23:16:32,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:32,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:32,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:32,838 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,929 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-05-02 23:16:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 23:16:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,930 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:16:32,930 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:16:32,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:16:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2021-05-02 23:16:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 23:16:32,932 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2021-05-02 23:16:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,933 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 23:16:32,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 23:16:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:16:32,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,933 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:32,933 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 10 times [2021-05-02 23:16:32,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733978992] [2021-05-02 23:16:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,937 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,938 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,031 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733978992] [2021-05-02 23:16:33,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [733978992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:33,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690574054] [2021-05-02 23:16:33,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:33,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:33,032 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,135 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2021-05-02 23:16:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 23:16:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,137 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:33,137 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:16:33,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:16:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-05-02 23:16:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 23:16:33,140 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2021-05-02 23:16:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,140 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 23:16:33,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 23:16:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:16:33,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,142 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:33,142 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 11 times [2021-05-02 23:16:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617873620] [2021-05-02 23:16:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,148 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,149 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617873620] [2021-05-02 23:16:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [617873620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319713771] [2021-05-02 23:16:33,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:33,283 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,384 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2021-05-02 23:16:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:33,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:16:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,385 INFO L225 Difference]: With dead ends: 117 [2021-05-02 23:16:33,385 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 23:16:33,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 23:16:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2021-05-02 23:16:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-05-02 23:16:33,388 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-05-02 23:16:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,388 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-05-02 23:16:33,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-05-02 23:16:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:16:33,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,389 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:33,389 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 12 times [2021-05-02 23:16:33,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957429422] [2021-05-02 23:16:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,393 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,394 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,505 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957429422] [2021-05-02 23:16:33,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [957429422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:33,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937417462] [2021-05-02 23:16:33,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:33,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:33,507 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,613 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-05-02 23:16:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 23:16:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,614 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:16:33,614 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:16:33,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:16:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2021-05-02 23:16:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 23:16:33,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2021-05-02 23:16:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,617 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 23:16:33,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 23:16:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:16:33,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,617 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:33,618 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 13 times [2021-05-02 23:16:33,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348553444] [2021-05-02 23:16:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,622 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,622 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,743 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348553444] [2021-05-02 23:16:33,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348553444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:33,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955737940] [2021-05-02 23:16:33,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:33,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:33,744 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,865 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2021-05-02 23:16:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 23:16:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,866 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:16:33,866 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:16:33,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:16:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2021-05-02 23:16:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 23:16:33,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2021-05-02 23:16:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,869 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 23:16:33,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 23:16:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:33,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,869 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:33,870 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 14 times [2021-05-02 23:16:33,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590254151] [2021-05-02 23:16:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,874 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,874 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,999 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590254151] [2021-05-02 23:16:33,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1590254151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:34,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663350360] [2021-05-02 23:16:34,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:34,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:34,000 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,131 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2021-05-02 23:16:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,133 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:16:34,133 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:16:34,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:16:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2021-05-02 23:16:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-05-02 23:16:34,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2021-05-02 23:16:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,136 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-05-02 23:16:34,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-05-02 23:16:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:16:34,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,137 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:34,137 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 15 times [2021-05-02 23:16:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937768157] [2021-05-02 23:16:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,142 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,325 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937768157] [2021-05-02 23:16:34,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [937768157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:34,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783217923] [2021-05-02 23:16:34,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:34,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:34,327 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,473 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2021-05-02 23:16:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:34,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 23:16:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,474 INFO L225 Difference]: With dead ends: 145 [2021-05-02 23:16:34,475 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 23:16:34,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 23:16:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2021-05-02 23:16:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-05-02 23:16:34,478 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2021-05-02 23:16:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,478 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-05-02 23:16:34,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-05-02 23:16:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 23:16:34,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,479 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:34,479 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 16 times [2021-05-02 23:16:34,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370852482] [2021-05-02 23:16:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,484 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370852482] [2021-05-02 23:16:34,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [370852482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:34,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505061609] [2021-05-02 23:16:34,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:34,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:34,650 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,782 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2021-05-02 23:16:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 23:16:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,783 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:16:34,783 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:16:34,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:16:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2021-05-02 23:16:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-05-02 23:16:34,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2021-05-02 23:16:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,786 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-05-02 23:16:34,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-05-02 23:16:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:16:34,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,786 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:34,787 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 17 times [2021-05-02 23:16:34,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108611230] [2021-05-02 23:16:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,790 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,790 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108611230] [2021-05-02 23:16:34,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [108611230] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779808141] [2021-05-02 23:16:34,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:34,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:34,974 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,150 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2021-05-02 23:16:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:16:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,151 INFO L225 Difference]: With dead ends: 159 [2021-05-02 23:16:35,151 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 23:16:35,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 23:16:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2021-05-02 23:16:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-05-02 23:16:35,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2021-05-02 23:16:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,154 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-05-02 23:16:35,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-05-02 23:16:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:16:35,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,154 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:35,155 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 18 times [2021-05-02 23:16:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611005653] [2021-05-02 23:16:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,354 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611005653] [2021-05-02 23:16:35,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [611005653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:35,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387543319] [2021-05-02 23:16:35,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:35,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:35,355 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,498 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2021-05-02 23:16:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:16:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,501 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:16:35,501 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:16:35,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:16:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2021-05-02 23:16:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-05-02 23:16:35,504 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-05-02 23:16:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,504 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-05-02 23:16:35,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-05-02 23:16:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 23:16:35,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,504 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:35,504 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 19 times [2021-05-02 23:16:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651132130] [2021-05-02 23:16:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,508 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,509 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,720 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651132130] [2021-05-02 23:16:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651132130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041086463] [2021-05-02 23:16:35,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:35,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:35,721 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,862 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2021-05-02 23:16:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-02 23:16:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,863 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:16:35,863 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:16:35,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:16:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2021-05-02 23:16:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-02 23:16:35,865 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-05-02 23:16:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,866 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-02 23:16:35,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-02 23:16:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:16:35,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,866 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:35,866 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 20 times [2021-05-02 23:16:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994033798] [2021-05-02 23:16:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,870 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,870 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:36,088 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994033798] [2021-05-02 23:16:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [994033798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959034235] [2021-05-02 23:16:36,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:36,090 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,269 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2021-05-02 23:16:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:16:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,271 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:16:36,271 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:16:36,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:16:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2021-05-02 23:16:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-05-02 23:16:36,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2021-05-02 23:16:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,278 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-05-02 23:16:36,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-05-02 23:16:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:16:36,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,279 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:36,279 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 21 times [2021-05-02 23:16:36,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995651499] [2021-05-02 23:16:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,284 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:36,529 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995651499] [2021-05-02 23:16:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995651499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842249786] [2021-05-02 23:16:36,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:36,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:36,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:36,530 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,714 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2021-05-02 23:16:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-02 23:16:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,716 INFO L225 Difference]: With dead ends: 187 [2021-05-02 23:16:36,716 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:16:36,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:16:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2021-05-02 23:16:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-05-02 23:16:36,720 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2021-05-02 23:16:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,720 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-05-02 23:16:36,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-05-02 23:16:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:16:36,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,721 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:36,721 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 22 times [2021-05-02 23:16:36,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443440275] [2021-05-02 23:16:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,726 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,727 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:36,978 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443440275] [2021-05-02 23:16:36,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443440275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131189917] [2021-05-02 23:16:36,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:36,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:36,980 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,143 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2021-05-02 23:16:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 23:16:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,153 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:16:37,153 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:16:37,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:16:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2021-05-02 23:16:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-05-02 23:16:37,156 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-05-02 23:16:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,156 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-05-02 23:16:37,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-05-02 23:16:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:16:37,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,157 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:37,157 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 23 times [2021-05-02 23:16:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508690545] [2021-05-02 23:16:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,160 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,161 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,412 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508690545] [2021-05-02 23:16:37,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [508690545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:37,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947113619] [2021-05-02 23:16:37,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:37,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:37,413 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,581 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2021-05-02 23:16:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 23:16:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,586 INFO L225 Difference]: With dead ends: 201 [2021-05-02 23:16:37,586 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 23:16:37,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 23:16:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2021-05-02 23:16:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-05-02 23:16:37,589 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-05-02 23:16:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,590 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-05-02 23:16:37,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-05-02 23:16:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:16:37,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,590 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:37,590 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 24 times [2021-05-02 23:16:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983510300] [2021-05-02 23:16:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,594 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,595 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983510300] [2021-05-02 23:16:37,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983510300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:37,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236335204] [2021-05-02 23:16:37,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:37,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:37,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:37,913 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,142 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2021-05-02 23:16:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 23:16:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,143 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:16:38,143 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:16:38,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:16:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2021-05-02 23:16:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-05-02 23:16:38,146 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2021-05-02 23:16:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,147 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-05-02 23:16:38,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-05-02 23:16:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:16:38,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,147 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:38,147 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 25 times [2021-05-02 23:16:38,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696329787] [2021-05-02 23:16:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,157 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,157 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:38,471 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696329787] [2021-05-02 23:16:38,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [696329787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:38,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235982541] [2021-05-02 23:16:38,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:38,472 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,695 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2021-05-02 23:16:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:38,695 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 23:16:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,696 INFO L225 Difference]: With dead ends: 215 [2021-05-02 23:16:38,696 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 23:16:38,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 23:16:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2021-05-02 23:16:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-05-02 23:16:38,701 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2021-05-02 23:16:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,701 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-05-02 23:16:38,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-05-02 23:16:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:16:38,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,701 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:38,702 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 26 times [2021-05-02 23:16:38,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503077384] [2021-05-02 23:16:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,705 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:39,035 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503077384] [2021-05-02 23:16:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [503077384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831639055] [2021-05-02 23:16:39,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:39,036 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,229 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2021-05-02 23:16:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:39,230 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:16:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,231 INFO L225 Difference]: With dead ends: 222 [2021-05-02 23:16:39,231 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 23:16:39,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 23:16:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2021-05-02 23:16:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-05-02 23:16:39,234 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-05-02 23:16:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,234 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-05-02 23:16:39,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-05-02 23:16:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:16:39,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,235 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:39,235 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 27 times [2021-05-02 23:16:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455082386] [2021-05-02 23:16:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,239 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,241 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:39,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455082386] [2021-05-02 23:16:39,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [455082386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789552561] [2021-05-02 23:16:39,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:39,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:39,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:39,591 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,819 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2021-05-02 23:16:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 23:16:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,821 INFO L225 Difference]: With dead ends: 229 [2021-05-02 23:16:39,821 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:16:39,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:16:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2021-05-02 23:16:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-05-02 23:16:39,824 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-05-02 23:16:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,825 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-05-02 23:16:39,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-05-02 23:16:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:16:39,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,825 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:39,826 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 28 times [2021-05-02 23:16:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317155537] [2021-05-02 23:16:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,829 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,831 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:40,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317155537] [2021-05-02 23:16:40,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317155537] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:40,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381354515] [2021-05-02 23:16:40,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:40,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:40,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:40,211 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,442 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2021-05-02 23:16:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 23:16:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,443 INFO L225 Difference]: With dead ends: 236 [2021-05-02 23:16:40,443 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:16:40,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:16:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2021-05-02 23:16:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-05-02 23:16:40,449 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2021-05-02 23:16:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,449 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-05-02 23:16:40,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-05-02 23:16:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:16:40,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,450 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:40,450 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 29 times [2021-05-02 23:16:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092478640] [2021-05-02 23:16:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,454 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,455 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:40,878 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092478640] [2021-05-02 23:16:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092478640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795095737] [2021-05-02 23:16:40,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:40,879 