/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_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:30,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:30,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:30,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:30,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:30,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:30,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:30,523 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 23:16:30,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:30,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:30,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:30,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:30,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:30,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:30,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:30,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:30,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:30,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:30,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:30,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:30,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:30,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:30,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:30,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:30,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:30,555 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:30,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:30,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:30,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:30,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:30,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:30,831 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:30,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 23:16:30,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9433caf0/a654ba3a12c9404eb496e8021b16f43b/FLAG24cbad88b [2021-05-02 23:16:31,215 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:31,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 23:16:31,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9433caf0/a654ba3a12c9404eb496e8021b16f43b/FLAG24cbad88b [2021-05-02 23:16:31,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9433caf0/a654ba3a12c9404eb496e8021b16f43b [2021-05-02 23:16:31,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:31,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:31,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:31,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:31,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:31,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15854225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31, skipping insertion in model container [2021-05-02 23:16:31,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:31,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:31,796 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_4.i[848,861] [2021-05-02 23:16:31,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:31,812 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:31,820 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_4.i[848,861] [2021-05-02 23:16:31,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:31,843 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:31,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31 WrapperNode [2021-05-02 23:16:31,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:31,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:31,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:31,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:31,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (1/1) ... [2021-05-02 23:16:31,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:31,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:31,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:31,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:31,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (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 23:16:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:16:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:16:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:16:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:32,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:32,198 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:16:32,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:32 BoogieIcfgContainer [2021-05-02 23:16:32,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:32,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:32,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:32,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:32,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:31" (1/3) ... [2021-05-02 23:16:32,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9ab760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:32, skipping insertion in model container [2021-05-02 23:16:32,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:31" (2/3) ... [2021-05-02 23:16:32,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9ab760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:32, skipping insertion in model container [2021-05-02 23:16:32,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:32" (3/3) ... [2021-05-02 23:16:32,204 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.i [2021-05-02 23:16:32,207 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:32,222 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:32,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:32,263 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:32,263 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:32,263 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:32,263 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:32,263 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:32,263 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:32,263 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:32,263 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 23:16:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:16:32,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,282 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,282 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -615726646, now seen corresponding path program 1 times [2021-05-02 23:16:32,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382844143] [2021-05-02 23:16:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,333 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,463 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 23:16:32,465 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382844143] [2021-05-02 23:16:32,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [382844143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:32,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706309837] [2021-05-02 23:16:32,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:32,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:32,478 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 23:16:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,534 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 23:16:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:32,536 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 23:16:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,539 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:16:32,540 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:16:32,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:16:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:16:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 23:16:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 23:16:32,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 23:16:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,566 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 23:16:32,566 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 23:16:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 23:16:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:32,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,567 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:32,567 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 238110415, now seen corresponding path program 1 times [2021-05-02 23:16:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631893379] [2021-05-02 23:16:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,570 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,634 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 23:16:32,634 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631893379] [2021-05-02 23:16:32,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631893379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:32,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462700896] [2021-05-02 23:16:32,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:32,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:32,646 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,699 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 23:16:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 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 14 [2021-05-02 23:16:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,701 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:16:32,701 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:16:32,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:16:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-05-02 23:16:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 23:16:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 23:16:32,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-02 23:16:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,706 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 23:16:32,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 23:16:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:16:32,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,707 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:32,707 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1502803825, now seen corresponding path program 1 times [2021-05-02 23:16:32,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865178891] [2021-05-02 23:16:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,720 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,722 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,776 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 23:16:32,776 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865178891] [2021-05-02 23:16:32,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865178891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:32,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249966264] [2021-05-02 23:16:32,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:32,777 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,816 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-05-02 23:16:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2021-05-02 23:16:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,817 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:16:32,817 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:16:32,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:16:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-05-02 23:16:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 23:16:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 23:16:32,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-05-02 23:16:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,821 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 23:16:32,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 23:16:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:16:32,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,822 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:32,822 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1397426067, now seen corresponding path program 2 times [2021-05-02 23:16:32,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233195393] [2021-05-02 23:16:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,827 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,948 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 23:16:32,948 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233195393] [2021-05-02 23:16:32,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [233195393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:32,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089223994] [2021-05-02 23:16:32,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:32,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:32,950 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,049 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-05-02 23:16:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 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 18 [2021-05-02 23:16:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,051 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:16:33,051 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:16:33,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:16:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 23:16:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 23:16:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 23:16:33,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-05-02 23:16:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,058 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 23:16:33,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 23:16:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:16:33,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,058 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:33,059 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash -706411172, now seen corresponding path program 1 times [2021-05-02 23:16:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651053041] [2021-05-02 23:16:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,063 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,064 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,174 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 23:16:33,174 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651053041] [2021-05-02 23:16:33,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651053041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:33,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108927916] [2021-05-02 23:16:33,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:33,177 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,291 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-05-02 23:16:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 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 21 [2021-05-02 23:16:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,293 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:16:33,293 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:16:33,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:16:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-02 23:16:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 23:16:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-05-02 23:16:33,306 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-05-02 23:16:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,306 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-05-02 23:16:33,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-05-02 23:16:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:16:33,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,307 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:33,307 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 336152307, now seen corresponding path program 2 times [2021-05-02 23:16:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779029935] [2021-05-02 23:16:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,315 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,319 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,420 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 23:16:33,421 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779029935] [2021-05-02 23:16:33,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779029935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:33,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994587807] [2021-05-02 23:16:33,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:33,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:33,422 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,483 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 23:16:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 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 24 [2021-05-02 23:16:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,486 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:16:33,486 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:16:33,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:16:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-05-02 23:16:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 23:16:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-05-02 23:16:33,498 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-05-02 23:16:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,498 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-05-02 23:16:33,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-05-02 23:16:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:16:33,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,499 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:33,499 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -842525419, now seen corresponding path program 3 times [2021-05-02 23:16:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258987945] [2021-05-02 23:16:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,505 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,506 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,584 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 23:16:33,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258987945] [2021-05-02 23:16:33,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1258987945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322792170] [2021-05-02 23:16:33,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:33,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:33,586 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,642 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-02 23:16:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 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 26 [2021-05-02 23:16:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,646 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:16:33,646 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:16:33,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:16:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-05-02 23:16:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 23:16:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 23:16:33,651 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-05-02 23:16:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,652 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 23:16:33,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 23:16:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:16:33,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,665 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:33,665 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 319546039, now seen corresponding path program 4 times [2021-05-02 23:16:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987130501] [2021-05-02 23:16:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,673 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,673 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,739 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 23:16:33,747 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 23:16:33,748 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987130501] [2021-05-02 23:16:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [987130501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855264231] [2021-05-02 23:16:33,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:33,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:33,751 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,800 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-02 23:16:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:33,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 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 28 [2021-05-02 23:16:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,801 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:16:33,801 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:16:33,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:16:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-05-02 23:16:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 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 23:16:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-05-02 23:16:33,813 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2021-05-02 23:16:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,814 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-05-02 23:16:33,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-05-02 23:16:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:16:33,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,817 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:33,819 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash 378720217, now seen corresponding path program 5 times [2021-05-02 23:16:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366981188] [2021-05-02 23:16:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,832 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,833 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,909 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 23:16:33,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366981188] [2021-05-02 23:16:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366981188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440945566] [2021-05-02 23:16:33,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:33,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:33,912 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,968 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-02 23:16:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 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 30 [2021-05-02 23:16:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,971 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:16:33,971 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:16:33,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:16:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-05-02 23:16:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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 23:16:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-02 23:16:33,981 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-05-02 23:16:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,981 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-02 23:16:33,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-02 23:16:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:16:33,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,982 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:33,982 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1410530427, now seen corresponding path program 6 times [2021-05-02 23:16:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125786976] [2021-05-02 23:16:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,987 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,988 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,077 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 23:16:34,078 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125786976] [2021-05-02 23:16:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [125786976] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:34,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487816242] [2021-05-02 23:16:34,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:34,080 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,157 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-05-02 23:16:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 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 32 [2021-05-02 23:16:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,158 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:16:34,158 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:16:34,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:16:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2021-05-02 23:16:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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 23:16:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 23:16:34,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-05-02 23:16:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,162 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 23:16:34,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 23:16:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:16:34,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,162 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:34,163 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 842696861, now seen corresponding path program 7 times [2021-05-02 23:16:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480532051] [2021-05-02 23:16:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,166 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,167 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,234 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 23:16:34,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480532051] [2021-05-02 23:16:34,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [480532051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:34,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640115405] [2021-05-02 23:16:34,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:34,235 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,294 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-05-02 23:16:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 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 34 [2021-05-02 23:16:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,295 INFO L225 Difference]: With dead ends: 77 [2021-05-02 23:16:34,295 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:16:34,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:16:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2021-05-02 23:16:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 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 23:16:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 23:16:34,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-05-02 23:16:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,299 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 23:16:34,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 23:16:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:16:34,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,299 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:34,299 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash 615486527, now seen corresponding path program 8 times [2021-05-02 23:16:34,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080012631] [2021-05-02 23:16:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,303 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,304 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,386 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 23:16:34,386 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080012631] [2021-05-02 23:16:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080012631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:34,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121728234] [2021-05-02 23:16:34,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:34,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:34,388 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,454 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2021-05-02 23:16:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 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 36 [2021-05-02 23:16:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,455 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:16:34,455 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 23:16:34,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 23:16:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2021-05-02 23:16:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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 23:16:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 23:16:34,459 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-05-02 23:16:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,459 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 23:16:34,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 23:16:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:16:34,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,460 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:34,460 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1309687649, now seen corresponding path program 9 times [2021-05-02 23:16:34,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078874603] [2021-05-02 23:16:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,464 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,464 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,552 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 23:16:34,552 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078874603] [2021-05-02 23:16:34,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078874603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:34,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805331994] [2021-05-02 23:16:34,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:34,553 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,650 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-02 23:16:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:34,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 