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,163 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2021-05-02 23:16:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:41,185 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-02 23:16:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,186 INFO L225 Difference]: With dead ends: 243 [2021-05-02 23:16:41,186 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:16:41,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:16:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2021-05-02 23:16:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-05-02 23:16:41,189 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2021-05-02 23:16:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,189 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-05-02 23:16:41,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-05-02 23:16:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:16:41,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,190 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:41,190 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 30 times [2021-05-02 23:16:41,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881567334] [2021-05-02 23:16:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:41,193 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:41,194 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:41,641 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881567334] [2021-05-02 23:16:41,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881567334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:41,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821973136] [2021-05-02 23:16:41,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:41,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:41,642 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,920 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2021-05-02 23:16:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:41,921 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:16:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,921 INFO L225 Difference]: With dead ends: 250 [2021-05-02 23:16:41,922 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 23:16:41,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 23:16:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2021-05-02 23:16:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-05-02 23:16:41,925 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2021-05-02 23:16:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,925 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-05-02 23:16:41,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,925 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-05-02 23:16:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 23:16:41,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,925 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:41,925 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 31 times [2021-05-02 23:16:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678803992] [2021-05-02 23:16:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:41,929 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:41,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:42,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678803992] [2021-05-02 23:16:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678803992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783721967] [2021-05-02 23:16:42,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:42,378 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,663 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2021-05-02 23:16:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-02 23:16:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,666 INFO L225 Difference]: With dead ends: 257 [2021-05-02 23:16:42,666 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 23:16:42,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 23:16:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2021-05-02 23:16:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-05-02 23:16:42,669 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2021-05-02 23:16:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,669 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-05-02 23:16:42,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-05-02 23:16:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:16:42,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,669 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:42,669 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 32 times [2021-05-02 23:16:42,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257203762] [2021-05-02 23:16:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,674 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,675 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:43,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257203762] [2021-05-02 23:16:43,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257203762] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:43,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134808134] [2021-05-02 23:16:43,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:43,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:43,135 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,386 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2021-05-02 23:16:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 23:16:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,387 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:16:43,387 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 23:16:43,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 23:16:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2021-05-02 23:16:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-05-02 23:16:43,390 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-05-02 23:16:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,390 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-05-02 23:16:43,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-05-02 23:16:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:16:43,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,391 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:43,391 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 33 times [2021-05-02 23:16:43,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49198520] [2021-05-02 23:16:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,396 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,396 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:43,872 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49198520] [2021-05-02 23:16:43,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [49198520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:43,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008402186] [2021-05-02 23:16:43,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:43,874 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,193 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2021-05-02 23:16:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 23:16:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,194 INFO L225 Difference]: With dead ends: 271 [2021-05-02 23:16:44,194 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:16:44,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:16:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2021-05-02 23:16:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-05-02 23:16:44,202 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-05-02 23:16:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,202 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-05-02 23:16:44,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-05-02 23:16:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:16:44,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,203 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:44,203 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 34 times [2021-05-02 23:16:44,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235213834] [2021-05-02 23:16:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,207 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,207 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:44,725 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:44,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235213834] [2021-05-02 23:16:44,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235213834] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:44,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:44,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699070619] [2021-05-02 23:16:44,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:44,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:44,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:44,726 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,046 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2021-05-02 23:16:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 23:16:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,048 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:16:45,048 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 23:16:45,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 23:16:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2021-05-02 23:16:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-05-02 23:16:45,051 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2021-05-02 23:16:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,051 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-05-02 23:16:45,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-05-02 23:16:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:16:45,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,051 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:45,052 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 35 times [2021-05-02 23:16:45,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343260094] [2021-05-02 23:16:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,056 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,057 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:45,591 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343260094] [2021-05-02 23:16:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343260094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:45,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577669848] [2021-05-02 23:16:45,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:45,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:45,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:45,592 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,867 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2021-05-02 23:16:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-02 23:16:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,868 INFO L225 Difference]: With dead ends: 285 [2021-05-02 23:16:45,869 INFO L226 Difference]: Without dead ends: 268 [2021-05-02 23:16:45,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-02 23:16:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2021-05-02 23:16:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-05-02 23:16:45,872 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2021-05-02 23:16:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,873 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-05-02 23:16:45,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-05-02 23:16:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:16:45,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,873 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:45,873 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 36 times [2021-05-02 23:16:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153609083] [2021-05-02 23:16:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,878 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:46,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153609083] [2021-05-02 23:16:46,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [153609083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:46,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083409152] [2021-05-02 23:16:46,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:46,432 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:46,785 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2021-05-02 23:16:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:16:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:46,787 INFO L225 Difference]: With dead ends: 292 [2021-05-02 23:16:46,787 INFO L226 Difference]: Without dead ends: 275 [2021-05-02 23:16:46,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-02 23:16:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2021-05-02 23:16:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-05-02 23:16:46,790 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2021-05-02 23:16:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:46,790 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-05-02 23:16:46,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-05-02 23:16:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 23:16:46,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:46,791 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:46,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:46,791 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 37 times [2021-05-02 23:16:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:46,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894727389] [2021-05-02 23:16:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:46,796 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:46,796 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:47,375 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:47,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894727389] [2021-05-02 23:16:47,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1894727389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:47,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:47,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624033894] [2021-05-02 23:16:47,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:47,376 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,713 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2021-05-02 23:16:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-02 23:16:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,714 INFO L225 Difference]: With dead ends: 299 [2021-05-02 23:16:47,714 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 23:16:47,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 23:16:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2021-05-02 23:16:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-05-02 23:16:47,717 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2021-05-02 23:16:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,717 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-05-02 23:16:47,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-05-02 23:16:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:16:47,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,718 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:47,718 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 38 times [2021-05-02 23:16:47,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370677585] [2021-05-02 23:16:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,722 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,726 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:48,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370677585] [2021-05-02 23:16:48,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370677585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:48,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870393633] [2021-05-02 23:16:48,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:48,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:48,342 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,713 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2021-05-02 23:16:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:16:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,714 INFO L225 Difference]: With dead ends: 306 [2021-05-02 23:16:48,714 INFO L226 Difference]: Without dead ends: 289 [2021-05-02 23:16:48,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-02 23:16:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2021-05-02 23:16:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-05-02 23:16:48,718 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-05-02 23:16:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,718 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-05-02 23:16:48,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-05-02 23:16:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:16:48,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,718 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:48,719 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 39 times [2021-05-02 23:16:48,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455229919] [2021-05-02 23:16:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,723 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:49,365 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:49,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455229919] [2021-05-02 23:16:49,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1455229919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:49,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:49,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:49,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946052998] [2021-05-02 23:16:49,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:49,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:49,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:49,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:49,367 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:49,671 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2021-05-02 23:16:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:16:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:49,673 INFO L225 Difference]: With dead ends: 313 [2021-05-02 23:16:49,673 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 23:16:49,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 23:16:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2021-05-02 23:16:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-05-02 23:16:49,676 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-05-02 23:16:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:49,676 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-05-02 23:16:49,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-05-02 23:16:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 23:16:49,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:49,676 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:49,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:49,677 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 40 times [2021-05-02 23:16:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678377334] [2021-05-02 23:16:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:49,687 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:49,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:50,339 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678377334] [2021-05-02 23:16:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678377334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:50,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:50,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209501702] [2021-05-02 23:16:50,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:50,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:50,340 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,738 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2021-05-02 23:16:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 23:16:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,739 INFO L225 Difference]: With dead ends: 320 [2021-05-02 23:16:50,739 INFO L226 Difference]: Without dead ends: 303 [2021-05-02 23:16:50,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-02 23:16:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2021-05-02 23:16:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-05-02 23:16:50,742 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2021-05-02 23:16:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:50,742 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-05-02 23:16:50,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-05-02 23:16:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:16:50,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:50,743 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:50,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:50,743 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:50,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 41 times [2021-05-02 23:16:50,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:50,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747188512] [2021-05-02 23:16:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:50,751 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:50,751 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,457 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747188512] [2021-05-02 23:16:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747188512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:51,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498039527] [2021-05-02 23:16:51,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:51,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:51,458 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:51,834 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2021-05-02 23:16:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 23:16:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:51,835 INFO L225 Difference]: With dead ends: 327 [2021-05-02 23:16:51,835 INFO L226 Difference]: Without dead ends: 310 [2021-05-02 23:16:51,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-02 23:16:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2021-05-02 23:16:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-05-02 23:16:51,838 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2021-05-02 23:16:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,839 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-05-02 23:16:51,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-05-02 23:16:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 23:16:51,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,839 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:51,839 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 42 times [2021-05-02 23:16:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535090201] [2021-05-02 23:16:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,845 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,846 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:52,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:52,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535090201] [2021-05-02 23:16:52,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [535090201] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:52,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:52,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:52,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623314117] [2021-05-02 23:16:52,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:52,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:52,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:52,581 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:52,909 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2021-05-02 23:16:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 23:16:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:52,910 INFO L225 Difference]: With dead ends: 334 [2021-05-02 23:16:52,910 INFO L226 Difference]: Without dead ends: 317 [2021-05-02 23:16:52,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 672.3ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-02 23:16:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2021-05-02 23:16:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-05-02 23:16:52,913 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-05-02 23:16:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:52,914 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-05-02 23:16:52,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-05-02 23:16:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 23:16:52,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:52,914 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:52,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:52,914 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:52,915 INFO L82 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 43 times [2021-05-02 23:16:52,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:52,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904257242] [2021-05-02 23:16:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:52,919 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:52,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:53,715 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:53,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904257242] [2021-05-02 23:16:53,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [904257242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:53,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:53,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:53,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064283188] [2021-05-02 23:16:53,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:53,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:53,716 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:54,127 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2021-05-02 23:16:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:54,128 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 23:16:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:54,129 INFO L225 Difference]: With dead ends: 341 [2021-05-02 23:16:54,129 INFO L226 Difference]: Without dead ends: 324 [2021-05-02 23:16:54,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 752.3ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-02 23:16:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2021-05-02 23:16:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-05-02 23:16:54,132 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2021-05-02 23:16:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:54,132 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-05-02 23:16:54,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-05-02 23:16:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 23:16:54,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:54,133 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:54,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:54,133 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 44 times [2021-05-02 23:16:54,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:54,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181407522] [2021-05-02 23:16:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:54,137 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:54,138 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:54,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181407522] [2021-05-02 23:16:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181407522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:54,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:54,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705917678] [2021-05-02 23:16:54,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:54,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:54,919 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:55,365 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2021-05-02 23:16:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-05-02 23:16:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:55,367 INFO L225 Difference]: With dead ends: 348 [2021-05-02 23:16:55,367 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 23:16:55,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 23:16:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2021-05-02 23:16:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2021-05-02 23:16:55,370 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2021-05-02 23:16:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2021-05-02 23:16:55,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2021-05-02 23:16:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 23:16:55,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:55,370 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:55,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:55,370 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 45 times [2021-05-02 23:16:55,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:55,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508536569] [2021-05-02 23:16:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:55,385 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:55,386 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:56,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508536569] [2021-05-02 23:16:56,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [508536569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:56,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400440784] [2021-05-02 23:16:56,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:56,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:56,221 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,596 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2021-05-02 23:16:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2021-05-02 23:16:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,598 INFO L225 Difference]: With dead ends: 355 [2021-05-02 23:16:56,598 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 23:16:56,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 23:16:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2021-05-02 23:16:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-05-02 23:16:56,601 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2021-05-02 23:16:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:56,601 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-05-02 23:16:56,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-05-02 23:16:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 23:16:56,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:56,602 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:56,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:56,602 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 46 times [2021-05-02 23:16:56,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:56,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182397729] [2021-05-02 23:16:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:56,611 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:56,611 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:57,525 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182397729] [2021-05-02 23:16:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [182397729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502256848] [2021-05-02 23:16:57,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:57,526 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:57,997 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2021-05-02 23:16:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:57,997 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 23:16:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:57,998 INFO L225 Difference]: With dead ends: 362 [2021-05-02 23:16:57,999 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 23:16:57,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 23:16:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2021-05-02 23:16:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-05-02 23:16:58,002 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2021-05-02 23:16:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:58,002 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-05-02 23:16:58,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-05-02 23:16:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:16:58,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:58,002 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:58,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:58,003 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 47 times [2021-05-02 23:16:58,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:58,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995176043] [2021-05-02 23:16:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:58,006 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:58,007 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:58,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:58,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995176043] [2021-05-02 23:16:58,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995176043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:58,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:58,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980047724] [2021-05-02 23:16:58,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:58,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:58,918 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:59,369 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2021-05-02 23:16:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2021-05-02 23:16:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:59,370 INFO L225 Difference]: With dead ends: 369 [2021-05-02 23:16:59,370 INFO L226 Difference]: Without dead ends: 352 [2021-05-02 23:16:59,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 854.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-02 23:16:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2021-05-02 23:16:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-05-02 23:16:59,373 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2021-05-02 23:16:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,373 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-05-02 23:16:59,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-05-02 23:16:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 23:16:59,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,374 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:59,374 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 48 times [2021-05-02 23:16:59,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893603572] [2021-05-02 23:16:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,387 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,387 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:00,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:00,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893603572] [2021-05-02 23:17:00,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893603572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:00,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:00,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:17:00,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535249607] [2021-05-02 23:17:00,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:17:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:17:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:17:00,334 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,827 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2021-05-02 23:17:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:17:00,828 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-05-02 23:17:00,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:00,829 INFO L225 Difference]: With dead ends: 376 [2021-05-02 23:17:00,829 INFO L226 Difference]: Without dead ends: 359 [2021-05-02 23:17:00,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:17:00,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-02 23:17:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2021-05-02 23:17:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-05-02 23:17:00,832 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2021-05-02 23:17:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:00,832 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-05-02 23:17:00,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-05-02 23:17:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 23:17:00,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:00,833 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:00,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:17:00,833 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 49 times [2021-05-02 23:17:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:00,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265163092] [2021-05-02 23:17:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:00,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:00,844 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:01,820 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265163092] [2021-05-02 23:17:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [265163092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:01,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:01,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:17:01,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048495269] [2021-05-02 23:17:01,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:17:01,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:17:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:17:01,821 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:02,252 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2021-05-02 23:17:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:17:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-05-02 23:17:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:02,254 INFO L225 Difference]: With dead ends: 383 [2021-05-02 23:17:02,254 INFO L226 Difference]: Without dead ends: 366 [2021-05-02 23:17:02,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:17:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-02 23:17:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2021-05-02 23:17:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-05-02 23:17:02,257 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-05-02 23:17:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:02,257 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-05-02 23:17:02,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-05-02 23:17:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:17:02,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:02,258 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:02,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:17:02,258 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 50 times [2021-05-02 23:17:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:02,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663973808] [2021-05-02 23:17:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:02,262 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:02,263 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:03,266 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:03,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663973808] [2021-05-02 23:17:03,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [663973808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:03,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:03,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:17:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665415401] [2021-05-02 23:17:03,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:17:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:17:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:17:03,268 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:03,837 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2021-05-02 23:17:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:17:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-05-02 23:17:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:03,838 INFO L225 Difference]: With dead ends: 390 [2021-05-02 23:17:03,838 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 23:17:03,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:17:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 23:17:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2021-05-02 23:17:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-05-02 23:17:03,841 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-05-02 23:17:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:03,841 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-05-02 23:17:03,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-05-02 23:17:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 23:17:03,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:03,842 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:03,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:17:03,842 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 51 times [2021-05-02 23:17:03,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:03,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972337910] [2021-05-02 23:17:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:03,846 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:03,846 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:04,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:04,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972337910] [2021-05-02 23:17:04,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972337910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:04,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:04,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:17:04,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895775066] [2021-05-02 23:17:04,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:17:04,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:17:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:17:04,848 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:05,398 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2021-05-02 23:17:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:17:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2021-05-02 23:17:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:05,400 INFO L225 Difference]: With dead ends: 397 [2021-05-02 23:17:05,400 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 23:17:05,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 950.3ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:17:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 23:17:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2021-05-02 23:17:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-05-02 23:17:05,403 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2021-05-02 23:17:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:05,403 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-05-02 23:17:05,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-05-02 23:17:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 23:17:05,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,404 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:17:05,404 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 52 times [2021-05-02 23:17:05,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000708967] [2021-05-02 23:17:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,420 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:05,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,508 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000708967] [2021-05-02 23:17:06,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000708967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:17:06,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492240593] [2021-05-02 23:17:06,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:17:06,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:17:06,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:17:06,509 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:07,039 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2021-05-02 23:17:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:17:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-05-02 23:17:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:07,041 INFO L225 Difference]: With dead ends: 404 [2021-05-02 23:17:07,041 INFO L226 Difference]: Without dead ends: 387 [2021-05-02 23:17:07,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1035.6ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:17:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-02 23:17:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2021-05-02 23:17:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-05-02 23:17:07,044 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-05-02 23:17:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:07,044 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-05-02 23:17:07,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-05-02 23:17:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 23:17:07,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:07,045 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:07,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:17:07,045 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 53 times [2021-05-02 23:17:07,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:07,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414712898] [2021-05-02 23:17:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:07,055 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:07,055 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:08,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414712898] [2021-05-02 23:17:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414712898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:17:08,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468041124] [2021-05-02 23:17:08,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:17:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:17:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:17:08,199 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:08,799 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2021-05-02 23:17:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:17:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 23:17:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:08,801 INFO L225 Difference]: With dead ends: 411 [2021-05-02 23:17:08,801 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 23:17:08,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1092.3ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:17:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 23:17:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2021-05-02 23:17:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-05-02 23:17:08,804 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2021-05-02 23:17:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,804 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-05-02 23:17:08,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-05-02 23:17:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 23:17:08,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,805 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:17:08,805 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 54 times [2021-05-02 23:17:08,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520036232] [2021-05-02 23:17:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,819 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:08,819 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:10,028 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520036232] [2021-05-02 23:17:10,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [520036232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:17:10,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863365822] [2021-05-02 23:17:10,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:17:10,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:17:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:17:10,029 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:10,603 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2021-05-02 23:17:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:17:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 23:17:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:10,604 INFO L225 Difference]: With dead ends: 418 [2021-05-02 23:17:10,604 INFO L226 Difference]: Without dead ends: 401 [2021-05-02 23:17:10,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1158.2ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:17:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-02 23:17:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2021-05-02 23:17:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-05-02 23:17:10,607 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2021-05-02 23:17:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:10,608 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-05-02 23:17:10,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-05-02 23:17:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 23:17:10,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:10,608 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:10,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:17:10,608 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:10,609 INFO L82 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 55 times [2021-05-02 23:17:10,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:10,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609539526] [2021-05-02 23:17:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:10,615 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:10,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:11,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609539526] [2021-05-02 23:17:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [609539526] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:11,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:11,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:17:11,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332729306] [2021-05-02 23:17:11,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:17:11,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:17:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:11,788 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:12,447 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2021-05-02 23:17:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:17:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 23:17:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:12,449 INFO L225 Difference]: With dead ends: 425 [2021-05-02 23:17:12,449 INFO L226 Difference]: Without dead ends: 408 [2021-05-02 23:17:12,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1120.7ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-02 23:17:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2021-05-02 23:17:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-05-02 23:17:12,452 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2021-05-02 23:17:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:12,452 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-05-02 23:17:12,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-05-02 23:17:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 23:17:12,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:12,453 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:12,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:17:12,453 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:12,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 56 times [2021-05-02 23:17:12,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:12,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330119311] [2021-05-02 23:17:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:12,459 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:12,459 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:13,747 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:13,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330119311] [2021-05-02 23:17:13,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330119311] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:13,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:13,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:17:13,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235416343] [2021-05-02 23:17:13,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:17:13,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:17:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:13,749 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:14,349 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2021-05-02 23:17:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:17:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 23:17:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:14,352 INFO L225 Difference]: With dead ends: 432 [2021-05-02 23:17:14,352 INFO L226 Difference]: Without dead ends: 415 [2021-05-02 23:17:14,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1225.3ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-02 23:17:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2021-05-02 23:17:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-05-02 23:17:14,355 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-05-02 23:17:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:14,355 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-05-02 23:17:14,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-05-02 23:17:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 23:17:14,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:14,356 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:14,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:17:14,356 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:14,356 INFO L82 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 57 times [2021-05-02 23:17:14,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:14,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187956126] [2021-05-02 23:17:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:14,367 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:14,367 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:15,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187956126] [2021-05-02 23:17:15,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [187956126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:17:15,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160824986] [2021-05-02 23:17:15,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:17:15,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:17:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:15,622 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:16,148 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2021-05-02 23:17:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:17:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 23:17:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:16,150 INFO L225 Difference]: With dead ends: 439 [2021-05-02 23:17:16,150 INFO L226 Difference]: Without dead ends: 422 [2021-05-02 23:17:16,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1202.8ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-02 23:17:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2021-05-02 23:17:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2021-05-02 23:17:16,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2021-05-02 23:17:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:16,153 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2021-05-02 23:17:16,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2021-05-02 23:17:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 23:17:16,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:16,154 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:16,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:17:16,154 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 58 times [2021-05-02 23:17:16,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:16,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544362434] [2021-05-02 23:17:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:16,160 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:16,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:17,477 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544362434] [2021-05-02 23:17:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [544362434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:17:17,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340151863] [2021-05-02 23:17:17,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:17:17,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:17:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:17,478 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:18,122 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2021-05-02 23:17:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:17:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 23:17:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:18,124 INFO L225 Difference]: With dead ends: 446 [2021-05-02 23:17:18,124 INFO L226 Difference]: Without dead ends: 429 [2021-05-02 23:17:18,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1255.9ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-02 23:17:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2021-05-02 23:17:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2021-05-02 23:17:18,127 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2021-05-02 23:17:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:18,127 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2021-05-02 23:17:18,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2021-05-02 23:17:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 23:17:18,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:18,128 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:18,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:17:18,128 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 59 times [2021-05-02 23:17:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:18,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078803486] [2021-05-02 23:17:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:18,143 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:18,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:19,527 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:19,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078803486] [2021-05-02 23:17:19,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078803486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:19,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:19,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:17:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286157308] [2021-05-02 23:17:19,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:17:19,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:17:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:19,528 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:20,220 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2021-05-02 23:17:20,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:17:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-05-02 23:17:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:20,222 INFO L225 Difference]: With dead ends: 453 [2021-05-02 23:17:20,222 INFO L226 Difference]: Without dead ends: 436 [2021-05-02 23:17:20,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1330.6ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-02 23:17:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2021-05-02 23:17:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-05-02 23:17:20,225 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2021-05-02 23:17:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:20,225 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-05-02 23:17:20,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-05-02 23:17:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:17:20,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:20,226 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:20,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:20,226 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 60 times [2021-05-02 23:17:20,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:20,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993088880] [2021-05-02 23:17:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:20,231 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:20,231 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:21,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:21,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:21,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993088880] [2021-05-02 23:17:21,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [993088880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:21,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:21,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:21,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771803858] [2021-05-02 23:17:21,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:21,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:21,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:21,611 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,199 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2021-05-02 23:17:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:17:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,200 INFO L225 Difference]: With dead ends: 460 [2021-05-02 23:17:22,201 INFO L226 Difference]: Without dead ends: 443 [2021-05-02 23:17:22,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1321.7ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-05-02 23:17:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2021-05-02 23:17:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-05-02 23:17:22,204 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2021-05-02 23:17:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,204 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-05-02 23:17:22,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-05-02 23:17:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:17:22,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,205 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:22,205 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 61 times [2021-05-02 23:17:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489902085] [2021-05-02 23:17:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,213 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:22,214 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:23,641 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489902085] [2021-05-02 23:17:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489902085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:23,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:23,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:23,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131432579] [2021-05-02 23:17:23,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:23,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:23,643 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:24,261 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2021-05-02 23:17:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:17:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:24,263 INFO L225 Difference]: With dead ends: 467 [2021-05-02 23:17:24,263 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 23:17:24,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1375.2ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 23:17:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2021-05-02 23:17:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-05-02 23:17:24,267 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2021-05-02 23:17:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:24,267 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-05-02 23:17:24,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-05-02 23:17:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:17:24,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:24,267 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:24,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:24,268 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 62 times [2021-05-02 23:17:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:24,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681271285] [2021-05-02 23:17:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:24,290 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:24,291 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:25,789 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:25,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681271285] [2021-05-02 23:17:25,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [681271285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:25,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:25,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19760415] [2021-05-02 23:17:25,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:25,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:25,790 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:26,513 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2021-05-02 23:17:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:17:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:26,515 INFO L225 Difference]: With dead ends: 474 [2021-05-02 23:17:26,515 INFO L226 Difference]: Without dead ends: 457 [2021-05-02 23:17:26,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1440.9ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-02 23:17:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2021-05-02 23:17:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-05-02 23:17:26,518 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2021-05-02 23:17:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:26,518 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-05-02 23:17:26,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-05-02 23:17:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:17:26,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:26,519 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:26,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:26,519 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 63 times [2021-05-02 23:17:26,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:26,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715655672] [2021-05-02 23:17:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:26,531 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:26,532 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:28,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:28,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715655672] [2021-05-02 