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 38 [2021-05-02 23:16:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,651 INFO L225 Difference]: With dead ends: 89 [2021-05-02 23:16:34,651 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:16:34,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:16:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2021-05-02 23:16:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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 23:16:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 23:16:34,658 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-05-02 23:16:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,658 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 23:16:34,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 23:16:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:16:34,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,660 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:34,660 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1577932285, now seen corresponding path program 10 times [2021-05-02 23:16:34,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938636497] [2021-05-02 23:16:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,667 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,779 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 23:16:34,780 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938636497] [2021-05-02 23:16:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938636497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:34,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522165111] [2021-05-02 23:16:34,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:34,781 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,864 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-05-02 23:16:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 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 40 [2021-05-02 23:16:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,866 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:16:34,866 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:16:34,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:16:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-05-02 23:16:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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 23:16:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 23:16:34,874 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-05-02 23:16:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,874 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 23:16:34,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 23:16:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:34,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,877 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:34,877 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2031815643, now seen corresponding path program 11 times [2021-05-02 23:16:34,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294083535] [2021-05-02 23:16:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,883 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,024 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 23:16:35,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294083535] [2021-05-02 23:16:35,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [294083535] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:35,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711764637] [2021-05-02 23:16:35,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:35,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:35,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:35,025 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,107 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-05-02 23:16:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:35,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 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 42 [2021-05-02 23:16:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,108 INFO L225 Difference]: With dead ends: 101 [2021-05-02 23:16:35,108 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:16:35,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:16:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 45. [2021-05-02 23:16:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 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 23:16:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 23:16:35,114 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-05-02 23:16:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,114 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 23:16:35,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 23:16:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:16:35,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,115 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:35,115 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash -127058489, now seen corresponding path program 12 times [2021-05-02 23:16:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604637786] [2021-05-02 23:16:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,121 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,122 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,275 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 23:16:35,275 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604637786] [2021-05-02 23:16:35,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1604637786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:35,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957429422] [2021-05-02 23:16:35,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:35,277 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,374 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-05-02 23:16:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 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 44 [2021-05-02 23:16:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,375 INFO L225 Difference]: With dead ends: 107 [2021-05-02 23:16:35,376 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 23:16:35,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 23:16:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2021-05-02 23:16:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 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 23:16:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-02 23:16:35,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-05-02 23:16:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,383 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-02 23:16:35,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-02 23:16:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:35,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,384 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:35,384 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash 688498409, now seen corresponding path program 13 times [2021-05-02 23:16:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207818289] [2021-05-02 23:16:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,389 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,390 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,522 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 23:16:35,522 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207818289] [2021-05-02 23:16:35,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207818289] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:35,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916476503] [2021-05-02 23:16:35,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:35,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:35,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:35,524 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,613 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2021-05-02 23:16:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 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 46 [2021-05-02 23:16:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,614 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:16:35,614 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 23:16:35,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 23:16:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2021-05-02 23:16:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 23:16:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-05-02 23:16:35,618 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-05-02 23:16:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,618 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-05-02 23:16:35,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-05-02 23:16:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:16:35,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,619 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:35,619 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1540337781, now seen corresponding path program 14 times [2021-05-02 23:16:35,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384701480] [2021-05-02 23:16:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,623 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,780 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 23:16:35,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384701480] [2021-05-02 23:16:35,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384701480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:35,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355951341] [2021-05-02 23:16:35,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:35,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:35,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:35,783 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,905 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-05-02 23:16:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:35,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 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 48 [2021-05-02 23:16:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,906 INFO L225 Difference]: With dead ends: 119 [2021-05-02 23:16:35,906 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:16:35,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:16:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2021-05-02 23:16:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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 23:16:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-05-02 23:16:35,911 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2021-05-02 23:16:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,912 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-05-02 23:16:35,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-05-02 23:16:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:35,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,912 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:35,912 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash -263235667, now seen corresponding path program 15 times [2021-05-02 23:16:35,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219254576] [2021-05-02 23:16:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,917 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,918 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,065 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 23:16:36,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219254576] [2021-05-02 23:16:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [219254576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006842266] [2021-05-02 23:16:36,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:36,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:36,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:36,066 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,170 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-05-02 23:16:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 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 50 [2021-05-02 23:16:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,171 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:16:36,171 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:16:36,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:16:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2021-05-02 23:16:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 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 23:16:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 23:16:36,176 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2021-05-02 23:16:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,177 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 23:16:36,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 23:16:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:16:36,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,177 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:36,177 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1328750769, now seen corresponding path program 16 times [2021-05-02 23:16:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27517521] [2021-05-02 23:16:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,186 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,186 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,361 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 23:16:36,361 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27517521] [2021-05-02 23:16:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [27517521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:36,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656185613] [2021-05-02 23:16:36,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:36,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:36,363 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,470 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-05-02 23:16:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:36,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 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 52 [2021-05-02 23:16:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,471 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:16:36,471 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:16:36,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:16:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2021-05-02 23:16:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 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 23:16:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-05-02 23:16:36,477 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2021-05-02 23:16:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,477 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-05-02 23:16:36,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-05-02 23:16:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:36,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,477 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:36,478 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1208419953, now seen corresponding path program 17 times [2021-05-02 23:16:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888843848] [2021-05-02 23:16:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,481 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,482 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,682 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 23:16:36,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888843848] [2021-05-02 23:16:36,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888843848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:36,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487870658] [2021-05-02 23:16:36,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:36,684 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,806 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-05-02 23:16:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 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 54 [2021-05-02 23:16:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,807 INFO L225 Difference]: With dead ends: 137 [2021-05-02 23:16:36,807 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:16:36,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:16:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 57. [2021-05-02 23:16:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 23:16:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-05-02 23:16:36,811 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2021-05-02 23:16:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,812 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-05-02 23:16:36,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-05-02 23:16:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:16:36,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,812 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:36,812 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -111940333, now seen corresponding path program 18 times [2021-05-02 23:16:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647159034] [2021-05-02 23:16:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,816 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,817 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,048 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 23:16:37,048 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647159034] [2021-05-02 23:16:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647159034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:37,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357231640] [2021-05-02 23:16:37,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:37,049 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,184 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-05-02 23:16:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 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 56 [2021-05-02 23:16:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,185 INFO L225 Difference]: With dead ends: 143 [2021-05-02 23:16:37,185 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:16:37,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:16:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2021-05-02 23:16:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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 23:16:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-02 23:16:37,189 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-05-02 23:16:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,189 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-02 23:16:37,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-02 23:16:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:16:37,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,190 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:37,190 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1962822859, now seen corresponding path program 19 times [2021-05-02 23:16:37,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052082188] [2021-05-02 23:16:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,194 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,195 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,390 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 23:16:37,390 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052082188] [2021-05-02 23:16:37,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052082188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178474875] [2021-05-02 23:16:37,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:37,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:37,391 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,531 INFO L93 Difference]: Finished difference Result 149 states and 169 transitions. [2021-05-02 23:16:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 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 58 [2021-05-02 23:16:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,533 INFO L225 Difference]: With dead ends: 149 [2021-05-02 23:16:37,533 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:16:37,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:16:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2021-05-02 23:16:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 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 23:16:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 23:16:37,539 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2021-05-02 23:16:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,539 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 23:16:37,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 23:16:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:37,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,540 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:37,540 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1750497495, now seen corresponding path program 20 times [2021-05-02 23:16:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369305332] [2021-05-02 23:16:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,545 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,546 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,793 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 23:16:37,793 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369305332] [2021-05-02 23:16:37,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369305332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:37,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642264788] [2021-05-02 23:16:37,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:37,794 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,948 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2021-05-02 23:16:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 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 60 [2021-05-02 23:16:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,949 INFO L225 Difference]: With dead ends: 155 [2021-05-02 23:16:37,949 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 23:16:37,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 23:16:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2021-05-02 23:16:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 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 23:16:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-05-02 23:16:37,953 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2021-05-02 23:16:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,953 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-05-02 23:16:37,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-05-02 23:16:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:37,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,954 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:37,954 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1133534713, now seen corresponding path program 21 times [2021-05-02 23:16:37,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268997435] [2021-05-02 23:16:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,958 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,959 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,202 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 23:16:38,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268997435] [2021-05-02 23:16:38,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [268997435] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:38,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689339187] [2021-05-02 23:16:38,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:38,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:38,203 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,370 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-05-02 23:16:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 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 62 [2021-05-02 23:16:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,371 INFO L225 Difference]: With dead ends: 161 [2021-05-02 23:16:38,372 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 23:16:38,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 23:16:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 65. [2021-05-02 23:16:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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 23:16:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-02 23:16:38,382 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-05-02 23:16:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-02 23:16:38,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-02 23:16:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:16:38,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,384 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:38,384 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash 937788059, now seen corresponding path program 22 times [2021-05-02 23:16:38,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448188238] [2021-05-02 23:16:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,389 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,390 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,673 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 23:16:38,674 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448188238] [2021-05-02 23:16:38,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [448188238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:38,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838950007] [2021-05-02 23:16:38,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:38,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:38,675 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,851 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2021-05-02 23:16:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 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 64 [2021-05-02 23:16:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,853 INFO L225 Difference]: With dead ends: 167 [2021-05-02 23:16:38,853 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:16:38,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:16:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 67. [2021-05-02 23:16:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 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 23:16:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-05-02 23:16:38,859 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-05-02 23:16:38,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,859 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-05-02 23:16:38,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-05-02 23:16:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:38,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,859 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:38,860 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1803814589, now seen corresponding path program 23 times [2021-05-02 23:16:38,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050224193] [2021-05-02 23:16:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,864 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,865 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,135 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 23:16:39,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050224193] [2021-05-02 23:16:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050224193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:39,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892066866] [2021-05-02 23:16:39,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:39,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:39,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:39,136 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,304 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2021-05-02 23:16:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:39,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 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 66 [2021-05-02 23:16:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,305 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:16:39,305 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:16:39,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:16:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 69. [2021-05-02 23:16:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 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 23:16:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 23:16:39,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-05-02 23:16:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,311 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 23:16:39,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 23:16:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:16:39,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,311 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:39,311 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash 831654495, now seen corresponding path program 24 times [2021-05-02 23:16:39,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501058543] [2021-05-02 23:16:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,315 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,316 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,608 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 23:16:39,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501058543] [2021-05-02 23:16:39,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [501058543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:39,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907286075] [2021-05-02 23:16:39,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:39,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:39,610 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,785 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2021-05-02 23:16:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 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 68 [2021-05-02 23:16:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,786 INFO L225 Difference]: With dead ends: 179 [2021-05-02 23:16:39,786 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:16:39,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:16:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2021-05-02 23:16:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 