23:17:28,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [715655672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:28,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:28,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:28,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102271019] [2021-05-02 23:17:28,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:28,051 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:28,840 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2021-05-02 23:17:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 23:17:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:28,842 INFO L225 Difference]: With dead ends: 481 [2021-05-02 23:17:28,842 INFO L226 Difference]: Without dead ends: 464 [2021-05-02 23:17:28,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1465.6ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-02 23:17:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2021-05-02 23:17:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-05-02 23:17:28,845 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-05-02 23:17:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:28,845 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-05-02 23:17:28,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-05-02 23:17:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:17:28,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:28,846 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:28,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:28,846 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 64 times [2021-05-02 23:17:28,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:28,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16329626] [2021-05-02 23:17:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:28,863 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:28,863 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:30,434 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:30,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16329626] [2021-05-02 23:17:30,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [16329626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:30,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:30,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219076618] [2021-05-02 23:17:30,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:30,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:30,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:30,436 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:31,102 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2021-05-02 23:17:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 23:17:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:31,104 INFO L225 Difference]: With dead ends: 488 [2021-05-02 23:17:31,104 INFO L226 Difference]: Without dead ends: 471 [2021-05-02 23:17:31,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1516.1ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-02 23:17:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2021-05-02 23:17:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-05-02 23:17:31,107 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-05-02 23:17:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:31,108 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-05-02 23:17:31,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-05-02 23:17:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:17:31,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:31,108 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:31,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:31,108 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 65 times [2021-05-02 23:17:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:31,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950609254] [2021-05-02 23:17:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:31,118 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:31,119 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:32,737 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:32,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950609254] [2021-05-02 23:17:32,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950609254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:32,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:32,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:32,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529320540] [2021-05-02 23:17:32,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:32,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:32,738 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:33,584 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2021-05-02 23:17:33,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:33,584 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 23:17:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:33,585 INFO L225 Difference]: With dead ends: 495 [2021-05-02 23:17:33,585 INFO L226 Difference]: Without dead ends: 478 [2021-05-02 23:17:33,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1558.9ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-02 23:17:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2021-05-02 23:17:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-05-02 23:17:33,589 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2021-05-02 23:17:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:33,589 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-05-02 23:17:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-05-02 23:17:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:17:33,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:33,590 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:33,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:33,590 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 66 times [2021-05-02 23:17:33,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:33,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077980370] [2021-05-02 23:17:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:33,603 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:33,603 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:35,300 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:35,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077980370] [2021-05-02 23:17:35,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077980370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:35,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:35,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:35,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301652954] [2021-05-02 23:17:35,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:35,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:35,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:35,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:35,302 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:36,231 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2021-05-02 23:17:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:17:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:36,233 INFO L225 Difference]: With dead ends: 502 [2021-05-02 23:17:36,233 INFO L226 Difference]: Without dead ends: 485 [2021-05-02 23:17:36,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1640.1ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:36,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-05-02 23:17:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2021-05-02 23:17:36,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-05-02 23:17:36,236 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2021-05-02 23:17:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:36,237 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-05-02 23:17:36,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-05-02 23:17:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:17:36,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:36,237 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:36,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:36,237 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 67 times [2021-05-02 23:17:36,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:36,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817367223] [2021-05-02 23:17:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:36,243 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:36,244 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:38,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:38,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817367223] [2021-05-02 23:17:38,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [817367223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:38,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:38,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:38,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964061015] [2021-05-02 23:17:38,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:38,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:38,007 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:38,789 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2021-05-02 23:17:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 23:17:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:38,791 INFO L225 Difference]: With dead ends: 509 [2021-05-02 23:17:38,791 INFO L226 Difference]: Without dead ends: 492 [2021-05-02 23:17:38,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1678.1ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:38,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-05-02 23:17:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2021-05-02 23:17:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2021-05-02 23:17:38,794 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2021-05-02 23:17:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,794 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2021-05-02 23:17:38,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2021-05-02 23:17:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:17:38,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,795 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:38,795 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,795 INFO L82 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 68 times [2021-05-02 23:17:38,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440493208] [2021-05-02 23:17:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,800 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,801 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:40,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440493208] [2021-05-02 23:17:40,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [440493208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:40,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559657347] [2021-05-02 23:17:40,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:40,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:40,573 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:41,437 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2021-05-02 23:17:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 23:17:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:41,438 INFO L225 Difference]: With dead ends: 516 [2021-05-02 23:17:41,438 INFO L226 Difference]: Without dead ends: 499 [2021-05-02 23:17:41,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1707.4ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-05-02 23:17:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2021-05-02 23:17:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-05-02 23:17:41,442 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2021-05-02 23:17:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,442 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-05-02 23:17:41,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-05-02 23:17:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:17:41,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,443 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:41,443 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 69 times [2021-05-02 23:17:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622418527] [2021-05-02 23:17:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,447 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:41,447 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:43,300 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:43,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622418527] [2021-05-02 23:17:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1622418527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:43,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:43,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257908133] [2021-05-02 23:17:43,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:43,301 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:44,385 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2021-05-02 23:17:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:44,385 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 23:17:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:44,386 INFO L225 Difference]: With dead ends: 523 [2021-05-02 23:17:44,387 INFO L226 Difference]: Without dead ends: 506 [2021-05-02 23:17:44,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1763.9ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-05-02 23:17:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2021-05-02 23:17:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-05-02 23:17:44,400 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2021-05-02 23:17:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:44,401 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-05-02 23:17:44,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-05-02 23:17:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:17:44,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:44,401 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:44,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:44,402 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 70 times [2021-05-02 23:17:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:44,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158373957] [2021-05-02 23:17:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:44,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:44,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:46,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:46,299 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:46,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158373957] [2021-05-02 23:17:46,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [158373957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:46,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:46,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:46,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105567514] [2021-05-02 23:17:46,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:46,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:46,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:46,300 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:47,327 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2021-05-02 23:17:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 23:17:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:47,329 INFO L225 Difference]: With dead ends: 530 [2021-05-02 23:17:47,329 INFO L226 Difference]: Without dead ends: 513 [2021-05-02 23:17:47,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1828.8ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-02 23:17:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2021-05-02 23:17:47,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2021-05-02 23:17:47,332 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2021-05-02 23:17:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:47,332 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2021-05-02 23:17:47,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2021-05-02 23:17:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:17:47,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:47,333 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:47,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:47,333 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 71 times [2021-05-02 23:17:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:47,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507276168] [2021-05-02 23:17:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:47,345 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:47,345 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:49,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507276168] [2021-05-02 23:17:49,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507276168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:49,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:49,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:49,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761972896] [2021-05-02 23:17:49,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:49,262 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:50,193 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2021-05-02 23:17:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:17:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:50,195 INFO L225 Difference]: With dead ends: 537 [2021-05-02 23:17:50,195 INFO L226 Difference]: Without dead ends: 520 [2021-05-02 23:17:50,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1855.4ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-02 23:17:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2021-05-02 23:17:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2021-05-02 23:17:50,198 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2021-05-02 23:17:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:50,198 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2021-05-02 23:17:50,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2021-05-02 23:17:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:17:50,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:50,199 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:50,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:50,199 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 72 times [2021-05-02 23:17:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:50,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383426175] [2021-05-02 23:17:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:50,202 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:50,203 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:52,174 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:52,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383426175] [2021-05-02 23:17:52,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [383426175] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:52,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:52,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909576902] [2021-05-02 23:17:52,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:52,175 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:53,205 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2021-05-02 23:17:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 23:17:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:53,207 INFO L225 Difference]: With dead ends: 544 [2021-05-02 23:17:53,207 INFO L226 Difference]: Without dead ends: 527 [2021-05-02 23:17:53,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1912.3ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-05-02 23:17:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2021-05-02 23:17:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-05-02 23:17:53,210 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2021-05-02 23:17:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:53,210 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-05-02 23:17:53,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-05-02 23:17:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:17:53,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:53,211 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:53,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:53,211 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 73 times [2021-05-02 23:17:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:53,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619143457] [2021-05-02 23:17:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:53,220 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:53,221 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:55,273 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:55,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619143457] [2021-05-02 23:17:55,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [619143457] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:55,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:55,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092386114] [2021-05-02 23:17:55,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:55,274 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:56,431 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2021-05-02 23:17:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 23:17:56,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:56,433 INFO L225 Difference]: With dead ends: 551 [2021-05-02 23:17:56,433 INFO L226 Difference]: Without dead ends: 534 [2021-05-02 23:17:56,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1983.2ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-02 23:17:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2021-05-02 23:17:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2021-05-02 23:17:56,437 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2021-05-02 23:17:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:56,437 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2021-05-02 23:17:56,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2021-05-02 23:17:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:17:56,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:56,438 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:56,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:56,438 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:56,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 74 times [2021-05-02 23:17:56,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:56,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797661802] [2021-05-02 23:17:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:56,443 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:56,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:58,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:58,536 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:58,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797661802] [2021-05-02 23:17:58,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [797661802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:58,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:58,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:58,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875176051] [2021-05-02 23:17:58,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:58,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:58,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:58,537 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:59,777 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2021-05-02 23:17:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 23:17:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:59,779 INFO L225 Difference]: With dead ends: 558 [2021-05-02 23:17:59,779 INFO L226 Difference]: Without dead ends: 541 [2021-05-02 23:17:59,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2027.6ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-05-02 23:17:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2021-05-02 23:17:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-05-02 23:17:59,782 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2021-05-02 23:17:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:59,782 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-05-02 23:17:59,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-05-02 23:17:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:17:59,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:59,783 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:59,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:59,783 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 75 times [2021-05-02 23:17:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726370073] [2021-05-02 23:17:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:59,795 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:59,795 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:01,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:01,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726370073] [2021-05-02 23:18:01,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726370073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:01,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:01,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:18:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126214409] [2021-05-02 23:18:01,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:18:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:18:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:18:01,993 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:03,229 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2021-05-02 23:18:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:18:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 23:18:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:03,231 INFO L225 Difference]: With dead ends: 565 [2021-05-02 23:18:03,231 INFO L226 Difference]: Without dead ends: 548 [2021-05-02 23:18:03,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2131.2ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:18:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-05-02 23:18:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2021-05-02 23:18:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-05-02 23:18:03,251 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2021-05-02 23:18:03,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:03,251 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-05-02 23:18:03,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-05-02 23:18:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:18:03,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:03,252 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:03,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:18:03,252 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 76 times [2021-05-02 23:18:03,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:03,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135074027] [2021-05-02 23:18:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:03,259 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:03,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:05,490 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135074027] [2021-05-02 23:18:05,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2135074027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:05,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:05,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:18:05,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42317501] [2021-05-02 23:18:05,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:18:05,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:18:05,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:18:05,491 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:06,624 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2021-05-02 23:18:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:18:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:18:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:06,626 INFO L225 Difference]: With dead ends: 572 [2021-05-02 23:18:06,626 INFO L226 Difference]: Without dead ends: 555 [2021-05-02 23:18:06,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2149.4ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:18:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-02 23:18:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2021-05-02 23:18:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-05-02 23:18:06,629 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2021-05-02 23:18:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:06,629 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-05-02 23:18:06,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-05-02 23:18:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:18:06,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:06,630 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:06,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:18:06,630 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:06,631 INFO L82 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 77 times [2021-05-02 23:18:06,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:06,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433732075] [2021-05-02 23:18:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:06,639 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:06,640 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:08,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:08,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:08,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433732075] [2021-05-02 23:18:08,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [433732075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:08,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:08,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:18:08,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663089611] [2021-05-02 23:18:08,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:18:08,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:18:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:08,920 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:09,973 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2021-05-02 23:18:09,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:18:09,974 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2021-05-02 23:18:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:09,975 INFO L225 Difference]: With dead ends: 579 [2021-05-02 23:18:09,975 INFO L226 Difference]: Without dead ends: 562 [2021-05-02 23:18:09,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2212.3ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-02 23:18:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2021-05-02 23:18:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-05-02 23:18:09,979 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2021-05-02 23:18:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:09,979 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-05-02 23:18:09,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-05-02 23:18:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:18:09,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:09,980 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:09,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:18:09,980 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 78 times [2021-05-02 23:18:09,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:09,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381864915] [2021-05-02 23:18:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:09,983 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:09,984 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:12,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:12,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381864915] [2021-05-02 23:18:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381864915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:12,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:12,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:18:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222627299] [2021-05-02 23:18:12,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:18:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:18:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:12,322 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:13,669 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2021-05-02 23:18:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:18:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2021-05-02 23:18:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:13,671 INFO L225 Difference]: With dead ends: 586 [2021-05-02 23:18:13,671 INFO L226 Difference]: Without dead ends: 569 [2021-05-02 23:18:13,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2271.