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 23:16:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:16:39,791 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-05-02 23:16:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,791 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:16:39,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:16:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:39,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,791 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:39,792 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1406292607, now seen corresponding path program 25 times [2021-05-02 23:16:39,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11528959] [2021-05-02 23:16:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,798 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,798 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,080 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 23:16:40,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11528959] [2021-05-02 23:16:40,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [11528959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:40,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389616444] [2021-05-02 23:16:40,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:40,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:40,081 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,256 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2021-05-02 23:16:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 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 70 [2021-05-02 23:16:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,257 INFO L225 Difference]: With dead ends: 185 [2021-05-02 23:16:40,257 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:16:40,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:16:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 73. [2021-05-02 23:16:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 23:16:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-05-02 23:16:40,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-05-02 23:16:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,265 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-05-02 23:16:40,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-05-02 23:16:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:40,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,265 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:40,265 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,266 INFO L82 PathProgramCache]: Analyzing trace with hash -294842333, now seen corresponding path program 26 times [2021-05-02 23:16:40,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224081620] [2021-05-02 23:16:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,269 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,270 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,616 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 23:16:40,616 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224081620] [2021-05-02 23:16:40,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [224081620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083835269] [2021-05-02 23:16:40,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:40,617 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,814 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2021-05-02 23:16:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 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 72 [2021-05-02 23:16:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,815 INFO L225 Difference]: With dead ends: 191 [2021-05-02 23:16:40,815 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:16:40,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:16:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 75. [2021-05-02 23:16:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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 23:16:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-05-02 23:16:40,821 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2021-05-02 23:16:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,821 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-05-02 23:16:40,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-05-02 23:16:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:40,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,822 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:40,822 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1637985723, now seen corresponding path program 27 times [2021-05-02 23:16:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110715326] [2021-05-02 23:16:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,826 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,196 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 23:16:41,196 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110715326] [2021-05-02 23:16:41,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [110715326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:41,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626311721] [2021-05-02 23:16:41,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:41,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:41,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:41,197 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,404 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2021-05-02 23:16:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 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 74 [2021-05-02 23:16:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,405 INFO L225 Difference]: With dead ends: 197 [2021-05-02 23:16:41,405 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:16:41,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:16:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 77. [2021-05-02 23:16:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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 23:16:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 23:16:41,411 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-05-02 23:16:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,411 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 23:16:41,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 23:16:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:16:41,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,412 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:41,412 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 386372583, now seen corresponding path program 28 times [2021-05-02 23:16:41,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796091988] [2021-05-02 23:16:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:41,416 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:41,417 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,793 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 23:16:41,793 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796091988] [2021-05-02 23:16:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [796091988] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145134534] [2021-05-02 23:16:41,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:41,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:41,794 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,993 INFO L93 Difference]: Finished difference Result 203 states and 232 transitions. [2021-05-02 23:16:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:41,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 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 76 [2021-05-02 23:16:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,994 INFO L225 Difference]: With dead ends: 203 [2021-05-02 23:16:41,994 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:16:41,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:16:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 79. [2021-05-02 23:16:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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 23:16:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-05-02 23:16:41,999 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2021-05-02 23:16:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,999 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-05-02 23:16:41,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-05-02 23:16:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:42,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,000 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:42,000 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash 174519561, now seen corresponding path program 29 times [2021-05-02 23:16:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030057509] [2021-05-02 23:16:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,004 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,005 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,393 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 23:16:42,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030057509] [2021-05-02 23:16:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030057509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494934758] [2021-05-02 23:16:42,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:42,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:42,394 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,613 INFO L93 Difference]: Finished difference Result 209 states and 239 transitions. [2021-05-02 23:16:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 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 78 [2021-05-02 23:16:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,614 INFO L225 Difference]: With dead ends: 209 [2021-05-02 23:16:42,614 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 23:16:42,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 23:16:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 81. [2021-05-02 23:16:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 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 23:16:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-05-02 23:16:42,621 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2021-05-02 23:16:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,621 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-05-02 23:16:42,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-05-02 23:16:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:16:42,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,621 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:42,622 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1552771669, now seen corresponding path program 30 times [2021-05-02 23:16:42,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062972395] [2021-05-02 23:16:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,625 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,626 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,045 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 23:16:43,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062972395] [2021-05-02 23:16:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062972395] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472194362] [2021-05-02 23:16:43,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:43,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:43,047 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,260 INFO L93 Difference]: Finished difference Result 215 states and 246 transitions. [2021-05-02 23:16:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 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 80 [2021-05-02 23:16:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,261 INFO L225 Difference]: With dead ends: 215 [2021-05-02 23:16:43,261 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 23:16:43,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 23:16:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 83. [2021-05-02 23:16:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 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 23:16:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-02 23:16:43,267 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-05-02 23:16:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,267 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-02 23:16:43,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-02 23:16:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:16:43,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,268 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:43,268 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,268 INFO L82 PathProgramCache]: Analyzing trace with hash 672699853, now seen corresponding path program 31 times [2021-05-02 23:16:43,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492685609] [2021-05-02 23:16:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,272 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,693 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 23:16:43,693 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492685609] [2021-05-02 23:16:43,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492685609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:43,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626922210] [2021-05-02 23:16:43,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:43,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:43,694 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,933 INFO L93 Difference]: Finished difference Result 221 states and 253 transitions. [2021-05-02 23:16:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 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 82 [2021-05-02 23:16:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,935 INFO L225 Difference]: With dead ends: 221 [2021-05-02 23:16:43,935 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 23:16:43,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 23:16:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 85. [2021-05-02 23:16:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 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 23:16:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 23:16:43,941 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2021-05-02 23:16:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,941 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 23:16:43,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 23:16:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:16:43,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,942 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:43,942 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,942 INFO L82 PathProgramCache]: Analyzing trace with hash 457119087, now seen corresponding path program 32 times [2021-05-02 23:16:43,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089723894] [2021-05-02 23:16:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,946 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,947 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:44,384 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 23:16:44,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089723894] [2021-05-02 23:16:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089723894] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:44,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:44,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:44,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412063243] [2021-05-02 23:16:44,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:44,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:44,386 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,648 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2021-05-02 23:16:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 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 84 [2021-05-02 23:16:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,650 INFO L225 Difference]: With dead ends: 227 [2021-05-02 23:16:44,650 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 23:16:44,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 23:16:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 87. [2021-05-02 23:16:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 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 23:16:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-05-02 23:16:44,656 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2021-05-02 23:16:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,656 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-05-02 23:16:44,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-05-02 23:16:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:16:44,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,657 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:44,657 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash -557566831, now seen corresponding path program 33 times [2021-05-02 23:16:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588822369] [2021-05-02 23:16:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,671 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,671 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,149 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 23:16:45,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588822369] [2021-05-02 23:16:45,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [588822369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181117789] [2021-05-02 23:16:45,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:45,152 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,418 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2021-05-02 23:16:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:45,418 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 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 86 [2021-05-02 23:16:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,427 INFO L225 Difference]: With dead ends: 233 [2021-05-02 23:16:45,427 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:16:45,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:16:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2021-05-02 23:16:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 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 23:16:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-02 23:16:45,435 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-05-02 23:16:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,435 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-02 23:16:45,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-02 23:16:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:16:45,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,435 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:45,435 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash -713157837, now seen corresponding path program 34 times [2021-05-02 23:16:45,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687438660] [2021-05-02 23:16:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,439 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,440 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,973 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 23:16:45,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687438660] [2021-05-02 23:16:45,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687438660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963963782] [2021-05-02 23:16:45,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:45,974 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:46,250 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2021-05-02 23:16:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 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 88 [2021-05-02 23:16:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:46,251 INFO L225 Difference]: With dead ends: 239 [2021-05-02 23:16:46,251 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 23:16:46,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 23:16:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 91. [2021-05-02 23:16:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 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 23:16:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-05-02 23:16:46,259 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2021-05-02 23:16:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:46,259 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-05-02 23:16:46,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-05-02 23:16:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:16:46,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:46,259 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:46,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:46,260 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash 87740757, now seen corresponding path program 35 times [2021-05-02 23:16:46,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:46,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034837804] [2021-05-02 23:16:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:46,264 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:46,265 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,789 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 23:16:46,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034837804] [2021-05-02 23:16:46,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034837804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:46,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420347752] [2021-05-02 23:16:46,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:46,791 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,064 INFO L93 Difference]: Finished difference Result 245 states and 281 transitions. [2021-05-02 23:16:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 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 90 [2021-05-02 23:16:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,066 INFO L225 Difference]: With dead ends: 245 [2021-05-02 23:16:47,066 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 23:16:47,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 23:16:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 93. [2021-05-02 23:16:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 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 23:16:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 23:16:47,076 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2021-05-02 23:16:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,076 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 23:16:47,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 38 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 23:16:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:16:47,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,076 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:47,077 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 952143607, now seen corresponding path program 36 times [2021-05-02 23:16:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118200318] [2021-05-02 23:16:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,081 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,081 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:47,650 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 23:16:47,650 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:47,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118200318] [2021-05-02 23:16:47,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118200318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:47,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:47,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376826325] [2021-05-02 23:16:47,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:47,651 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,943 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2021-05-02 23:16:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:47,943 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 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 92 [2021-05-02 23:16:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,944 INFO L225 Difference]: With dead ends: 251 [2021-05-02 23:16:47,944 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 23:16:47,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 23:16:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 95. [2021-05-02 23:16:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 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 23:16:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-02 23:16:47,953 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2021-05-02 23:16:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,953 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-02 23:16:47,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-02 23:16:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:16:47,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,954 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:47,954 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1580372967, now seen corresponding path program 37 times [2021-05-02 23:16:47,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456326806] [2021-05-02 23:16:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,959 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,960 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,566 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 23:16:48,566 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456326806] [2021-05-02 23:16:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456326806] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707463665] [2021-05-02 23:16:48,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:48,568 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,829 INFO L93 Difference]: Finished difference Result 257 states and 295 transitions. [2021-05-02 23:16:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 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 94 [2021-05-02 23:16:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,830 INFO L225 Difference]: With dead ends: 257 [2021-05-02 23:16:48,830 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 23:16:48,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 23:16:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 97. [2021-05-02 23:16:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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 23:16:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-05-02 23:16:48,839 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-05-02 23:16:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,839 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-05-02 23:16:48,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.097560975609756) internal successors, (86), 40 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-05-02 23:16:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:16:48,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,840 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:48,840 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash -82343749, now seen corresponding path program 38 times [2021-05-02 23:16:48,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450205003] [2021-05-02 23:16:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,844 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,448 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 23:16:49,448 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:49,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450205003] [2021-05-02 23:16:49,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [450205003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:49,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:49,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:49,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311376751] [2021-05-02 23:16:49,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:49,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:49,449 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:49,701 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2021-05-02 23:16:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:49,701 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 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 96 [2021-05-02 23:16:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:49,702 INFO L225 Difference]: With dead ends: 263 [2021-05-02 23:16:49,702 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 23:16:49,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 23:16:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 99. [2021-05-02 23:16:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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 23:16:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-05-02 23:16:49,711 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-05-02 23:16:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:49,711 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-05-02 23:16:49,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-05-02 23:16:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:16:49,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:49,712 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:49,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:49,712 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash 709690589, now seen corresponding path program 39 times [2021-05-02 23:16:49,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:49,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176019288] [2021-05-02 23:16:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:49,717 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:49,718 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,359 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 23:16:50,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:50,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176019288] [2021-05-02 23:16:50,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [176019288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:50,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:50,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765865996] [2021-05-02 23:16:50,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:50,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:50,361 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,614 