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-02 23:18:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2021-05-02 23:18:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-05-02 23:18:13,675 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2021-05-02 23:18:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:13,675 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-05-02 23:18:13,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-05-02 23:18:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 23:18:13,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:13,676 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:13,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:18:13,676 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 79 times [2021-05-02 23:18:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:13,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381746288] [2021-05-02 23:18:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:13,680 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:13,680 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:16,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:16,088 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:16,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381746288] [2021-05-02 23:18:16,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [381746288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:16,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:16,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:18:16,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256242597] [2021-05-02 23:18:16,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:18:16,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:18:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:16,089 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:17,542 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2021-05-02 23:18:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:18:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-05-02 23:18:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:17,544 INFO L225 Difference]: With dead ends: 593 [2021-05-02 23:18:17,544 INFO L226 Difference]: Without dead ends: 576 [2021-05-02 23:18:17,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2337.0ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-05-02 23:18:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2021-05-02 23:18:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-05-02 23:18:17,548 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2021-05-02 23:18:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:17,548 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-05-02 23:18:17,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-05-02 23:18:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:18:17,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:17,549 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:17,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:18:17,549 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 80 times [2021-05-02 23:18:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679854426] [2021-05-02 23:18:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:17,559 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:17,559 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:20,043 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679854426] [2021-05-02 23:18:20,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [679854426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:20,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:20,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:18:20,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370459909] [2021-05-02 23:18:20,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:18:20,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:18:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:20,045 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:21,261 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2021-05-02 23:18:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:18:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-05-02 23:18:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:21,263 INFO L225 Difference]: With dead ends: 600 [2021-05-02 23:18:21,263 INFO L226 Difference]: Without dead ends: 583 [2021-05-02 23:18:21,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2410.8ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-02 23:18:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2021-05-02 23:18:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-05-02 23:18:21,267 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2021-05-02 23:18:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:21,267 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-05-02 23:18:21,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-05-02 23:18:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:18:21,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:21,268 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:21,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:18:21,268 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 81 times [2021-05-02 23:18:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49506294] [2021-05-02 23:18:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:21,279 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:21,280 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:23,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:23,870 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:23,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49506294] [2021-05-02 23:18:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [49506294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:23,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:23,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:18:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242518019] [2021-05-02 23:18:23,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:18:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:23,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:18:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:23,872 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:25,075 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2021-05-02 23:18:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:18:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-05-02 23:18:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:25,077 INFO L225 Difference]: With dead ends: 607 [2021-05-02 23:18:25,077 INFO L226 Difference]: Without dead ends: 590 [2021-05-02 23:18:25,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2520.2ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-02 23:18:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2021-05-02 23:18:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2021-05-02 23:18:25,081 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2021-05-02 23:18:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:25,081 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2021-05-02 23:18:25,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2021-05-02 23:18:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 23:18:25,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:25,082 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:25,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:18:25,082 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 82 times [2021-05-02 23:18:25,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:25,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051890217] [2021-05-02 23:18:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:25,091 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:25,092 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:27,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:27,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:27,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051890217] [2021-05-02 23:18:27,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051890217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:27,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:27,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:18:27,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188198622] [2021-05-02 23:18:27,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:18:27,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:18:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:27,786 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:29,309 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2021-05-02 23:18:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:18:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-05-02 23:18:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:29,312 INFO L225 Difference]: With dead ends: 614 [2021-05-02 23:18:29,312 INFO L226 Difference]: Without dead ends: 597 [2021-05-02 23:18:29,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2618.1ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-02 23:18:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2021-05-02 23:18:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-05-02 23:18:29,316 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2021-05-02 23:18:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:29,316 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-05-02 23:18:29,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-05-02 23:18:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 23:18:29,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:29,317 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:29,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:29,317 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 83 times [2021-05-02 23:18:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:29,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150100434] [2021-05-02 23:18:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:29,324 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:29,324 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:32,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:32,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150100434] [2021-05-02 23:18:32,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [150100434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:32,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:32,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:18:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068873105] [2021-05-02 23:18:32,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:18:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:18:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:32,080 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:33,758 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2021-05-02 23:18:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:18:33,758 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 23:18:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:33,760 INFO L225 Difference]: With dead ends: 621 [2021-05-02 23:18:33,760 INFO L226 Difference]: Without dead ends: 604 [2021-05-02 23:18:33,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2677.5ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-05-02 23:18:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2021-05-02 23:18:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-05-02 23:18:33,771 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2021-05-02 23:18:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:33,771 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-05-02 23:18:33,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-05-02 23:18:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 23:18:33,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:33,772 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:33,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:33,772 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:33,773 INFO L82 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 84 times [2021-05-02 23:18:33,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:33,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381549741] [2021-05-02 23:18:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:33,779 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:33,779 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:36,601 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381549741] [2021-05-02 23:18:36,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381549741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:36,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:36,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:36,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091424378] [2021-05-02 23:18:36,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:36,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:36,603 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:37,960 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2021-05-02 23:18:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 23:18:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:37,962 INFO L225 Difference]: With dead ends: 628 [2021-05-02 23:18:37,962 INFO L226 Difference]: Without dead ends: 611 [2021-05-02 23:18:37,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2748.9ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-05-02 23:18:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2021-05-02 23:18:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-05-02 23:18:37,966 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2021-05-02 23:18:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:37,967 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-05-02 23:18:37,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-05-02 23:18:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 23:18:37,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:37,968 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:37,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:37,968 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 85 times [2021-05-02 23:18:37,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:37,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916044207] [2021-05-02 23:18:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:37,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:37,980 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:40,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916044207] [2021-05-02 23:18:40,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [916044207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:40,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:40,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:40,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600327056] [2021-05-02 23:18:40,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:40,902 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:42,761 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2021-05-02 23:18:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 23:18:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:42,763 INFO L225 Difference]: With dead ends: 635 [2021-05-02 23:18:42,763 INFO L226 Difference]: Without dead ends: 618 [2021-05-02 23:18:42,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2839.7ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-05-02 23:18:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2021-05-02 23:18:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2021-05-02 23:18:42,768 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2021-05-02 23:18:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:42,768 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2021-05-02 23:18:42,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2021-05-02 23:18:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 23:18:42,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:42,769 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:42,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:42,769 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:42,769 INFO L82 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 86 times [2021-05-02 23:18:42,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:42,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801985031] [2021-05-02 23:18:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:42,783 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:42,784 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:45,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:45,854 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:45,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801985031] [2021-05-02 23:18:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [801985031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:45,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:45,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142601250] [2021-05-02 23:18:45,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:45,855 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:47,360 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2021-05-02 23:18:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 23:18:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:47,364 INFO L225 Difference]: With dead ends: 642 [2021-05-02 23:18:47,364 INFO L226 Difference]: Without dead ends: 625 [2021-05-02 23:18:47,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2986.5ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-02 23:18:47,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2021-05-02 23:18:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2021-05-02 23:18:47,368 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2021-05-02 23:18:47,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:47,369 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2021-05-02 23:18:47,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2021-05-02 23:18:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:18:47,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:47,369 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:47,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:47,370 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 87 times [2021-05-02 23:18:47,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:47,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487033288] [2021-05-02 23:18:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:47,378 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:47,379 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:50,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:50,374 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487033288] [2021-05-02 23:18:50,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487033288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:50,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:50,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:50,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942352309] [2021-05-02 23:18:50,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:50,376 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:51,715 INFO L93 Difference]: Finished difference Result 649 states and 829 transitions. [2021-05-02 23:18:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-05-02 23:18:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:51,716 INFO L225 Difference]: With dead ends: 649 [2021-05-02 23:18:51,716 INFO L226 Difference]: Without dead ends: 632 [2021-05-02 23:18:51,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2917.7ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-02 23:18:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 200. [2021-05-02 23:18:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 195 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-05-02 23:18:51,721 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2021-05-02 23:18:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:51,721 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-05-02 23:18:51,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-05-02 23:18:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 23:18:51,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:51,722 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:51,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:51,722 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 88 times [2021-05-02 23:18:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:51,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647948054] [2021-05-02 23:18:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:51,725 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:51,726 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:54,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:54,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647948054] [2021-05-02 23:18:54,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [647948054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:54,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:54,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:54,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214369987] [2021-05-02 23:18:54,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:54,830 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:56,248 INFO L93 Difference]: Finished difference Result 656 states and 838 transitions. [2021-05-02 23:18:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:56,249 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2021-05-02 23:18:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:56,250 INFO L225 Difference]: With dead ends: 656 [2021-05-02 23:18:56,250 INFO L226 Difference]: Without dead ends: 639 [2021-05-02 23:18:56,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3024.8ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-05-02 23:18:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 202. [2021-05-02 23:18:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2021-05-02 23:18:56,254 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2021-05-02 23:18:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:56,254 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2021-05-02 23:18:56,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2021-05-02 23:18:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-05-02 23:18:56,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:56,255 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:56,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:56,255 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 89 times [2021-05-02 23:18:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:56,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968324192] [2021-05-02 23:18:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:56,261 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:56,262 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:59,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:59,573 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968324192] [2021-05-02 23:18:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [968324192] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:59,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:59,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:59,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668234210] [2021-05-02 23:18:59,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:59,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:59,575 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:01,093 INFO L93 Difference]: Finished difference Result 663 states and 847 transitions. [2021-05-02 23:19:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:19:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2021-05-02 23:19:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:01,094 INFO L225 Difference]: With dead ends: 663 [2021-05-02 23:19:01,094 INFO L226 Difference]: Without dead ends: 646 [2021-05-02 23:19:01,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3227.6ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:19:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-05-02 23:19:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 204. [2021-05-02 23:19:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-05-02 23:19:01,098 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2021-05-02 23:19:01,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:01,099 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-05-02 23:19:01,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-05-02 23:19:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 23:19:01,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:01,099 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:01,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:19:01,100 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:01,100 INFO L82 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 90 times [2021-05-02 23:19:01,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:01,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209238336] [2021-05-02 23:19:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:01,104 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:01,104 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:04,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:04,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:04,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209238336] [2021-05-02 23:19:04,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [209238336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:04,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:04,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:19:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610628499] [2021-05-02 23:19:04,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:19:04,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:04,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:19:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:19:04,528 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:06,836 INFO L93 Difference]: Finished difference Result 670 states and 856 transitions. [2021-05-02 23:19:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:19:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2021-05-02 23:19:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:06,838 INFO L225 Difference]: With dead ends: 670 [2021-05-02 23:19:06,838 INFO L226 Difference]: Without dead ends: 653 [2021-05-02 23:19:06,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3338.4ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:19:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-05-02 23:19:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 206. [2021-05-02 23:19:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2021-05-02 23:19:06,843 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 203 [2021-05-02 23:19:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:06,843 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2021-05-02 23:19:06,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2021-05-02 23:19:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-05-02 23:19:06,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:06,844 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:06,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:19:06,844 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash 679486823, now seen corresponding path program 91 times [2021-05-02 23:19:06,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:06,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260768066] [2021-05-02 23:19:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:06,850 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:06,850 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:10,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:10,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:10,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260768066] [2021-05-02 23:19:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [260768066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:10,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:10,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:19:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093666403] [2021-05-02 23:19:10,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:19:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:19:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:19:10,206 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:11,861 INFO L93 Difference]: Finished difference Result 677 states and 865 transitions. [2021-05-02 23:19:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:19:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2021-05-02 23:19:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:11,874 INFO L225 Difference]: With dead ends: 677 [2021-05-02 23:19:11,875 INFO L226 Difference]: Without dead ends: 660 [2021-05-02 23:19:11,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3263.8ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:19:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-02 23:19:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 208. [2021-05-02 23:19:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2021-05-02 23:19:11,879 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 205 [2021-05-02 23:19:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:11,879 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2021-05-02 23:19:11,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2021-05-02 23:19:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-05-02 23:19:11,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:11,880 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:11,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:19:11,880 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash -463143163, now seen corresponding path program 92 times [2021-05-02 23:19:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939149817] [2021-05-02 23:19:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:11,885 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:11,885 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:15,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:15,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939149817] [2021-05-02 23:19:15,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [939149817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:15,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:15,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:19:15,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649232025] [2021-05-02 23:19:15,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:19:15,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:19:15,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:15,599 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:17,962 INFO L93 Difference]: Finished difference Result 684 states and 874 transitions. [2021-05-02 23:19:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:19:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2021-05-02 23:19:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:17,964 INFO L225 Difference]: With dead ends: 684 [2021-05-02 23:19:17,964 INFO L226 Difference]: Without dead ends: 667 [2021-05-02 23:19:17,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3621.6ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-05-02 23:19:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 210. [2021-05-02 23:19:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2021-05-02 23:19:17,969 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 207 [2021-05-02 23:19:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:17,969 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2021-05-02 23:19:17,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2021-05-02 23:19:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-05-02 23:19:17,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:17,970 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:17,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:19:17,970 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash 981068067, now seen corresponding path program 93 times [2021-05-02 23:19:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:17,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992008852] [2021-05-02 23:19:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:17,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:17,980 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:21,688 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992008852] [2021-05-02 23:19:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [992008852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:21,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:21,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:19:21,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293964313] [2021-05-02 23:19:21,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:19:21,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:19:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:21,690 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:23,730 INFO L93 Difference]: Finished difference Result 691 states and 883 transitions. [2021-05-02 23:19:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:19:23,730 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2021-05-02 23:19:23,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:23,731 INFO L225 Difference]: With dead ends: 691 [2021-05-02 23:19:23,731 INFO L226 Difference]: Without dead ends: 674 [2021-05-02 23:19:23,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3618.3ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-05-02 23:19:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 212. [2021-05-02 23:19:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0241545893719808) internal successors, (212), 207 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-05-02 23:19:23,736 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 209 [2021-05-02 23:19:23,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:23,736 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-05-02 23:19:23,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-05-02 23:19:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-05-02 23:19:23,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:23,737 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:23,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:19:23,737 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1593623489, now seen corresponding path program 94 times [2021-05-02 23:19:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:23,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56602245] [2021-05-02 