INFO L93 Difference]: Finished difference Result 269 states and 309 transitions. [2021-05-02 23:16:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 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 98 [2021-05-02 23:16:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,615 INFO L225 Difference]: With dead ends: 269 [2021-05-02 23:16:50,615 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 23:16:50,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 23:16:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 101. [2021-05-02 23:16:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 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 23:16:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 23:16:50,624 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-05-02 23:16:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:50,624 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 23:16:50,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 42 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 23:16:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:16:50,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:50,625 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:50,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:50,625 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1645478015, now seen corresponding path program 40 times [2021-05-02 23:16:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055309077] [2021-05-02 23:16:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:50,629 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:50,630 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,289 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 23:16:51,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055309077] [2021-05-02 23:16:51,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055309077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:51,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891574202] [2021-05-02 23:16:51,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:51,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:51,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:51,291 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:51,562 INFO L93 Difference]: Finished difference Result 275 states and 316 transitions. [2021-05-02 23:16:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 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 100 [2021-05-02 23:16:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:51,563 INFO L225 Difference]: With dead ends: 275 [2021-05-02 23:16:51,563 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 23:16:51,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 23:16:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 103. [2021-05-02 23:16:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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 23:16:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-05-02 23:16:51,572 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-05-02 23:16:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,572 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-05-02 23:16:51,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-05-02 23:16:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:51,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,573 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:51,573 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1005937759, now seen corresponding path program 41 times [2021-05-02 23:16:51,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128958504] [2021-05-02 23:16:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,578 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,248 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 23:16:52,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:52,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128958504] [2021-05-02 23:16:52,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128958504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:52,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:52,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:52,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697747238] [2021-05-02 23:16:52,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:52,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:52,249 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:52,574 INFO L93 Difference]: Finished difference Result 281 states and 323 transitions. [2021-05-02 23:16:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 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 102 [2021-05-02 23:16:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:52,576 INFO L225 Difference]: With dead ends: 281 [2021-05-02 23:16:52,576 INFO L226 Difference]: Without dead ends: 267 [2021-05-02 23:16:52,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-02 23:16:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 105. [2021-05-02 23:16:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 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 23:16:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-05-02 23:16:52,585 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-05-02 23:16:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:52,585 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-05-02 23:16:52,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-05-02 23:16:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:16:52,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:52,586 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:52,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:52,586 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2100890045, now seen corresponding path program 42 times [2021-05-02 23:16:52,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:52,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416824782] [2021-05-02 23:16:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:52,592 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:52,593 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,294 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 23:16:53,294 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:53,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416824782] [2021-05-02 23:16:53,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416824782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:53,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:53,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396803217] [2021-05-02 23:16:53,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:53,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:53,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:53,296 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:53,634 INFO L93 Difference]: Finished difference Result 287 states and 330 transitions. [2021-05-02 23:16:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 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 104 [2021-05-02 23:16:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:53,635 INFO L225 Difference]: With dead ends: 287 [2021-05-02 23:16:53,635 INFO L226 Difference]: Without dead ends: 273 [2021-05-02 23:16:53,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-02 23:16:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 107. [2021-05-02 23:16:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 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 23:16:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-02 23:16:53,645 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2021-05-02 23:16:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:53,645 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-02 23:16:53,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-02 23:16:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:16:53,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:53,646 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:53,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:53,646 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2083049371, now seen corresponding path program 43 times [2021-05-02 23:16:53,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:53,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513644963] [2021-05-02 23:16:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:53,653 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:53,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,413 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 23:16:54,413 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513644963] [2021-05-02 23:16:54,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513644963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:54,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:54,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331479958] [2021-05-02 23:16:54,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:54,414 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:54,772 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2021-05-02 23:16:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 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 106 [2021-05-02 23:16:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:54,773 INFO L225 Difference]: With dead ends: 293 [2021-05-02 23:16:54,773 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 23:16:54,774 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 23:16:54,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-05-02 23:16:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 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 23:16:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 23:16:54,784 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2021-05-02 23:16:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:54,784 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 23:16:54,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 46 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 23:16:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:16:54,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:54,784 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:54,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:54,785 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2118030841, now seen corresponding path program 44 times [2021-05-02 23:16:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:54,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113882296] [2021-05-02 23:16:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:54,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:54,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:55,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:55,562 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 23:16:55,562 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:55,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113882296] [2021-05-02 23:16:55,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [113882296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:55,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:55,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:55,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677742037] [2021-05-02 23:16:55,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:55,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:55,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:55,563 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:55,869 INFO L93 Difference]: Finished difference Result 299 states and 344 transitions. [2021-05-02 23:16:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 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 108 [2021-05-02 23:16:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:55,871 INFO L225 Difference]: With dead ends: 299 [2021-05-02 23:16:55,871 INFO L226 Difference]: Without dead ends: 285 [2021-05-02 23:16:55,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-02 23:16:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 111. [2021-05-02 23:16:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 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 23:16:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-05-02 23:16:55,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2021-05-02 23:16:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:55,882 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-05-02 23:16:55,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-05-02 23:16:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:16:55,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:55,882 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:55,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:55,882 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:55,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:55,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1375485143, now seen corresponding path program 45 times [2021-05-02 23:16:55,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:55,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276517255] [2021-05-02 23:16:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:55,889 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:55,889 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,705 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 23:16:56,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276517255] [2021-05-02 23:16:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [276517255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:56,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374279869] [2021-05-02 23:16:56,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:56,706 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:57,066 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2021-05-02 23:16:57,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:57,067 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 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 110 [2021-05-02 23:16:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:57,068 INFO L225 Difference]: With dead ends: 305 [2021-05-02 23:16:57,068 INFO L226 Difference]: Without dead ends: 291 [2021-05-02 23:16:57,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 765.2ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-02 23:16:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 113. [2021-05-02 23:16:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 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 23:16:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-05-02 23:16:57,079 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-05-02 23:16:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:57,079 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-05-02 23:16:57,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 48 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-05-02 23:16:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 23:16:57,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:57,080 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:57,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:57,080 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash -753640501, now seen corresponding path program 46 times [2021-05-02 23:16:57,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:57,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132595182] [2021-05-02 23:16:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:57,086 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:57,087 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:57,926 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 23:16:57,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:57,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132595182] [2021-05-02 23:16:57,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2132595182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:57,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:57,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:57,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860019801] [2021-05-02 23:16:57,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:57,928 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:58,300 INFO L93 Difference]: Finished difference Result 311 states and 358 transitions. [2021-05-02 23:16:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 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 112 [2021-05-02 23:16:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:58,301 INFO L225 Difference]: With dead ends: 311 [2021-05-02 23:16:58,301 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 23:16:58,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 23:16:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 115. [2021-05-02 23:16:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 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 23:16:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2021-05-02 23:16:58,313 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2021-05-02 23:16:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:58,313 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2021-05-02 23:16:58,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2021-05-02 23:16:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:16:58,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:58,314 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:58,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:58,314 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash -161393683, now seen corresponding path program 47 times [2021-05-02 23:16:58,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:58,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335347414] [2021-05-02 23:16:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:58,317 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:58,318 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:59,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:59,180 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 23:16:59,180 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335347414] [2021-05-02 23:16:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1335347414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:59,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:59,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900879109] [2021-05-02 23:16:59,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:59,182 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:59,615 INFO L93 Difference]: Finished difference Result 317 states and 365 transitions. [2021-05-02 23:16:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 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 114 [2021-05-02 23:16:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:59,617 INFO L225 Difference]: With dead ends: 317 [2021-05-02 23:16:59,617 INFO L226 Difference]: Without dead ends: 303 [2021-05-02 23:16:59,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-02 23:16:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 117. [2021-05-02 23:16:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 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 23:16:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 23:16:59,629 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2021-05-02 23:16:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,630 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 23:16:59,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 23:16:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 23:16:59,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,630 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:59,630 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2052115343, now seen corresponding path program 48 times [2021-05-02 23:16:59,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936859941] [2021-05-02 23:16:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,634 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,634 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,553 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 23:17:00,553 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:00,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936859941] [2021-05-02 23:17:00,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [936859941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:00,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:00,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:17:00,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25933403] [2021-05-02 23:17:00,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:17:00,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:00,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:17:00,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:17:00,554 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,902 INFO L93 Difference]: Finished difference Result 323 states and 372 transitions. [2021-05-02 23:17:00,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:17:00,902 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 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 116 [2021-05-02 23:17:00,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:00,903 INFO L225 Difference]: With dead ends: 323 [2021-05-02 23:17:00,903 INFO L226 Difference]: Without dead ends: 309 [2021-05-02 23:17:00,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:17:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-02 23:17:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 119. [2021-05-02 23:17:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 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 23:17:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-05-02 23:17:00,916 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2021-05-02 23:17:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:00,917 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-05-02 23:17:00,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-05-02 23:17:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:17:00,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:00,917 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:00,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:17:00,917 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1069489487, now seen corresponding path program 49 times [2021-05-02 23:17:00,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:00,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181261690] [2021-05-02 23:17:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:00,921 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:00,921 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,857 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 23:17:01,857 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:01,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181261690] [2021-05-02 23:17:01,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181261690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:01,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:01,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:17:01,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306830143] [2021-05-02 23:17:01,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:17:01,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:17:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:17:01,859 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:02,279 INFO L93 Difference]: Finished difference Result 329 states and 379 transitions. [2021-05-02 23:17:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:17:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 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 118 [2021-05-02 23:17:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:02,281 INFO L225 Difference]: With dead ends: 329 [2021-05-02 23:17:02,281 INFO L226 Difference]: Without dead ends: 315 [2021-05-02 23:17:02,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:17:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-02 23:17:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 121. [2021-05-02 23:17:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 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 23:17:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-05-02 23:17:02,294 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2021-05-02 23:17:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:02,294 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-05-02 23:17:02,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-05-02 23:17:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:17:02,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:02,295 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:02,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:17:02,295 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1250408787, now seen corresponding path program 50 times [2021-05-02 23:17:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:02,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939965263] [2021-05-02 23:17:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:02,298 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:02,299 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:03,261 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 23:17:03,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:03,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939965263] [2021-05-02 23:17:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939965263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:03,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:03,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:17:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196594733] [2021-05-02 23:17:03,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:17:03,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:17:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:17:03,262 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:03,723 INFO L93 Difference]: Finished difference Result 335 states and 386 transitions. [2021-05-02 23:17:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:17:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 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 120 [2021-05-02 23:17:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:03,725 INFO L225 Difference]: With dead ends: 335 [2021-05-02 23:17:03,725 INFO L226 Difference]: Without dead ends: 321 [2021-05-02 23:17:03,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 917.0ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:17:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-02 23:17:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 123. [2021-05-02 23:17:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 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 23:17:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-05-02 23:17:03,738 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2021-05-02 23:17:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:03,739 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-05-02 23:17:03,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-05-02 23:17:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:17:03,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:03,739 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:03,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:17:03,739 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1584623477, now seen corresponding path program 51 times [2021-05-02 23:17:03,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:03,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458430085] [2021-05-02 23:17:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:03,742 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:03,743 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,744 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 23:17:04,744 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458430085] [2021-05-02 23:17:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [458430085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:04,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:04,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:17:04,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483207243] [2021-05-02 23:17:04,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:17:04,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:17:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:17:04,746 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:05,175 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2021-05-02 23:17:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:17:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 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 122 [2021-05-02 23:17:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:05,177 INFO L225 Difference]: With dead ends: 341 [2021-05-02 23:17:05,177 INFO L226 Difference]: Without dead ends: 327 [2021-05-02 23:17:05,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:17:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-02 23:17:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 125. [2021-05-02 23:17:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 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 23:17:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 23:17:05,191 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2021-05-02 23:17:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:05,191 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 23:17:05,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 54 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,191 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 23:17:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:17:05,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:05,192 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:05,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:17:05,192 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:05,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:05,192 INFO L82 PathProgramCache]: Analyzing trace with hash 642393367, now seen corresponding path program 52 times [2021-05-02 23:17:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:05,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825203970] [2021-05-02 23:17:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:05,206 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:05,207 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,253 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 23:17:06,253 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825203970] [2021-05-02 23:17:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825203970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:17:06,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344566438] [2021-05-02 23:17:06,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:17:06,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:17:06,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:17:06,255 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,657 INFO L93 Difference]: Finished difference Result 347 states and 400 transitions. [2021-05-02 23:17:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:17:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 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 124 [2021-05-02 23:17:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,660 INFO L225 Difference]: With dead ends: 347 [2021-05-02 23:17:06,661 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 23:17:06,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 996.8ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:17:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 23:17:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 127. [2021-05-02 23:17:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 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 23:17:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2021-05-02 23:17:06,675 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2021-05-02 23:17:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,676 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2021-05-02 23:17:06,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2021-05-02 23:17:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:17:06,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,676 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:17:06,676 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1397357113, now seen corresponding path program 53 times [2021-05-02 23:17:06,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313572046] [2021-05-02 23:17:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,681 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:06,682 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:07,802 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 23:17:07,803 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:07,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313572046] [2021-05-02 23:17:07,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [313572046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:07,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:07,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:17:07,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147635913] [2021-05-02 23:17:07,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:17:07,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:17:07,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:17:07,804 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:08,196 INFO L93 Difference]: Finished difference Result 353 states and 407 transitions. [2021-05-02 23:17:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:17:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 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 126 [2021-05-02 23:17:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:08,198 INFO L225 Difference]: With dead ends: 353 [2021-05-02 23:17:08,198 INFO L226 Difference]: Without dead ends: 339 [2021-05-02 23:17:08,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:17:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-02 23:17:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 129. [2021-05-02 23:17:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 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 23:17:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-05-02 23:17:08,222 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2021-05-02 23:17:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,222 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-05-02 23:17:08,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 56 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-05-02 23:17:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 23:17:08,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,225 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:17:08,225 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1068043995, now seen corresponding path program 54 times [2021-05-02 23:17:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433120287] [2021-05-02 23:17:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,243 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:08,244 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,385 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 23:17:09,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:09,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433120287] [2021-05-02 23:17:09,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [433120287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:09,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:09,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:17:09,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508281781] [2021-05-02 23:17:09,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:17:09,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:09,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:17:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:17:09,387 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:09,783 INFO L93 Difference]: Finished difference Result 359 states and 414 transitions. [2021-05-02 23:17:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:17:09,783 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 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 128 [2021-05-02 23:17:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:09,784 INFO L225 Difference]: With dead ends: 359 [2021-05-02 23:17:09,784 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 23:17:09,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1079.0ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:17:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 23:17:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 131. [2021-05-02 23:17:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 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 23:17:09,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-05-02 23:17:09,800 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2021-05-02 23:17:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:09,800 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-05-02 23:17:09,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-05-02 23:17:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:17:09,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:09,801 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:09,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:17:09,801 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:09,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1869249795, now seen corresponding path program 55 times [2021-05-02 23:17:09,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:09,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262306433] [2021-05-02 23:17:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:09,804 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:09,805 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,991 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 23:17:10,991 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262306433] [2021-05-02 23:17:10,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262306433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:17:10,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808163819] [2021-05-02 23:17:10,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:17:10,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:17:10,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:10,992 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,465 INFO L93 Difference]: Finished difference Result 365 states and 421 transitions. [2021-05-02 23:17:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:17:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 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 130 [2021-05-02 23:17:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,470 INFO L225 Difference]: With dead ends: 365 [2021-05-02 23:17:11,470 INFO L226 Difference]: Without dead ends: 351 [2021-05-02 23:17:11,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1134.2ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:17:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-02 23:17:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 133. [2021-05-02 23:17:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 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 23:17:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 23:17:11,487 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2021-05-02 23:17:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,487 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 23:17:11,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 58 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 23:17:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 23:17:11,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,488 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:17:11,488 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1479898783, now seen corresponding path program 56 times [2021-05-02 23:17:11,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330500693] [2021-05-02 23:17:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,491 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,492 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,682 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 23:17:12,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:12,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330500693] [2021-05-02 23:17:12,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330500693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:12,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:12,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:17:12,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656899906] [2021-05-02 23:17:12,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:17:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:17:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:12,683 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,195 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2021-05-02 23:17:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:17:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 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 132 [2021-05-02 23:17:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,196 INFO L225 Difference]: With dead ends: 371 [2021-05-02 23:17:13,197 INFO L226 Difference]: Without dead ends: 357 [2021-05-02 23:17:13,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:17:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-02 23:17:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 135. [2021-05-02 23:17:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 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 23:17:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-05-02 23:17:13,214 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2021-05-02 23:17:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:13,214 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-05-02 23:17:13,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-05-02 23:17:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:17:13,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:13,214 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:13,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:17:13,215 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1213789759, now seen corresponding path program 57 times [2021-05-02 23:17:13,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:13,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664630949] [2021-05-02 23:17:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:13,218 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:13,218 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:14,450 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 23:17:14,450 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:14,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664630949] [2021-05-02 23:17:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664630949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:14,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:14,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:17:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366106037] [2021-05-02 23:17:14,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:17:14,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:17:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:14,452 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:14,901 INFO L93 Difference]: Finished difference Result 377 states and 435 transitions. [2021-05-02 23:17:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:17:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 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 134 [2021-05-02 23:17:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:14,903 INFO L225 Difference]: With dead ends: 377 [2021-05-02 23:17:14,903 INFO L226 Difference]: Without dead ends: 363 [2021-05-02 23:17:14,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1181.5ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:17:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-02 23:17:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2021-05-02 23:17:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 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 23:17:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-05-02 23:17:14,921 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-05-02 23:17:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:14,921 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-05-02 23:17:14,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 60 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-05-02 23:17:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 23:17:14,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:14,921 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:14,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:17:14,922 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 16800867, now seen corresponding path program 58 times [2021-05-02 23:17:14,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:14,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832884245] [2021-05-02 23:17:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:14,925 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:14,926 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:16,202 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 23:17:16,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:16,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832884245] [2021-05-02 23:17:16,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832884245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:16,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:16,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:17:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543734683] [2021-05-02 23:17:16,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:17:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:17:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:16,204 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:16,763 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2021-05-02 23:17:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:17:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 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 136 [2021-05-02 23:17:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:16,764 INFO L225 Difference]: With dead ends: 383 [2021-05-02 23:17:16,764 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 23:17:16,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1228.2ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:17:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 23:17:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 139. [2021-05-02 23:17:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 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 23:17:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-05-02 23:17:16,783 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2021-05-02 23:17:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:16,783 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-05-02 23:17:16,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-05-02 23:17:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:17:16,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:16,784 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:16,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:17:16,784 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:16,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1498386053, now seen corresponding path program 59 times [2021-05-02 23:17:16,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:16,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681035140] [2021-05-02 23:17:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:16,787 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:16,788 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:18,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:18,112 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 23:17:18,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:18,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681035140] [2021-05-02 23:17:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681035140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:18,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:17:18,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067715788] [2021-05-02 23:17:18,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:17:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:17:18,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:18,113 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:18,575 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2021-05-02 23:17:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:17:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 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 138 [2021-05-02 23:17:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:18,577 INFO L225 Difference]: With dead ends: 389 [2021-05-02 23:17:18,577 INFO L226 Difference]: Without dead ends: 375 [2021-05-02 23:17:18,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:17:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-02 23:17:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 141. [2021-05-02 23:17:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 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 23:17:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 23:17:18,596 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2021-05-02 23:17:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:18,596 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 23:17:18,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 62 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 23:17:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:17:18,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:18,596 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:18,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:18,596 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash -627392473, now seen corresponding path program 60 times [2021-05-02 23:17:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279526290] [2021-05-02 23:17:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:18,600 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:18,600 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,996 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 23:17:19,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:19,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279526290] [2021-05-02 23:17:19,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1279526290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:19,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:19,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:19,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975830216] [2021-05-02 23:17:19,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:19,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:19,997 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:20,519 INFO L93 Difference]: Finished difference Result 395 states and 456 transitions. [2021-05-02 23:17:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 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 140 [2021-05-02 23:17:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:20,521 INFO L225 Difference]: With dead ends: 395 [2021-05-02 23:17:20,521 INFO L226 Difference]: Without dead ends: 381 [2021-05-02 23:17:20,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1344.2ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-02 23:17:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 143. [2021-05-02 23:17:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 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 23:17:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-05-02 23:17:20,542 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2021-05-02 23:17:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:20,542 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-05-02 23:17:20,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-05-02 23:17:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:17:20,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:20,542 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:20,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:20,543 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:20,543 INFO L82 PathProgramCache]: Analyzing trace with hash 903876937, now seen corresponding path program 61 times [2021-05-02 23:17:20,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:20,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314130349] [2021-05-02 23:17:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:20,546 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:20,546 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:21,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:21,962 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 23:17:21,962 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314130349] [2021-05-02 23:17:21,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314130349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:21,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:21,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799969886] [2021-05-02 23:17:21,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:21,963 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,583 INFO L93 Difference]: Finished difference Result 401 states and 463 transitions. [2021-05-02 23:17:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 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 142 [2021-05-02 23:17:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,585 INFO L225 Difference]: With dead ends: 401 [2021-05-02 23:17:22,585 INFO L226 Difference]: Without dead ends: 387 [2021-05-02 23:17:22,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1365.7ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-02 23:17:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 145. [2021-05-02 23:17:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 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 23:17:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-05-02 23:17:22,610 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2021-05-02 23:17:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,611 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-05-02 23:17:22,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 64 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-05-02 23:17:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 23:17:22,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,611 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:22,611 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash -720002581, now seen corresponding path program 62 times [2021-05-02 23:17:22,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502125584] [2021-05-02 23:17:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,615 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:22,615 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,113 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 23:17:24,113 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:24,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502125584] [2021-05-02 23:17:24,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502125584] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:24,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:24,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851164962] [2021-05-02 23:17:24,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:24,114 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:24,657 INFO L93 Difference]: Finished difference Result 407 states and 470 transitions. [2021-05-02 23:17:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:24,657 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 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 144 [2021-05-02 23:17:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:24,659 INFO L225 Difference]: With dead ends: 407 [2021-05-02 23:17:24,659 INFO L226 Difference]: Without dead ends: 393 [2021-05-02 23:17:24,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1417.5ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-02 23:17:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 147. [2021-05-02 23:17:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 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 23:17:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2021-05-02 23:17:24,680 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2021-05-02 23:17:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:24,680 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2021-05-02 23:17:24,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2021-05-02 23:17:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:17:24,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:24,681 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:24,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:24,681 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2099876365, now seen corresponding path program 63 times [2021-05-02 23:17:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534043655] [2021-05-02 23:17:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:24,695 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:24,696 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:26,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:26,198 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 23:17:26,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534043655] [2021-05-02 23:17:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [534043655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:26,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:26,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:26,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692052843] [2021-05-02 23:17:26,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:26,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:26,199 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:26,695 INFO L93 Difference]: Finished difference Result 413 states and 477 transitions. [2021-05-02 23:17:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:26,695 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 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 146 [2021-05-02 23:17:26,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:26,696 INFO L225 Difference]: With dead ends: 413 [2021-05-02 23:17:26,696 INFO L226 Difference]: Without dead ends: 399 [2021-05-02 23:17:26,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1449.7ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:26,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-02 23:17:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 149. [2021-05-02 23:17:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 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 23:17:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 23:17:26,721 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2021-05-02 23:17:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:26,721 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 23:17:26,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 23:17:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:17:26,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:26,722 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:26,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:26,722 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1879179695, now seen corresponding path program 64 times [2021-05-02 23:17:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:26,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118856468] [2021-05-02 23:17:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:26,725 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:26,725 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:28,268 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 23:17:28,269 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:28,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118856468] [2021-05-02 23:17:28,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [118856468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:28,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:28,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479982829] [2021-05-02 23:17:28,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:28,270 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:28,959 INFO L93 Difference]: Finished