23:19:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:23,740 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:23,741 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:27,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:27,643 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56602245] [2021-05-02 23:19:27,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [56602245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:27,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:27,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:19:27,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470062953] [2021-05-02 23:19:27,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:19:27,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:19:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:27,644 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:29,715 INFO L93 Difference]: Finished difference Result 698 states and 892 transitions. [2021-05-02 23:19:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:19:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2021-05-02 23:19:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:29,717 INFO L225 Difference]: With dead ends: 698 [2021-05-02 23:19:29,717 INFO L226 Difference]: Without dead ends: 681 [2021-05-02 23:19:29,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3807.7ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-05-02 23:19:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 214. [2021-05-02 23:19:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0239234449760766) internal successors, (214), 209 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2021-05-02 23:19:29,722 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 211 [2021-05-02 23:19:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:29,722 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2021-05-02 23:19:29,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0510204081632653) internal successors, (201), 97 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2021-05-02 23:19:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-05-02 23:19:29,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:29,723 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:29,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:19:29,723 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1848864479, now seen corresponding path program 95 times [2021-05-02 23:19:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:29,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762003886] [2021-05-02 23:19:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:29,739 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:29,740 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:33,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:33,867 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762003886] [2021-05-02 23:19:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [762003886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:33,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:33,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:19:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490213445] [2021-05-02 23:19:33,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:19:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:33,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:19:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:33,869 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:36,103 INFO L93 Difference]: Finished difference Result 705 states and 901 transitions. [2021-05-02 23:19:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:19:36,103 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2021-05-02 23:19:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:36,105 INFO L225 Difference]: With dead ends: 705 [2021-05-02 23:19:36,105 INFO L226 Difference]: Without dead ends: 688 [2021-05-02 23:19:36,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 4027.5ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-05-02 23:19:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 216. [2021-05-02 23:19:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2021-05-02 23:19:36,109 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 213 [2021-05-02 23:19:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:36,110 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2021-05-02 23:19:36,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2021-05-02 23:19:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-05-02 23:19:36,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:36,111 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:36,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:19:36,111 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1972647299, now seen corresponding path program 96 times [2021-05-02 23:19:36,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:36,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339152628] [2021-05-02 23:19:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:36,120 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:36,121 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:40,568 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:40,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339152628] [2021-05-02 23:19:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339152628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:40,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:40,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:19:40,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119188171] [2021-05-02 23:19:40,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:19:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:19:40,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:40,570 INFO L87 Difference]: Start difference. First operand 216 states and 220 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:43,449 INFO L93 Difference]: Finished difference Result 712 states and 910 transitions. [2021-05-02 23:19:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:19:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2021-05-02 23:19:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:43,451 INFO L225 Difference]: With dead ends: 712 [2021-05-02 23:19:43,451 INFO L226 Difference]: Without dead ends: 695 [2021-05-02 23:19:43,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4343.2ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-05-02 23:19:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 218. [2021-05-02 23:19:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0234741784037558) internal successors, (218), 213 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 222 transitions. [2021-05-02 23:19:43,456 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 222 transitions. Word has length 215 [2021-05-02 23:19:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:43,456 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 222 transitions. [2021-05-02 23:19:43,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 222 transitions. [2021-05-02 23:19:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-02 23:19:43,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:43,457 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:43,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:19:43,458 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:43,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2046539419, now seen corresponding path program 97 times [2021-05-02 23:19:43,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:43,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709494107] [2021-05-02 23:19:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:43,462 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:43,463 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:47,685 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:47,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709494107] [2021-05-02 23:19:47,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709494107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:47,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:47,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:19:47,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025936287] [2021-05-02 23:19:47,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:19:47,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:47,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:19:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:47,687 INFO L87 Difference]: Start difference. First operand 218 states and 222 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:50,084 INFO L93 Difference]: Finished difference Result 719 states and 919 transitions. [2021-05-02 23:19:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:19:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2021-05-02 23:19:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:50,086 INFO L225 Difference]: With dead ends: 719 [2021-05-02 23:19:50,086 INFO L226 Difference]: Without dead ends: 702 [2021-05-02 23:19:50,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4119.6ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-02 23:19:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 220. [2021-05-02 23:19:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2021-05-02 23:19:50,091 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 217 [2021-05-02 23:19:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:50,091 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2021-05-02 23:19:50,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 100 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2021-05-02 23:19:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-05-02 23:19:50,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:50,092 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:50,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:50,092 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash -985590983, now seen corresponding path program 98 times [2021-05-02 23:19:50,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:50,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529450994] [2021-05-02 23:19:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:50,096 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:50,097 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:54,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:54,568 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:54,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529450994] [2021-05-02 23:19:54,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529450994] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:54,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:54,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:19:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495881565] [2021-05-02 23:19:54,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:19:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:19:54,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:54,569 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:57,235 INFO L93 Difference]: Finished difference Result 726 states and 928 transitions. [2021-05-02 23:19:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:19:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2021-05-02 23:19:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:57,237 INFO L225 Difference]: With dead ends: 726 [2021-05-02 23:19:57,237 INFO L226 Difference]: Without dead ends: 709 [2021-05-02 23:19:57,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4364.4ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-05-02 23:19:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 222. [2021-05-02 23:19:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.023041474654378) internal successors, (222), 217 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2021-05-02 23:19:57,242 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 219 [2021-05-02 23:19:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:57,242 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2021-05-02 23:19:57,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2021-05-02 23:19:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 23:19:57,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:57,243 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:57,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:57,243 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1419886679, now seen corresponding path program 99 times [2021-05-02 23:19:57,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444572451] [2021-05-02 23:19:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:57,250 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:57,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:02,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:02,328 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:02,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444572451] [2021-05-02 23:20:02,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444572451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:02,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:02,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:20:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980055440] [2021-05-02 23:20:02,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:20:02,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:20:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:20:02,330 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:05,019 INFO L93 Difference]: Finished difference Result 733 states and 937 transitions. [2021-05-02 23:20:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:20:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2021-05-02 23:20:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:05,022 INFO L225 Difference]: With dead ends: 733 [2021-05-02 23:20:05,022 INFO L226 Difference]: Without dead ends: 716 [2021-05-02 23:20:05,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4965.0ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:20:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-05-02 23:20:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 224. [2021-05-02 23:20:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0228310502283104) internal successors, (224), 219 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2021-05-02 23:20:05,027 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 221 [2021-05-02 23:20:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:05,027 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2021-05-02 23:20:05,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2021-05-02 23:20:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 23:20:05,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:05,029 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:05,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:20:05,029 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1903452683, now seen corresponding path program 100 times [2021-05-02 23:20:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910345271] [2021-05-02 23:20:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:05,040 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:05,041 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:10,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:10,318 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:10,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910345271] [2021-05-02 23:20:10,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [910345271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:10,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:10,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:20:10,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559439346] [2021-05-02 23:20:10,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:20:10,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:20:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:20:10,320 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:13,652 INFO L93 Difference]: Finished difference Result 740 states and 946 transitions. [2021-05-02 23:20:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:20:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2021-05-02 23:20:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:13,655 INFO L225 Difference]: With dead ends: 740 [2021-05-02 23:20:13,655 INFO L226 Difference]: Without dead ends: 723 [2021-05-02 23:20:13,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5163.8ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:20:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-05-02 23:20:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 226. [2021-05-02 23:20:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0226244343891402) internal successors, (226), 221 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2021-05-02 23:20:13,660 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 223 [2021-05-02 23:20:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:13,660 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2021-05-02 23:20:13,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.048076923076923) internal successors, (213), 103 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2021-05-02 23:20:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 23:20:13,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:13,661 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:13,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:20:13,661 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -176911341, now seen corresponding path program 101 times [2021-05-02 23:20:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:13,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811628872] [2021-05-02 23:20:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:13,666 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:13,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:18,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:18,688 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:18,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811628872] [2021-05-02 23:20:18,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [811628872] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:18,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:18,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:20:18,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589894030] [2021-05-02 23:20:18,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:20:18,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:20:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:20:18,690 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:22,094 INFO L93 Difference]: Finished difference Result 747 states and 955 transitions. [2021-05-02 23:20:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:20:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 23:20:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:22,097 INFO L225 Difference]: With dead ends: 747 [2021-05-02 23:20:22,097 INFO L226 Difference]: Without dead ends: 730 [2021-05-02 23:20:22,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4903.3ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:20:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-05-02 23:20:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 228. [2021-05-02 23:20:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 223 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 232 transitions. [2021-05-02 23:20:22,102 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 232 transitions. Word has length 225 [2021-05-02 23:20:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:22,102 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 232 transitions. [2021-05-02 23:20:22,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 232 transitions. [2021-05-02 23:20:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 23:20:22,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:22,104 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:22,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:20:22,104 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1171942065, now seen corresponding path program 102 times [2021-05-02 23:20:22,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:22,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749300443] [2021-05-02 23:20:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:22,112 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:22,113 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:28,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:28,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749300443] [2021-05-02 23:20:28,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749300443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:28,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:28,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:20:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529241903] [2021-05-02 23:20:28,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:20:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:20:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:20:28,046 INFO L87 Difference]: Start difference. First operand 228 states and 232 transitions. Second operand has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:31,564 INFO L93 Difference]: Finished difference Result 754 states and 964 transitions. [2021-05-02 23:20:31,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:20:31,565 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-02 23:20:31,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:31,567 INFO L225 Difference]: With dead ends: 754 [2021-05-02 23:20:31,567 INFO L226 Difference]: Without dead ends: 737 [2021-05-02 23:20:31,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 5806.8ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:20:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-05-02 23:20:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 230. [2021-05-02 23:20:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0222222222222221) internal successors, (230), 225 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2021-05-02 23:20:31,572 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 227 [2021-05-02 23:20:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:31,572 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2021-05-02 23:20:31,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2021-05-02 23:20:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 23:20:31,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:31,573 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:20:31,574 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 339941839, now seen corresponding path program 103 times [2021-05-02 23:20:31,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:31,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269110823] [2021-05-02 23:20:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:31,582 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:31,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:37,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:37,666 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269110823] [2021-05-02 23:20:37,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269110823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:37,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:37,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:20:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975215377] [2021-05-02 23:20:37,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:20:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:20:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:37,669 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:40,749 INFO L93 Difference]: Finished difference Result 761 states and 973 transitions. [2021-05-02 23:20:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:20:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 23:20:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:40,752 INFO L225 Difference]: With dead ends: 761 [2021-05-02 23:20:40,752 INFO L226 Difference]: Without dead ends: 744 [2021-05-02 23:20:40,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 5955.6ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-05-02 23:20:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 232. [2021-05-02 23:20:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0220264317180616) internal successors, (232), 227 states have internal predecessors, (232), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2021-05-02 23:20:40,757 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 229 [2021-05-02 23:20:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:40,757 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2021-05-02 23:20:40,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.046728971962617) internal successors, (219), 106 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2021-05-02 23:20:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-05-02 23:20:40,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:40,758 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:40,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:20:40,758 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -348358291, now seen corresponding path program 104 times [2021-05-02 23:20:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:40,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874521537] [2021-05-02 23:20:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:40,764 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:40,765 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:46,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:46,361 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874521537] [2021-05-02 23:20:46,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874521537] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:46,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:46,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:20:46,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148614494] [2021-05-02 23:20:46,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:20:46,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:20:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:46,363 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:49,391 INFO L93 Difference]: Finished difference Result 768 states and 982 transitions. [2021-05-02 23:20:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:20:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2021-05-02 23:20:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:49,394 INFO L225 Difference]: With dead ends: 768 [2021-05-02 23:20:49,394 INFO L226 Difference]: Without dead ends: 751 [2021-05-02 23:20:49,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 5475.7ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-05-02 23:20:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 234. [2021-05-02 23:20:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 229 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2021-05-02 23:20:49,401 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 231 [2021-05-02 23:20:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:49,401 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2021-05-02 23:20:49,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0462962962962963) internal successors, (221), 107 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2021-05-02 23:20:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-02 23:20:49,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:49,403 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:49,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:20:49,403 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:49,403 INFO L82 PathProgramCache]: Analyzing trace with hash -379819637, now seen corresponding path program 105 times [2021-05-02 23:20:49,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:49,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640197000] [2021-05-02 23:20:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:49,413 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:49,414 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:55,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:55,460 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:55,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640197000] [2021-05-02 23:20:55,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640197000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:55,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:55,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:20:55,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183144968] [2021-05-02 23:20:55,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:20:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:20:55,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:55,462 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:58,360 INFO L93 Difference]: Finished difference Result 775 states and 991 transitions. [2021-05-02 23:20:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:20:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2021-05-02 23:20:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:58,364 INFO L225 Difference]: With dead ends: 775 [2021-05-02 23:20:58,364 INFO L226 Difference]: Without dead ends: 758 [2021-05-02 23:20:58,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 5906.4ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-05-02 23:20:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 236. [2021-05-02 23:20:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0216450216450217) internal successors, (236), 231 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2021-05-02 23:20:58,369 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 233 [2021-05-02 23:20:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:58,370 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2021-05-02 23:20:58,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 108 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2021-05-02 23:20:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 23:20:58,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:58,371 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:58,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:20:58,371 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash -549402071, now seen corresponding path program 106 times [2021-05-02 23:20:58,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:58,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124281604] [2021-05-02 23:20:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:58,376 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:58,377 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:05,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:05,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:05,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124281604] [2021-05-02 23:21:05,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124281604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:05,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:05,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:21:05,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048856086] [2021-05-02 23:21:05,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:21:05,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:21:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:21:05,092 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:09,449 INFO L93 Difference]: Finished difference Result 782 states and 1000 transitions. [2021-05-02 23:21:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:21:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2021-05-02 23:21:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:09,452 INFO L225 Difference]: With dead ends: 782 [2021-05-02 23:21:09,452 INFO L226 Difference]: Without dead ends: 765 [2021-05-02 23:21:09,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 6575.9ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:21:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-05-02 23:21:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 238. [2021-05-02 23:21:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0214592274678111) internal successors, (238), 233 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2021-05-02 23:21:09,458 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 235 [2021-05-02 23:21:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:09,458 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2021-05-02 23:21:09,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 109 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2021-05-02 23:21:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-05-02 23:21:09,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:09,459 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:09,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:21:09,459 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash -309363897, now seen corresponding path program 107 times [2021-05-02 23:21:09,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:09,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572490330] [2021-05-02 23:21:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:09,465 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:09,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:16,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572490330] [2021-05-02 23:21:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1572490330] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:16,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:16,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:21:16,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197913636] [2021-05-02 23:21:16,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:21:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:21:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:21:16,591 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:20,301 INFO L93 Difference]: Finished difference Result 789 states and 1009 transitions. [2021-05-02 23:21:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:21:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2021-05-02 23:21:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:20,303 INFO L225 Difference]: With dead ends: 789 [2021-05-02 23:21:20,303 INFO L226 Difference]: Without dead ends: 772 [2021-05-02 23:21:20,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 6976.6ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:21:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-05-02 23:21:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 240. [2021-05-02 23:21:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0212765957446808) internal successors, (240), 235 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2021-05-02 23:21:20,307 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 237 [2021-05-02 23:21:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:20,307 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2021-05-02 23:21:20,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.045045045045045) internal successors, (227), 110 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2021-05-02 23:21:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-02 23:21:20,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:20,308 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:20,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:21:20,308 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912667, now seen corresponding path program 108 times [2021-05-02 23:21:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:20,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659500927] [2021-05-02 23:21:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:20,324 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:20,324 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:28,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:28,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:28,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659500927] [2021-05-02 23:21:28,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1659500927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:28,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:28,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:21:28,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409102669] [2021-05-02 23:21:28,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:21:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:21:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:21:28,082 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:32,022 INFO L93 Difference]: Finished difference Result 796 states and 1018 transitions. [2021-05-02 23:21:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:21:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2021-05-02 23:21:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:32,025 INFO L225 Difference]: With dead ends: 796 [2021-05-02 23:21:32,025 INFO L226 Difference]: Without dead ends: 779 [2021-05-02 23:21:32,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 7615.2ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:21:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-05-02 23:21:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 242. [2021-05-02 23:21:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.021097046413502) internal successors, (242), 237 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2021-05-02 23:21:32,031 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 239 [2021-05-02 23:21:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:32,031 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2021-05-02 23:21:32,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.044642857142857) internal successors, (229), 111 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2021-05-02 23:21:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-05-02 23:21:32,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:32,032 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:32,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:21:32,032 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1708437757, now seen corresponding path program 109 times [2021-05-02 23:21:32,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:32,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393174496] [2021-05-02 23:21:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:32,041 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:32,042 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:40,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:40,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:40,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393174496] [2021-05-02 23:21:40,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [393174496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:40,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:40,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:21:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18081600] [2021-05-02 23:21:40,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:21:40,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:21:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:21:40,540 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:45,832 INFO L93 Difference]: Finished difference Result 803 states and 1027 transitions. [2021-05-02 23:21:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:21:45,834 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2021-05-02 23:21:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:45,836 INFO L225 Difference]: With dead ends: 803 [2021-05-02 23:21:45,837 INFO L226 Difference]: Without dead ends: 786 [2021-05-02 23:21:45,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 8339.5ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:21:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-05-02 23:21:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 244. [2021-05-02 23:21:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0209205020920502) internal successors, (244), 239 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 248 transitions. [2021-05-02 23:21:45,845 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 248 transitions. Word has length 241 [2021-05-02 23:21:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:45,845 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 248 transitions. [2021-05-02 23:21:45,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 112 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 248 transitions. [2021-05-02 23:21:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-05-02 23:21:45,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:45,846 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:45,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:21:45,847 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:45,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1746128479, now seen corresponding path program 110 times [2021-05-02 23:21:45,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:45,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477064043] [2021-05-02 23:21:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:45,858 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:45,859 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:54,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:54,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477064043] [2021-05-02 23:21:54,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477064043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:54,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:54,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:21:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863558769] [2021-05-02 23:21:54,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:21:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:21:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:54,490 INFO L87 Difference]: Start difference. First operand 244 states and 248 transitions. Second operand has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:59,090 INFO L93 Difference]: Finished difference Result 810 states and 1036 transitions. [2021-05-02 23:21:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:21:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2021-05-02 23:21:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:59,092 INFO L225 Difference]: With dead ends: 810 [2021-05-02 23:21:59,092 INFO L226 Difference]: Without dead ends: 793 [2021-05-02 23:21:59,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 8447.6ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-05-02 23:21:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 246. [2021-05-02 23:21:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.020746887966805) internal successors, (246), 241 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 250 transitions. [2021-05-02 23:21:59,097 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 250 transitions. Word has length 243 [2021-05-02 23:21:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:59,097 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 250 transitions. [2021-05-02 23:21:59,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.043859649122807) internal successors, (233), 113 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 250 transitions. [2021-05-02 23:21:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 23:21:59,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:59,098 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:59,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:21:59,098 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash 687793343, now seen corresponding path program 111 times [2021-05-02 23:21:59,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:59,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97206771] [2021-05-02 23:21:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:59,112 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:59,113 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:05,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:05,864 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:05,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97206771] [2021-05-02 23:22:05,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [97206771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:05,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:05,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:22:05,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792922400] [2021-05-02 23:22:05,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:22:05,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:05,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:22:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:22:05,866 INFO L87 Difference]: Start difference. First operand 246 states and 250 transitions. Second operand has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:09,771 INFO L93 Difference]: Finished difference Result 817 states and 1045 transitions. [2021-05-02 23:22:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:22:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2021-05-02 23:22:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:09,774 INFO L225 Difference]: With dead ends: 817 [2021-05-02 23:22:09,774 INFO L226 Difference]: Without dead ends: 800 [2021-05-02 23:22:09,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6612.8ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:22:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-05-02 23:22:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 248. [2021-05-02 23:22:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0205761316872428) internal successors, (248), 243 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2021-05-02 23:22:09,781 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 245 [2021-05-02 23:22:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:09,781 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2021-05-02 23:22:09,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0434782608695654) internal successors, (235), 114 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2021-05-02 23:22:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-02 23:22:09,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:09,782 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:09,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:22:09,782 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1070512035, now seen corresponding path program 112 times [2021-05-02 23:22:09,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:09,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876364259] [2021-05-02 23:22:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:09,788 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:09,789 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:16,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:16,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876364259] [2021-05-02 23:22:16,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876364259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:16,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:16,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:22:16,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870185666] [2021-05-02 23:22:16,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:22:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:22:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:22:16,936 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:21,146 INFO L93 Difference]: Finished difference Result 824 states and 1054 transitions. [2021-05-02 23:22:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:22:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2021-05-02 23:22:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:21,149 INFO L225 Difference]: With dead ends: 824 [2021-05-02 23:22:21,149 INFO L226 Difference]: Without dead ends: 807 [2021-05-02 23:22:21,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6995.5ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:22:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-05-02 23:22:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 250. [2021-05-02 23:22:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0204081632653061) internal successors, (250), 245 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2021-05-02 23:22:21,155 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 247 [2021-05-02 23:22:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:21,155 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2021-05-02 23:22:21,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.043103448275862) internal successors, (237), 115 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2021-05-02 23:22:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-05-02 23:22:21,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:21,156 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:21,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:22:21,156 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1415134331, now seen corresponding path program 113 times [2021-05-02 23:22:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:21,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887728574] [2021-05-02 23:22:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:21,168 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:21,170 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:30,236 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:30,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887728574] [2021-05-02 23:22:30,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [887728574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:30,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:30,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:22:30,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659800563] [2021-05-02 23:22:30,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:22:30,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:22:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:22:30,239 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:36,022 INFO L93 Difference]: Finished difference Result 831 states and 1063 transitions. [2021-05-02 23:22:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:22:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2021-05-02 23:22:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:36,026 INFO L225 Difference]: With dead ends: 831 [2021-05-02 23:22:36,026 INFO L226 Difference]: Without dead ends: 814 [2021-05-02 23:22:36,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8899.1ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:22:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-05-02 23:22:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 252. [2021-05-02 23:22:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.0202429149797572) internal successors, (252), 247 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2021-05-02 23:22:36,032 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 249 [2021-05-02 23:22:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:36,032 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2021-05-02 23:22:36,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2021-05-02 23:22:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 23:22:36,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:36,033 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:36,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:22:36,034 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2119475481, now seen corresponding path program 114 times [2021-05-02 23:22:36,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:36,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11077507] [2021-05-02 23:22:36,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:36,039 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:36,040 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:46,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:46,462 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:46,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11077507] [2021-05-02 23:22:46,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [11077507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:46,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:46,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:22:46,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190686216] [2021-05-02 23:22:46,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:22:46,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:22:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:22:46,465 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:52,054 INFO L93 Difference]: Finished difference Result 838 states and 1072 transitions. [2021-05-02 23:22:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:22:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2021-05-02 23:22:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:52,058 INFO L225 Difference]: With dead ends: 838 [2021-05-02 23:22:52,059 INFO L226 Difference]: Without dead ends: 821 [2021-05-02 23:22:52,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 10231.2ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:22:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-05-02 23:22:52,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 254. [2021-05-02 23:22:52,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0200803212851406) internal successors, (254), 249 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 258 transitions. [2021-05-02 23:22:52,066 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 258 transitions. Word has length 251 [2021-05-02 23:22:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:52,066 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 258 transitions. [2021-05-02 23:22:52,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.042372881355932) internal successors, (241), 117 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 258 transitions. [2021-05-02 23:22:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 23:22:52,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:52,068 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:52,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:22:52,068 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash 386487863, now seen corresponding path program 115 times [2021-05-02 23:22:52,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:52,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009319184] [2021-05-02 23:22:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:52,076 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:52,077 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:01,555 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009319184] [2021-05-02 23:23:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009319184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:23:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871613597] [2021-05-02 23:23:01,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:23:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:23:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:23:01,558 INFO L87 Difference]: Start difference. First operand 254 states and 258 transitions. Second operand has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:07,672 INFO L93 Difference]: Finished difference Result 845 states and 1081 transitions. [2021-05-02 23:23:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:23:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2021-05-02 23:23:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:07,676 INFO L225 Difference]: With dead ends: 845 [2021-05-02 23:23:07,676 INFO L226 Difference]: Without dead ends: 828 [2021-05-02 23:23:07,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 9282.2ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:23:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-05-02 23:23:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 256. [2021-05-02 23:23:07,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0199203187250996) internal successors, (256), 251 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2021-05-02 23:23:07,683 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 253 [2021-05-02 23:23:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:07,684 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2021-05-02 23:23:07,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.042016806722689) internal successors, (243), 118 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2021-05-02 23:23:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-05-02 23:23:07,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:07,685 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:07,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:23:07,685 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1432697813, now seen corresponding path program 116 times [2021-05-02 23:23:07,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:07,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510138010] [2021-05-02 23:23:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:07,692 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:07,693 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:20,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:20,310 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:20,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510138010] [2021-05-02 23:23:20,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510138010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:20,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:20,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:23:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223359310] [2021-05-02 23:23:20,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:23:20,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:23:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:23:20,312 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:27,456 INFO L93 Difference]: Finished difference Result 852 states and 1090 transitions. [2021-05-02 23:23:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:23:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2021-05-02 23:23:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:27,462 INFO L225 Difference]: With dead ends: 852 [2021-05-02 23:23:27,462 INFO L226 Difference]: Without dead ends: 835 [2021-05-02 23:23:27,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 12404.2ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:23:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-05-02 23:23:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 258. [2021-05-02 23:23:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.0197628458498025) internal successors, (258), 253 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2021-05-02 23:23:27,471 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 255 [2021-05-02 23:23:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:27,471 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2021-05-02 23:23:27,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0416666666666665) internal successors, (245), 119 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2021-05-02 23:23:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-05-02 23:23:27,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:27,472 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:27,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:23:27,473 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1818112499, now seen corresponding path program 117 times [2021-05-02 23:23:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:27,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314815891] [2021-05-02 23:23:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:27,483 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:27,485 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:40,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:40,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:40,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314815891] [2021-05-02 23:23:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314815891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:23:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488333494] [2021-05-02 23:23:40,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:23:40,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:40,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:23:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:23:40,120 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:46,649 INFO L93 Difference]: Finished difference Result 859 states and 1099 transitions. [2021-05-02 23:23:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:23:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2021-05-02 23:23:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:46,652 INFO L225 Difference]: With dead ends: 859 [2021-05-02 23:23:46,652 INFO L226 Difference]: Without dead ends: 842 [2021-05-02 23:23:46,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 12394.4ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:23:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-05-02 23:23:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 260. [2021-05-02 23:23:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0196078431372548) internal successors, (260), 255 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2021-05-02 23:23:46,660 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 257 [2021-05-02 23:23:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:46,661 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2021-05-02 23:23:46,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.041322314049587) internal successors, (247), 120 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2021-05-02 23:23:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-05-02 23:23:46,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:46,662 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:46,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:23:46,662 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1460529007, now seen corresponding path program 118 times [2021-05-02 23:23:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:46,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305866072] [2021-05-02 23:23:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:46,672 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:46,673 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:59,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:59,293 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:59,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305866072] [2021-05-02 23:23:59,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305866072] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:59,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:59,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:23:59,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006072446] [2021-05-02 23:23:59,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:23:59,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:23:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:23:59,296 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:05,708 INFO L93 Difference]: Finished difference Result 866 states and 1108 transitions. [2021-05-02 23:24:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:24:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2021-05-02 23:24:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:05,715 INFO L225 Difference]: With dead ends: 866 [2021-05-02 23:24:05,715 INFO L226 Difference]: Without dead ends: 849 [2021-05-02 23:24:05,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 12389.7ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:24:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-02 23:24:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 262. [2021-05-02 23:24:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0194552529182879) internal successors, (262), 257 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 266 transitions. [2021-05-02 23:24:05,724 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 266 transitions. Word has length 259 [2021-05-02 23:24:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:05,724 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 266 transitions. [2021-05-02 23:24:05,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.040983606557377) internal successors, (249), 121 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 266 transitions. [2021-05-02 23:24:05,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 23:24:05,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:05,726 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:05,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:24:05,726 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:05,727 INFO L82 PathProgramCache]: Analyzing trace with hash 270978991, now seen corresponding path program 119 times [2021-05-02 23:24:05,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:05,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630943167] [2021-05-02 23:24:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:05,734 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:05,736 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:18,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:18,502 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630943167] [2021-05-02 23:24:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630943167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:18,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:18,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:24:18,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642194712] [2021-05-02 23:24:18,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:24:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:24:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:24:18,504 INFO L87 Difference]: Start difference. First operand 262 states and 266 transitions. Second operand has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:25,694 INFO L93 Difference]: Finished difference Result 873 states and 1117 transitions. [2021-05-02 23:24:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:24:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2021-05-02 23:24:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:25,700 INFO L225 Difference]: With dead ends: 873 [2021-05-02 23:24:25,700 INFO L226 Difference]: Without dead ends: 856 [2021-05-02 23:24:25,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 12534.8ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:24:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-05-02 23:24:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 264. [2021-05-02 23:24:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0193050193050193) internal successors, (264), 259 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2021-05-02 23:24:25,709 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 261 [2021-05-02 23:24:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:25,710 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2021-05-02 23:24:25,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.040650406504065) internal successors, (251), 122 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2021-05-02 