difference Result 419 states and 484 transitions. [2021-05-02 23:17:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 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 148 [2021-05-02 23:17:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:28,961 INFO L225 Difference]: With dead ends: 419 [2021-05-02 23:17:28,961 INFO L226 Difference]: Without dead ends: 405 [2021-05-02 23:17:28,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-02 23:17:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 151. [2021-05-02 23:17:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 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 23:17:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2021-05-02 23:17:28,985 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2021-05-02 23:17:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:28,985 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2021-05-02 23:17:28,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 67 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2021-05-02 23:17:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:17:28,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:28,986 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:28,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:28,986 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash 243077329, now seen corresponding path program 65 times [2021-05-02 23:17:28,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:28,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919281012] [2021-05-02 23:17:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:28,989 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:28,990 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,587 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 23:17:30,588 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:30,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919281012] [2021-05-02 23:17:30,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [919281012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:30,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:30,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:30,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142322848] [2021-05-02 23:17:30,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:30,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:30,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:30,589 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:31,175 INFO L93 Difference]: Finished difference Result 425 states and 491 transitions. [2021-05-02 23:17:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 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 150 [2021-05-02 23:17:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:31,177 INFO L225 Difference]: With dead ends: 425 [2021-05-02 23:17:31,177 INFO L226 Difference]: Without dead ends: 411 [2021-05-02 23:17:31,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1545.5ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:31,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-02 23:17:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 153. [2021-05-02 23:17:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 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 23:17:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-05-02 23:17:31,201 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2021-05-02 23:17:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:31,201 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-05-02 23:17:31,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-05-02 23:17:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 23:17:31,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:31,202 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:31,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:31,202 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash -93266061, now seen corresponding path program 66 times [2021-05-02 23:17:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:31,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476333887] [2021-05-02 23:17:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:31,214 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:31,215 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,896 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 23:17:32,896 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:32,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476333887] [2021-05-02 23:17:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [476333887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:32,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:32,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:32,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253541765] [2021-05-02 23:17:32,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:32,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:32,898 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:33,660 INFO L93 Difference]: Finished difference Result 431 states and 498 transitions. [2021-05-02 23:17:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 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 152 [2021-05-02 23:17:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:33,665 INFO L225 Difference]: With dead ends: 431 [2021-05-02 23:17:33,666 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 23:17:33,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1622.6ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 23:17:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 155. [2021-05-02 23:17:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 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 23:17:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2021-05-02 23:17:33,692 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2021-05-02 23:17:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:33,692 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2021-05-02 23:17:33,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.057142857142857) internal successors, (144), 69 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2021-05-02 23:17:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:17:33,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:33,692 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:33,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:33,693 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1196716651, now seen corresponding path program 67 times [2021-05-02 23:17:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:33,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126727163] [2021-05-02 23:17:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:33,696 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:33,696 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,395 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 23:17:35,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126727163] [2021-05-02 23:17:35,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126727163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:35,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:35,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:35,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154761562] [2021-05-02 23:17:35,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:35,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:35,396 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:36,027 INFO L93 Difference]: Finished difference Result 437 states and 505 transitions. [2021-05-02 23:17:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 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 154 [2021-05-02 23:17:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:36,029 INFO L225 Difference]: With dead ends: 437 [2021-05-02 23:17:36,029 INFO L226 Difference]: Without dead ends: 423 [2021-05-02 23:17:36,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1640.5ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-02 23:17:36,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 157. [2021-05-02 23:17:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 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 23:17:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 23:17:36,056 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2021-05-02 23:17:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:36,056 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 23:17:36,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.056338028169014) internal successors, (146), 70 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 23:17:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:17:36,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:36,057 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:36,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:36,057 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -755811529, now seen corresponding path program 68 times [2021-05-02 23:17:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:36,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076733167] [2021-05-02 23:17:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:36,060 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:36,061 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,821 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 23:17:37,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:37,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076733167] [2021-05-02 23:17:37,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076733167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:37,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:37,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:37,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219902716] [2021-05-02 23:17:37,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:37,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:37,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:37,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:37,822 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:38,431 INFO L93 Difference]: Finished difference Result 443 states and 512 transitions. [2021-05-02 23:17:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 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 156 [2021-05-02 23:17:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:38,432 INFO L225 Difference]: With dead ends: 443 [2021-05-02 23:17:38,432 INFO L226 Difference]: Without dead ends: 429 [2021-05-02 23:17:38,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1699.5ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-02 23:17:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 159. [2021-05-02 23:17:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 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 23:17:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2021-05-02 23:17:38,459 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2021-05-02 23:17:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,460 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2021-05-02 23:17:38,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 71 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2021-05-02 23:17:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:17:38,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,460 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:38,460 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2047215705, now seen corresponding path program 69 times [2021-05-02 23:17:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368300615] [2021-05-02 23:17:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,464 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,464 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,307 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 23:17:40,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368300615] [2021-05-02 23:17:40,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368300615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:40,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612564454] [2021-05-02 23:17:40,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:40,309 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:40,907 INFO L93 Difference]: Finished difference Result 449 states and 519 transitions. [2021-05-02 23:17:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 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 158 [2021-05-02 23:17:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:40,909 INFO L225 Difference]: With dead ends: 449 [2021-05-02 23:17:40,909 INFO L226 Difference]: Without dead ends: 435 [2021-05-02 23:17:40,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1772.3ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-02 23:17:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 161. [2021-05-02 23:17:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 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 23:17:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-05-02 23:17:40,937 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2021-05-02 23:17:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:40,937 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-05-02 23:17:40,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-05-02 23:17:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:17:40,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:40,938 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:40,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:40,938 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1483074309, now seen corresponding path program 70 times [2021-05-02 23:17:40,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:40,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211990313] [2021-05-02 23:17:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:40,944 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:40,945 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:42,851 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 23:17:42,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211990313] [2021-05-02 23:17:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [211990313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:42,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:42,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308459414] [2021-05-02 23:17:42,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:42,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:42,853 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:43,497 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2021-05-02 23:17:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:43,497 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 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 160 [2021-05-02 23:17:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:43,499 INFO L225 Difference]: With dead ends: 455 [2021-05-02 23:17:43,499 INFO L226 Difference]: Without dead ends: 441 [2021-05-02 23:17:43,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1826.5ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-05-02 23:17:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 163. [2021-05-02 23:17:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 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 23:17:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2021-05-02 23:17:43,527 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2021-05-02 23:17:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:43,528 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2021-05-02 23:17:43,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.054054054054054) internal successors, (152), 73 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2021-05-02 23:17:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:17:43,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:43,528 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:43,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:43,528 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1067613923, now seen corresponding path program 71 times [2021-05-02 23:17:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:43,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368300624] [2021-05-02 23:17:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:43,534 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:43,535 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:45,503 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 23:17:45,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:45,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368300624] [2021-05-02 23:17:45,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368300624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:45,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:45,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:45,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594866456] [2021-05-02 23:17:45,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:45,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:45,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:45,505 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:46,355 INFO L93 Difference]: Finished difference Result 461 states and 533 transitions. [2021-05-02 23:17:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 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 162 [2021-05-02 23:17:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:46,359 INFO L225 Difference]: With dead ends: 461 [2021-05-02 23:17:46,359 INFO L226 Difference]: Without dead ends: 447 [2021-05-02 23:17:46,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1906.5ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-02 23:17:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 165. [2021-05-02 23:17:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 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 23:17:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 23:17:46,394 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2021-05-02 23:17:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:46,394 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 23:17:46,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 23:17:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 23:17:46,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:46,395 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:46,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:46,395 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:46,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1242141505, now seen corresponding path program 72 times [2021-05-02 23:17:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:46,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693273910] [2021-05-02 23:17:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:46,398 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:46,399 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:48,363 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 23:17:48,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693273910] [2021-05-02 23:17:48,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [693273910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:48,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:48,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:48,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503355656] [2021-05-02 23:17:48,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:48,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:48,365 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:49,148 INFO L93 Difference]: Finished difference Result 467 states and 540 transitions. [2021-05-02 23:17:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:49,148 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 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 164 [2021-05-02 23:17:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:49,150 INFO L225 Difference]: With dead ends: 467 [2021-05-02 23:17:49,150 INFO L226 Difference]: Without dead ends: 453 [2021-05-02 23:17:49,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1905.5ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-02 23:17:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 167. [2021-05-02 23:17:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0123456790123457) internal successors, (164), 162 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 23:17:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2021-05-02 23:17:49,185 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2021-05-02 23:17:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:49,185 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2021-05-02 23:17:49,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 75 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2021-05-02 23:17:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:17:49,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:49,186 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:49,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:49,186 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:49,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1459423263, now seen corresponding path program 73 times [2021-05-02 23:17:49,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:49,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867185617] [2021-05-02 23:17:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:49,191 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:49,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:51,232 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 23:17:51,232 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:51,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867185617] [2021-05-02 23:17:51,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [867185617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:51,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:51,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:51,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142961176] [2021-05-02 23:17:51,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:51,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:51,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:51,234 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:52,134 INFO L93 Difference]: Finished difference Result 473 states and 547 transitions. [2021-05-02 23:17:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 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 166 [2021-05-02 23:17:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:52,135 INFO L225 Difference]: With dead ends: 473 [2021-05-02 23:17:52,136 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 23:17:52,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1980.6ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 23:17:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 169. [2021-05-02 23:17:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 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 23:17:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-05-02 23:17:52,167 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2021-05-02 23:17:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:52,167 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-05-02 23:17:52,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 76 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-05-02 23:17:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 23:17:52,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:52,168 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:52,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:52,168 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash 186204803, now seen corresponding path program 74 times [2021-05-02 23:17:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:52,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902293124] [2021-05-02 23:17:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:52,174 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:52,175 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:54,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:54,277 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 23:17:54,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902293124] [2021-05-02 23:17:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [902293124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:54,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:54,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096591658] [2021-05-02 23:17:54,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:54,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:54,278 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:54,971 INFO L93 Difference]: Finished difference Result 479 states and 554 transitions. [2021-05-02 23:17:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:54,972 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 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 168 [2021-05-02 23:17:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:54,973 INFO L225 Difference]: With dead ends: 479 [2021-05-02 23:17:54,973 INFO L226 Difference]: Without dead ends: 465 [2021-05-02 23:17:54,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2030.0ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-02 23:17:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 171. [2021-05-02 23:17:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 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 23:17:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-05-02 23:17:55,011 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2021-05-02 23:17:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:55,011 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-05-02 23:17:55,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 77 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-05-02 23:17:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:17:55,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:55,012 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:55,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:55,012 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1086811301, now seen corresponding path program 75 times [2021-05-02 23:17:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:55,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400525440] [2021-05-02 23:17:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:55,016 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:55,017 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:57,184 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 23:17:57,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400525440] [2021-05-02 23:17:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400525440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:57,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:57,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:17:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287331682] [2021-05-02 23:17:57,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:17:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:17:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:57,185 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:57,999 INFO L93 Difference]: Finished difference Result 485 states and 561 transitions. [2021-05-02 23:17:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:17:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 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 170 [2021-05-02 23:17:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:58,001 INFO L225 Difference]: With dead ends: 485 [2021-05-02 23:17:58,001 INFO L226 Difference]: Without dead ends: 471 [2021-05-02 23:17:58,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2098.2ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-02 23:17:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 173. [2021-05-02 23:17:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 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 23:17:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 23:17:58,035 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2021-05-02 23:17:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:58,035 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 23:17:58,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.050632911392405) internal successors, (162), 78 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 23:17:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 23:17:58,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:58,036 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:58,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:17:58,036 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1013737913, now seen corresponding path program 76 times [2021-05-02 23:17:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354732749] [2021-05-02 23:17:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:58,043 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:58,043 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:00,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:00,372 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 23:18:00,373 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:00,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354732749] [2021-05-02 23:18:00,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1354732749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:00,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:00,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:18:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48577780] [2021-05-02 23:18:00,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:18:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:18:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:18:00,374 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:01,314 INFO L93 Difference]: Finished difference Result 491 states and 568 transitions. [2021-05-02 23:18:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:18:01,315 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 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 172 [2021-05-02 23:18:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:01,316 INFO L225 Difference]: With dead ends: 491 [2021-05-02 23:18:01,316 INFO L226 Difference]: Without dead ends: 477 [2021-05-02 23:18:01,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2258.9ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:18:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-05-02 23:18:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 175. [2021-05-02 23:18:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 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 23:18:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-05-02 23:18:01,352 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2021-05-02 23:18:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:01,352 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-05-02 23:18:01,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.05) internal successors, (164), 79 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-05-02 23:18:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 23:18:01,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:01,352 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:01,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:18:01,353 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:01,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1006903447, now seen corresponding path program 77 times [2021-05-02 23:18:01,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:01,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729024288] [2021-05-02 23:18:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:01,371 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:01,371 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,642 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 23:18:03,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:03,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729024288] [2021-05-02 23:18:03,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [729024288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:03,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:03,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:18:03,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336057909] [2021-05-02 23:18:03,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:18:03,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:03,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:18:03,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:03,644 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:04,557 INFO L93 Difference]: Finished difference Result 497 states and 575 transitions. [2021-05-02 23:18:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:18:04,557 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 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 174 [2021-05-02 23:18:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:04,559 INFO L225 Difference]: With dead ends: 497 [2021-05-02 23:18:04,559 INFO L226 Difference]: Without dead ends: 483 [2021-05-02 23:18:04,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2207.2ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:18:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-02 23:18:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 177. [2021-05-02 23:18:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 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 23:18:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-05-02 23:18:04,595 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2021-05-02 23:18:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:04,596 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-05-02 23:18:04,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.049382716049383) internal successors, (166), 80 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-05-02 23:18:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 23:18:04,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:04,596 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:04,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:18:04,597 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:04,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1266051083, now seen corresponding path program 78 times [2021-05-02 23:18:04,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:04,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826913150] [2021-05-02 23:18:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:04,600 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:04,600 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,908 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 23:18:06,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:06,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826913150] [2021-05-02 23:18:06,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826913150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:06,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:06,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:18:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659035340] [2021-05-02 23:18:06,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:18:06,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:18:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:06,909 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:07,685 INFO L93 Difference]: Finished difference Result 503 states and 582 transitions. [2021-05-02 23:18:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:18:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 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 176 [2021-05-02 23:18:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:07,687 INFO L225 Difference]: With dead ends: 503 [2021-05-02 23:18:07,687 INFO L226 Difference]: Without dead ends: 489 [2021-05-02 23:18:07,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2241.5ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:18:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-02 23:18:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 179. [2021-05-02 23:18:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 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 23:18:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2021-05-02 23:18:07,724 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2021-05-02 23:18:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:07,724 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2021-05-02 23:18:07,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.048780487804878) internal successors, (168), 81 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2021-05-02 23:18:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 23:18:07,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:07,725 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:07,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:18:07,725 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -562999251, now seen corresponding path program 79 times [2021-05-02 23:18:07,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:07,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471790275] [2021-05-02 23:18:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:07,728 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:07,729 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,122 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 23:18:10,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:10,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471790275] [2021-05-02 23:18:10,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [471790275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:10,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:10,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:18:10,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39761553] [2021-05-02 23:18:10,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:18:10,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:18:10,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:10,123 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:11,148 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2021-05-02 23:18:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:18:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 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 178 [2021-05-02 23:18:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:11,150 INFO L225 Difference]: With dead ends: 509 [2021-05-02 23:18:11,150 INFO L226 Difference]: Without dead ends: 495 [2021-05-02 23:18:11,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2327.2ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:18:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-02 23:18:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 181. [2021-05-02 23:18:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 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 23:18:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 23:18:11,194 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2021-05-02 23:18:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:11,194 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 23:18:11,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 82 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 23:18:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 23:18:11,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:11,195 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:11,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:18:11,195 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1638746161, now seen corresponding path program 80 times [2021-05-02 23:18:11,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:11,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793103749] [2021-05-02 23:18:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:11,199 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:11,200 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:13,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:13,645 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 23:18:13,645 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:13,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793103749] [2021-05-02 23:18:13,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793103749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:13,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:13,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:18:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833678979] [2021-05-02 23:18:13,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:18:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:18:13,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:13,647 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:14,589 INFO L93 Difference]: Finished difference Result 515 states and 596 transitions. [2021-05-02 23:18:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:18:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 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 180 [2021-05-02 23:18:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:14,591 INFO L225 Difference]: With dead ends: 515 [2021-05-02 23:18:14,591 INFO L226 Difference]: Without dead ends: 501 [2021-05-02 23:18:14,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2361.2ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:18:14,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-05-02 23:18:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 183. [2021-05-02 23:18:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 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 23:18:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-05-02 23:18:14,632 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2021-05-02 23:18:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:14,632 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-05-02 23:18:14,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0476190476190474) internal successors, (172), 83 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-05-02 23:18:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 23:18:14,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:14,633 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:14,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:18:14,633 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -344408335, now seen corresponding path program 81 times [2021-05-02 23:18:14,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:14,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422168020] [2021-05-02 23:18:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:14,636 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:14,637 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,136 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 23:18:17,136 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:17,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422168020] [2021-05-02 23:18:17,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422168020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:17,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:17,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:18:17,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38288338] [2021-05-02 23:18:17,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:18:17,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:17,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:18:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:17,138 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:18,319 INFO L93 Difference]: Finished difference Result 521 states and 603 transitions. [2021-05-02 23:18:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:18:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 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 182 [2021-05-02 23:18:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:18,321 INFO L225 Difference]: With dead ends: 521 [2021-05-02 23:18:18,321 INFO L226 Difference]: Without dead ends: 507 [2021-05-02 23:18:18,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2430.3ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:18:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-02 23:18:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 185. [2021-05-02 23:18:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 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 23:18:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-05-02 23:18:18,362 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2021-05-02 23:18:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:18,362 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-05-02 23:18:18,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 84 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-05-02 23:18:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-02 23:18:18,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:18,364 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:18,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:18:18,364 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2026273389, now seen corresponding path program 82 times [2021-05-02 23:18:18,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:18,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925033298] [2021-05-02 23:18:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:18,371 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:18,372 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,969 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 23:18:20,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:20,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925033298] [2021-05-02 23:18:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [925033298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:20,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:18:20,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942925918] [2021-05-02 23:18:20,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:18:20,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:20,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:18:20,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:20,970 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:21,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:21,797 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2021-05-02 23:18:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:18:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 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 184 [2021-05-02 23:18:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:21,799 INFO L225 Difference]: With dead ends: 527 [2021-05-02 23:18:21,799 INFO L226 Difference]: Without dead ends: 513 [2021-05-02 23:18:21,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2526.2ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:18:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-05-02 23:18:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 187. [2021-05-02 23:18:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 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 23:18:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2021-05-02 23:18:21,844 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2021-05-02 23:18:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:21,844 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2021-05-02 23:18:21,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.046511627906977) internal successors, (176), 85 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2021-05-02 23:18:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 23:18:21,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:21,845 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:21,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:21,845 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 904080309, now seen corresponding path program 83 times [2021-05-02 23:18:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016948811] [2021-05-02 23:18:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:21,848 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:21,849 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:24,521 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 23:18:24,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016948811] [2021-05-02 23:18:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016948811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:24,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:24,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:18:24,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457764812] [2021-05-02 23:18:24,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:18:24,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:18:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:24,522 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:25,487 INFO L93 Difference]: Finished difference Result 533 states and 617 transitions. [2021-05-02 23:18:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:18:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 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 186 [2021-05-02 23:18:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:25,489 INFO L225 Difference]: With dead ends: 533 [2021-05-02 23:18:25,489 INFO L226 Difference]: Without dead ends: 519 [2021-05-02 23:18:25,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2600.3ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-02 23:18:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 189. [2021-05-02 23:18:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 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 23:18:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-02 23:18:25,533 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2021-05-02 23:18:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:25,533 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-02 23:18:25,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.045977011494253) internal successors, (178), 86 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-02 23:18:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 23:18:25,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:25,534 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:25,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:25,534 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash -524562089, now seen corresponding path program 84 times [2021-05-02 23:18:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:25,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931562164] [2021-05-02 23:18:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:25,537 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:25,538 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:28,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:28,245 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 23:18:28,245 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931562164] [2021-05-02 23:18:28,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [931562164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:28,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:28,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:28,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068298692] [2021-05-02 23:18:28,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:28,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:28,246 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:29,224 INFO L93 Difference]: Finished difference Result 539 states and 624 transitions. [2021-05-02 23:18:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 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 188 [2021-05-02 23:18:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:29,226 INFO L225 Difference]: With dead ends: 539 [2021-05-02 23:18:29,226 INFO L226 Difference]: Without dead ends: 525 [2021-05-02 23:18:29,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2635.2ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-05-02 23:18:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 191. [2021-05-02 23:18:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.010752688172043) internal successors, (188), 186 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 23:18:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2021-05-02 23:18:29,271 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2021-05-02 23:18:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:29,272 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2021-05-02 23:18:29,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0454545454545454) internal successors, (180), 87 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2021-05-02 23:18:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:18:29,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:29,272 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:29,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:29,273 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 939628153, now seen corresponding path program 85 times [2021-05-02 23:18:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:29,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639637358] [2021-05-02 23:18:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:29,277 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:29,277 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:32,087 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 23:18:32,088 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:32,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639637358] [2021-05-02 23:18:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639637358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530445390] [2021-05-02 23:18:32,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:32,089 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:33,014 INFO L93 Difference]: Finished difference Result 545 states and 631 transitions. [2021-05-02 23:18:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 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 190 [2021-05-02 23:18:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:33,015 INFO L225 Difference]: With dead ends: 545 [2021-05-02 23:18:33,016 INFO L226 Difference]: Without dead ends: 531 [2021-05-02 23:18:33,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2728.8ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-02 23:18:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 193. [2021-05-02 23:18:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 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 23:18:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2021-05-02 23:18:33,063 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2021-05-02 23:18:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:33,063 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2021-05-02 23:18:33,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.044943820224719) internal successors, (182), 88 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2021-05-02 23:18:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-02 23:18:33,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:33,064 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:33,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:33,064 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:33,064 INFO L82 PathProgramCache]: Analyzing trace with hash -722822373, now seen corresponding path program 86 times [2021-05-02 23:18:33,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:33,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884768483] [2021-05-02 23:18:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:33,067 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:33,068 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,011 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 23:18:36,011 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884768483] [2021-05-02 23:18:36,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [884768483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:36,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:36,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615713673] [2021-05-02 23:18:36,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:36,013 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:37,167 INFO L93 Difference]: Finished difference Result 551 states and 638 transitions. [2021-05-02 23:18:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 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 192 [2021-05-02 23:18:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:37,178 INFO L225 Difference]: With dead ends: 551 [2021-05-02 23:18:37,178 INFO L226 Difference]: Without dead ends: 537 [2021-05-02 23:18:37,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2847.7ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-02 23:18:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 195. [2021-05-02 23:18:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 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 23:18:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2021-05-02 23:18:37,226 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2021-05-02 23:18:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:37,227 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2021-05-02 23:18:37,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 89 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2021-05-02 23:18:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 23:18:37,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:37,227 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:37,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:37,228 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash -609943747, now seen corresponding path program 87 times [2021-05-02 23:18:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:37,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849875690] [2021-05-02 23:18:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:37,231 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:37,232 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:40,211 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 23:18:40,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:40,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849875690] [2021-05-02 23:18:40,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1849875690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:40,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:40,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:40,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357053338] [2021-05-02 23:18:40,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:40,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:40,213 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:41,491 INFO L93 Difference]: Finished difference Result 557 states and 645 transitions. [2021-05-02 23:18:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 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 194 [2021-05-02 23:18:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:41,494 INFO L225 Difference]: With dead ends: 557 [2021-05-02 23:18:41,494 INFO L226 Difference]: Without dead ends: 543 [2021-05-02 23:18:41,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2902.2ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-05-02 23:18:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 197. [2021-05-02 23:18:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 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 23:18:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-02 23:18:41,544 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2021-05-02 23:18:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:41,544 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-02 23:18:41,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.043956043956044) internal successors, (186), 90 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-02 23:18:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 23:18:41,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:41,545 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:41,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:41,545 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash 492233439, now seen corresponding path program 88 times [2021-05-02 23:18:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:41,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432655540] [2021-05-02 23:18:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:41,549 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:41,550 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:44,548 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 23:18:44,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:44,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432655540] [2021-05-02 23:18:44,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [432655540] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:44,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:44,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:44,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070677582] [2021-05-02 23:18:44,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:44,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:44,549 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:45,612 INFO L93 Difference]: Finished difference Result 563 states and 652 transitions. [2021-05-02 23:18:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 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 196 [2021-05-02 23:18:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:45,614 INFO L225 Difference]: With dead ends: 563 [2021-05-02 23:18:45,615 INFO L226 Difference]: Without dead ends: 549 [2021-05-02 23:18:45,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2917.1ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-02 23:18:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 199. [2021-05-02 23:18:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 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 23:18:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2021-05-02 23:18:45,676 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2021-05-02 23:18:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:45,676 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2021-05-02 23:18:45,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 91 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2021-05-02 23:18:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 23:18:45,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:45,676 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:45,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:45,677 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:45,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:45,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1172412927, now seen corresponding path program 89 times [2021-05-02 23:18:45,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:45,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165401119] [2021-05-02 23:18:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:45,680 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:45,681 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:48,774 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 23:18:48,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165401119] [2021-05-02 23:18:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165401119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:48,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:48,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:48,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663663527] [2021-05-02 23:18:48,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:48,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:48,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:48,776 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:49,971 INFO L93 Difference]: Finished difference Result 569 states and 659 transitions. [2021-05-02 23:18:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:18:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 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 198 [2021-05-02 23:18:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:49,973 INFO L225 Difference]: With dead ends: 569 [2021-05-02 23:18:49,973 INFO L226 Difference]: Without dead ends: 555 [2021-05-02 23:18:49,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3016.9ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-05-02 23:18:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 201. [2021-05-02 23:18:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 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 23:18:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-05-02 23:18:50,026 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2021-05-02 23:18:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:50,026 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-05-02 23:18:50,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.043010752688172) internal successors, (190), 92 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-05-02 23:18:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 23:18:50,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:50,027 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:50,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:18:50,027 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1125230755, now seen corresponding path program 90 times [2021-05-02 23:18:50,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:50,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095549087] [2021-05-02 23:18:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:50,030 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:50,031 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:53,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:53,209 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 23:18:53,210 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:53,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095549087] [2021-05-02 23:18:53,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095549087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:53,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:53,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:18:53,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331332975] [2021-05-02 23:18:53,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:18:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:18:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:53,211 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:54,643 INFO L93 Difference]: Finished difference Result 575 states and 666 transitions. [2021-05-02 23:18:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:18:54,643 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 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 200 [2021-05-02 23:18:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:54,645 INFO L225 Difference]: With dead ends: 575 [2021-05-02 23:18:54,645 INFO L226 Difference]: Without dead ends: 561 [2021-05-02 23:18:54,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3099.3ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-05-02 23:18:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 203. [2021-05-02 23:18:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0101010101010102) internal successors, (200), 198 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 23:18:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2021-05-02 23:18:54,699 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2021-05-02 23:18:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:54,699 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2021-05-02 23:18:54,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0425531914893615) internal successors, (192), 93 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2021-05-02 23:18:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 23:18:54,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:54,700 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:54,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:18:54,700 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619013, now seen corresponding path program 91 times [2021-05-02 23:18:54,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252133178] [2021-05-02 23:18:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:54,711 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:54,712 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:57,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:57,972 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 23:18:57,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:57,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252133178] [2021-05-02 23:18:57,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252133178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:57,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:57,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:18:57,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457347218] [2021-05-02 23:18:57,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:18:57,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:18:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:57,973 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:59,510 INFO L93 Difference]: Finished difference Result 581 states and 673 transitions. [2021-05-02 23:18:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:18:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 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 202 [2021-05-02 23:18:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:59,531 INFO L225 Difference]: With dead ends: 581 [2021-05-02 23:18:59,531 INFO L226 Difference]: Without dead ends: 567 [2021-05-02 23:18:59,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3161.0ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-02 23:18:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 205. [2021-05-02 23:18:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 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 23:18:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-02 23:18:59,586 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2021-05-02 23:18:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:59,586 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-02 23:18:59,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.042105263157895) internal successors, (194), 94 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:59,587 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-02 23:18:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 23:18:59,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:59,587 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:59,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:18:59,587 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash -559158169, now seen corresponding path program 92 times [2021-05-02 23:18:59,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:59,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680767782] [2021-05-02 23:18:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:59,596 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:59,602 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:02,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:02,933 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 23:19:02,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680767782] [2021-05-02 23:19:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [680767782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:02,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:02,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:19:02,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028392395] [2021-05-02 23:19:02,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:19:02,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:19:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:02,935 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:04,545 INFO L93 Difference]: Finished difference Result 587 states and 680 transitions. [2021-05-02 23:19:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:19:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 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 204 [2021-05-02 23:19:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:04,550 INFO L225 Difference]: With dead ends: 587 [2021-05-02 23:19:04,559 INFO L226 Difference]: Without dead ends: 573 [2021-05-02 23:19:04,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3250.9ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:19:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-02 23:19:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 207. [2021-05-02 23:19:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 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 23:19:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-05-02 23:19:04,616 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2021-05-02 23:19:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:04,616 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-05-02 23:19:04,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0416666666666665) internal successors, (196), 95 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-05-02 23:19:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 23:19:04,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:04,617 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:04,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:19:04,617 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2052533641, now seen corresponding path program 93 times [2021-05-02 23:19:04,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:04,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075948484] [2021-05-02 23:19:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:04,621 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:04,622 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:08,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:08,018 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 23:19:08,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:08,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075948484] [2021-05-02 23:19:08,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075948484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:08,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:08,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:19:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143753103] [2021-05-02 23:19:08,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:19:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:19:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:08,020 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:09,479 INFO L93 Difference]: Finished difference Result 593 states and 687 transitions. [2021-05-02 23:19:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:19:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 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 206 [2021-05-02 23:19:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:09,481 INFO L225 Difference]: With dead ends: 593 [2021-05-02 23:19:09,481 INFO L226 Difference]: Without dead ends: 579 [2021-05-02 23:19:09,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3312.7ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:19:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-02 23:19:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 209. [2021-05-02 23:19:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 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 23:19:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-05-02 23:19:09,546 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-05-02 23:19:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:09,546 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-05-02 23:19:09,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 96 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-05-02 23:19:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 23:19:09,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:09,547 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:09,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:19:09,547 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash -667505109, now seen corresponding path program 94 times [2021-05-02 23:19:09,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:09,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910822144] [2021-05-02 23:19:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:09,551 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:09,552 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:13,067 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 23:19:13,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910822144] [2021-05-02 23:19:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910822144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:19:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662352578] [2021-05-02 23:19:13,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:19:13,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:19:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:13,069 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:14,257 INFO L93 Difference]: Finished difference Result 599 states and 694 transitions. [2021-05-02 23:19:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:19:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 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 208 [2021-05-02 23:19:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:14,259 INFO L225 Difference]: With dead ends: 599 [2021-05-02 23:19:14,276 INFO L226 Difference]: Without dead ends: 585 [2021-05-02 23:19:14,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3431.2ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:19:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-02 23:19:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 211. [2021-05-02 23:19:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 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 23:19:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2021-05-02 23:19:14,337 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2021-05-02 23:19:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:14,337 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2021-05-02 23:19:14,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 97 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2021-05-02 23:19:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:19:14,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:14,338 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:14,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:19:14,339 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1010339405, now seen corresponding path program 95 times [2021-05-02 23:19:14,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:14,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785636054] [2021-05-02 23:19:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:14,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:14,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,917 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 23:19:17,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:17,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785636054] [2021-05-02 23:19:17,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [785636054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:17,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:17,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:19:17,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057387509] [2021-05-02 23:19:17,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:19:17,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:17,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:19:17,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:17,918 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:19,713 INFO L93 Difference]: Finished difference Result 605 states and 701 transitions. [2021-05-02 23:19:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:19:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 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 210 [2021-05-02 23:19:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:19,715 INFO L225 Difference]: With dead ends: 605 [2021-05-02 23:19:19,715 INFO L226 Difference]: Without dead ends: 591 [2021-05-02 23:19:19,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3479.1ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:19:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-02 23:19:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 213. [2021-05-02 23:19:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 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 23:19:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-05-02 23:19:19,777 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2021-05-02 23:19:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:19,777 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-05-02 23:19:19,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.04040404040404) internal successors, (202), 98 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-05-02 23:19:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 23:19:19,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:19,778 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:19,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:19:19,778 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1488785937, now seen corresponding path program 96 times [2021-05-02 23:19:19,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:19,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116107949] [2021-05-02 23:19:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:19,786 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:19,787 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:23,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:23,487 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 23:19:23,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116107949] [2021-05-02 23:19:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [116107949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:19:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571339700] [2021-05-02 23:19:23,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:19:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:19:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:23,488 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:24,796 INFO L93 Difference]: Finished difference Result 611 states and 708 transitions. [2021-05-02 23:19:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:19:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 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 212 [2021-05-02 23:19:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:24,798 INFO L225 Difference]: With dead ends: 611 [2021-05-02 23:19:24,798 INFO L226 Difference]: Without dead ends: 597 [2021-05-02 23:19:24,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3600.1ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:19:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-02 23:19:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 215. [2021-05-02 23:19:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0095238095238095) internal successors, (212), 210 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 23:19:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2021-05-02 23:19:24,863 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2021-05-02 23:19:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:24,863 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2021-05-02 23:19:24,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.04) internal successors, (204), 99 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2021-05-02 23:19:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 23:19:24,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:24,865 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:24,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:19:24,865 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:24,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2033446161, now seen corresponding path program 97 times [2021-05-02 23:19:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:24,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212884971] [2021-05-02 23:19:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:24,873 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:24,874 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:28,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:28,649 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 23:19:28,649 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:28,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212884971] [2021-05-02 23:19:28,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212884971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:28,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:28,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:19:28,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455926621] [2021-05-02 23:19:28,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:19:28,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:19:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:28,651 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:30,243 INFO L93 Difference]: Finished difference Result 617 states and 715 transitions. [2021-05-02 23:19:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:19:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 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 214 [2021-05-02 23:19:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:30,245 INFO L225 Difference]: With dead ends: 617 [2021-05-02 23:19:30,245 INFO L226 Difference]: Without dead ends: 603 [2021-05-02 23:19:30,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3683.1ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:19:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-05-02 23:19:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 217. [2021-05-02 23:19:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 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 23:19:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-05-02 23:19:30,318 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2021-05-02 23:19:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:30,318 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-05-02 23:19:30,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0396039603960396) internal successors, (206), 100 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-05-02 23:19:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-02 23:19:30,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:30,319 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:30,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:30,319 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1830704205, now seen corresponding path program 98 times [2021-05-02 23:19:30,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:30,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640384279] [2021-05-02 23:19:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:30,326 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:30,326 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:34,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:34,254 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 23:19:34,254 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640384279] [2021-05-02 23:19:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [640384279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:34,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:34,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:19:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761863791] [2021-05-02 23:19:34,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:19:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:19:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:34,256 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:36,190 INFO L93 Difference]: Finished difference Result 623 states and 722 transitions. [2021-05-02 23:19:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:19:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 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 216 [2021-05-02 23:19:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:36,192 INFO L225 Difference]: With dead ends: 623 [2021-05-02 23:19:36,192 INFO L226 Difference]: Without dead ends: 609 [2021-05-02 23:19:36,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3837.7ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-05-02 23:19:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 219. [2021-05-02 23:19:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 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 23:19:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2021-05-02 23:19:36,260 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2021-05-02 23:19:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:36,261 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2021-05-02 23:19:36,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 101 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2021-05-02 23:19:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:19:36,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:36,261 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:36,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:36,262 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:36,262 INFO L82 PathProgramCache]: Analyzing trace with hash -132494891, now seen corresponding path program 99 times [2021-05-02 23:19:36,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:36,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278750374] [2021-05-02 23:19:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:36,266 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:36,266 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:40,433 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 23:19:40,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:40,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278750374] [2021-05-02 23:19:40,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [278750374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:40,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:40,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:19:40,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344932833] [2021-05-02 23:19:40,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:19:40,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:19:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:40,435 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:42,428 INFO L93 Difference]: Finished difference Result 629 states and 729 transitions. [2021-05-02 23:19:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:19:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 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 218 [2021-05-02 23