23:24:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 23:24:25,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:25,711 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:25,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:24:25,711 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:25,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2097821517, now seen corresponding path program 120 times [2021-05-02 23:24:25,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:25,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835174875] [2021-05-02 23:24:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:25,721 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:25,722 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:39,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:39,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:39,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835174875] [2021-05-02 23:24:39,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1835174875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:39,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:39,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:24:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928482169] [2021-05-02 23:24:39,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:24:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:24:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:24:39,068 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:46,055 INFO L93 Difference]: Finished difference Result 880 states and 1126 transitions. [2021-05-02 23:24:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:24:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2021-05-02 23:24:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:46,060 INFO L225 Difference]: With dead ends: 880 [2021-05-02 23:24:46,060 INFO L226 Difference]: Without dead ends: 863 [2021-05-02 23:24:46,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 13102.2ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:24:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-05-02 23:24:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 266. [2021-05-02 23:24:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0191570881226053) internal successors, (266), 261 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2021-05-02 23:24:46,068 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 263 [2021-05-02 23:24:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:46,068 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2021-05-02 23:24:46,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0403225806451615) internal successors, (253), 123 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2021-05-02 23:24:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-05-02 23:24:46,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:46,070 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:46,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:24:46,070 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:46,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1051864939, now seen corresponding path program 121 times [2021-05-02 23:24:46,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:46,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366306056] [2021-05-02 23:24:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:46,083 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:46,084 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:59,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:59,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366306056] [2021-05-02 23:24:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366306056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:59,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:59,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:24:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817095425] [2021-05-02 23:24:59,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:24:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:24:59,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:24:59,035 INFO L87 Difference]: Start difference. First operand 266 states and 270 transitions. Second operand has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:08,492 INFO L93 Difference]: Finished difference Result 887 states and 1135 transitions. [2021-05-02 23:25:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:25:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2021-05-02 23:25:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:08,499 INFO L225 Difference]: With dead ends: 887 [2021-05-02 23:25:08,499 INFO L226 Difference]: Without dead ends: 870 [2021-05-02 23:25:08,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 12709.8ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:25:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-05-02 23:25:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 268. [2021-05-02 23:25:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0190114068441065) internal successors, (268), 263 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2021-05-02 23:25:08,508 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 265 [2021-05-02 23:25:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:08,508 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2021-05-02 23:25:08,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.04) internal successors, (255), 124 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2021-05-02 23:25:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-05-02 23:25:08,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:08,510 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:08,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:25:08,510 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash 909940745, now seen corresponding path program 122 times [2021-05-02 23:25:08,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:08,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243616143] [2021-05-02 23:25:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:08,520 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:08,521 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:24,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:24,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:24,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243616143] [2021-05-02 23:25:24,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243616143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:24,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:24,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:25:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490056828] [2021-05-02 23:25:24,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:25:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:24,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:25:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:25:24,299 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:34,013 INFO L93 Difference]: Finished difference Result 894 states and 1144 transitions. [2021-05-02 23:25:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:25:34,016 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2021-05-02 23:25:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:34,019 INFO L225 Difference]: With dead ends: 894 [2021-05-02 23:25:34,019 INFO L226 Difference]: Without dead ends: 877 [2021-05-02 23:25:34,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 15524.6ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:25:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-05-02 23:25:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 270. [2021-05-02 23:25:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0188679245283019) internal successors, (270), 265 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 274 transitions. [2021-05-02 23:25:34,028 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 274 transitions. Word has length 267 [2021-05-02 23:25:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:34,029 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 274 transitions. [2021-05-02 23:25:34,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0396825396825395) internal successors, (257), 125 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,029 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 274 transitions. [2021-05-02 23:25:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-05-02 23:25:34,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:34,030 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:34,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:25:34,031 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1959743783, now seen corresponding path program 123 times [2021-05-02 23:25:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:34,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494608027] [2021-05-02 23:25:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:34,045 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:34,047 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:48,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:48,501 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:48,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494608027] [2021-05-02 23:25:48,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [494608027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:48,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:48,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:25:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164112384] [2021-05-02 23:25:48,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:25:48,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:25:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:25:48,504 INFO L87 Difference]: Start difference. First operand 270 states and 274 transitions. Second operand has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:56,600 INFO L93 Difference]: Finished difference Result 901 states and 1153 transitions. [2021-05-02 23:25:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:25:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2021-05-02 23:25:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:56,604 INFO L225 Difference]: With dead ends: 901 [2021-05-02 23:25:56,605 INFO L226 Difference]: Without dead ends: 884 [2021-05-02 23:25:56,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14175.8ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:25:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-02 23:25:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 272. [2021-05-02 23:25:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0187265917602997) internal successors, (272), 267 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2021-05-02 23:25:56,612 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 269 [2021-05-02 23:25:56,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:56,612 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2021-05-02 23:25:56,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0393700787401574) internal successors, (259), 126 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2021-05-02 23:25:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-05-02 23:25:56,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:56,614 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:56,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:25:56,614 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1503148741, now seen corresponding path program 124 times [2021-05-02 23:25:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:56,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882573273] [2021-05-02 23:25:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:56,624 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:56,625 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:14,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:14,968 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:14,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882573273] [2021-05-02 23:26:14,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882573273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:14,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:14,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:26:14,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907404876] [2021-05-02 23:26:14,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:26:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:26:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:26:14,971 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:23,230 INFO L93 Difference]: Finished difference Result 908 states and 1162 transitions. [2021-05-02 23:26:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:26:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2021-05-02 23:26:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:23,239 INFO L225 Difference]: With dead ends: 908 [2021-05-02 23:26:23,239 INFO L226 Difference]: Without dead ends: 891 [2021-05-02 23:26:23,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 18073.9ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:26:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-05-02 23:26:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 274. [2021-05-02 23:26:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0185873605947955) internal successors, (274), 269 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 278 transitions. [2021-05-02 23:26:23,250 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 278 transitions. Word has length 271 [2021-05-02 23:26:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:23,250 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 278 transitions. [2021-05-02 23:26:23,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0390625) internal successors, (261), 127 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 278 transitions. [2021-05-02 23:26:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-05-02 23:26:23,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:23,252 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:23,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:26:23,252 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 801977571, now seen corresponding path program 125 times [2021-05-02 23:26:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609300607] [2021-05-02 23:26:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:23,263 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:23,264 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:41,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:41,999 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:41,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609300607] [2021-05-02 23:26:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609300607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:42,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:42,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:26:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059505864] [2021-05-02 23:26:42,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:26:42,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:26:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:26:42,003 INFO L87 Difference]: Start difference. First operand 274 states and 278 transitions. Second operand has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:53,043 INFO L93 Difference]: Finished difference Result 915 states and 1171 transitions. [2021-05-02 23:26:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:26:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2021-05-02 23:26:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:53,053 INFO L225 Difference]: With dead ends: 915 [2021-05-02 23:26:53,053 INFO L226 Difference]: Without dead ends: 898 [2021-05-02 23:26:53,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 18454.5ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:26:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-05-02 23:26:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 276. [2021-05-02 23:26:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.018450184501845) internal successors, (276), 271 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:53,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2021-05-02 23:26:53,063 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 273 [2021-05-02 23:26:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:53,063 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2021-05-02 23:26:53,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 128 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2021-05-02 23:26:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-02 23:26:53,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:53,065 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:53,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:26:53,065 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1286348673, now seen corresponding path program 126 times [2021-05-02 23:26:53,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:53,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653190113] [2021-05-02 23:26:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:53,077 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:53,079 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:16,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:16,392 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:16,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653190113] [2021-05-02 23:27:16,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [653190113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:16,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:16,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:27:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538204147] [2021-05-02 23:27:16,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:27:16,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:27:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:27:16,396 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:26,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:26,961 INFO L93 Difference]: Finished difference Result 922 states and 1180 transitions. [2021-05-02 23:27:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:27:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2021-05-02 23:27:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:26,966 INFO L225 Difference]: With dead ends: 922 [2021-05-02 23:27:26,966 INFO L226 Difference]: Without dead ends: 905 [2021-05-02 23:27:26,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 22993.4ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:27:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-05-02 23:27:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 278. [2021-05-02 23:27:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.0183150183150182) internal successors, (278), 273 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2021-05-02 23:27:26,972 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 275 [2021-05-02 23:27:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:26,973 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2021-05-02 23:27:26,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0384615384615383) internal successors, (265), 129 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2021-05-02 23:27:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-05-02 23:27:26,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:26,974 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:26,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:27:26,974 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1384457569, now seen corresponding path program 127 times [2021-05-02 23:27:26,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:26,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783205986] [2021-05-02 23:27:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:26,990 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:26,991 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:44,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:44,799 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783205986] [2021-05-02 23:27:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783205986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:44,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:44,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:27:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725656610] [2021-05-02 23:27:44,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:27:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:44,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:27:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:27:44,802 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:53,525 INFO L93 Difference]: Finished difference Result 929 states and 1189 transitions. [2021-05-02 23:27:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:27:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2021-05-02 23:27:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:53,528 INFO L225 Difference]: With dead ends: 929 [2021-05-02 23:27:53,528 INFO L226 Difference]: Without dead ends: 912 [2021-05-02 23:27:53,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 17551.2ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:27:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-05-02 23:27:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 280. [2021-05-02 23:27:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 284 transitions. [2021-05-02 23:27:53,535 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 284 transitions. Word has length 277 [2021-05-02 23:27:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:53,535 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 284 transitions. [2021-05-02 23:27:53,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 284 transitions. [2021-05-02 23:27:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-05-02 23:27:53,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:53,536 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:53,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:27:53,537 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 361186877, now seen corresponding path program 128 times [2021-05-02 23:27:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:53,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045166347] [2021-05-02 23:27:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:53,558 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:53,559 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:16,880 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:16,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045166347] [2021-05-02 23:28:16,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045166347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:16,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:16,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:28:16,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204101317] [2021-05-02 23:28:16,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:28:16,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:16,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:28:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:28:16,883 INFO L87 Difference]: Start difference. First operand 280 states and 284 transitions. Second operand has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:26,116 INFO L93 Difference]: Finished difference Result 936 states and 1198 transitions. [2021-05-02 23:28:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:28:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2021-05-02 23:28:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:26,122 INFO L225 Difference]: With dead ends: 936 [2021-05-02 23:28:26,122 INFO L226 Difference]: Without dead ends: 919 [2021-05-02 23:28:26,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 23051.0ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:28:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-05-02 23:28:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 282. [2021-05-02 23:28:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0180505415162455) internal successors, (282), 277 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 286 transitions. [2021-05-02 23:28:26,129 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 286 transitions. Word has length 279 [2021-05-02 23:28:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:26,129 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 286 transitions. [2021-05-02 23:28:26,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.037878787878788) internal successors, (269), 131 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 286 transitions. [2021-05-02 23:28:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-05-02 23:28:26,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:26,131 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:26,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:28:26,131 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1406713253, now seen corresponding path program 129 times [2021-05-02 23:28:26,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:26,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844984808] [2021-05-02 23:28:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:26,137 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:26,139 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:45,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:45,830 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:45,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844984808] [2021-05-02 23:28:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [844984808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:45,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:45,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:28:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324912802] [2021-05-02 23:28:45,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:28:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:28:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:28:45,833 INFO L87 Difference]: Start difference. First operand 282 states and 286 transitions. Second operand has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:52,917 INFO L93 Difference]: Finished difference Result 943 states and 1207 transitions. [2021-05-02 23:28:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:28:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2021-05-02 23:28:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:52,919 INFO L225 Difference]: With dead ends: 943 [2021-05-02 23:28:52,919 INFO L226 Difference]: Without dead ends: 926 [2021-05-02 23:28:52,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 19400.5ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:28:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-05-02 23:28:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 284. [2021-05-02 23:28:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.017921146953405) internal successors, (284), 279 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2021-05-02 23:28:52,925 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 281 [2021-05-02 23:28:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:52,925 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2021-05-02 23:28:52,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.037593984962406) internal successors, (271), 132 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2021-05-02 23:28:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-05-02 23:28:52,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:52,926 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:52,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:28:52,926 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 448311033, now seen corresponding path program 130 times [2021-05-02 23:28:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:52,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992530475] [2021-05-02 23:28:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:52,930 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:52,931 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:03,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:03,791 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:03,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992530475] [2021-05-02 23:29:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [992530475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:03,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:03,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:29:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299618724] [2021-05-02 23:29:03,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:29:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:03,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:29:03,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:29:03,794 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:11,316 INFO L93 Difference]: Finished difference Result 950 states and 1216 transitions. [2021-05-02 23:29:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:29:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2021-05-02 23:29:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:11,320 INFO L225 Difference]: With dead ends: 950 [2021-05-02 23:29:11,320 INFO L226 Difference]: Without dead ends: 933 [2021-05-02 23:29:11,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 10689.3ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:29:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-05-02 23:29:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 286. [2021-05-02 23:29:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.0177935943060499) internal successors, (286), 281 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 290 transitions. [2021-05-02 23:29:11,326 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 290 transitions. Word has length 283 [2021-05-02 23:29:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:11,326 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 290 transitions. [2021-05-02 23:29:11,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.037313432835821) internal successors, (273), 133 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 290 transitions. [2021-05-02 23:29:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-05-02 23:29:11,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:11,327 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:11,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:29:11,328 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash 715222039, now seen corresponding path program 131 times [2021-05-02 23:29:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:11,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131122577] [2021-05-02 23:29:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:11,333 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:11,334 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:23,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:23,048 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131122577] [2021-05-02 23:29:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [131122577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:23,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:23,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:29:23,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005757930] [2021-05-02 23:29:23,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:29:23,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:29:23,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:29:23,050 INFO L87 Difference]: Start difference. First operand 286 states and 290 transitions. Second operand has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:31,091 INFO L93 Difference]: Finished difference Result 957 states and 1225 transitions. [2021-05-02 23:29:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:29:31,093 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2021-05-02 23:29:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:31,094 INFO L225 Difference]: With dead ends: 957 [2021-05-02 23:29:31,095 INFO L226 Difference]: Without dead ends: 940 [2021-05-02 23:29:31,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 11509.0ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:29:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-05-02 23:29:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 288. [2021-05-02 23:29:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.017667844522968) internal successors, (288), 283 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2021-05-02 23:29:31,100 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 285 [2021-05-02 23:29:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:31,101 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2021-05-02 23:29:31,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.037037037037037) internal successors, (275), 134 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2021-05-02 23:29:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-05-02 23:29:31,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:31,102 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:31,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:29:31,102 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash -481338955, now seen corresponding path program 132 times [2021-05-02 23:29:31,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:31,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730028118] [2021-05-02 23:29:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:31,107 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:31,108 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat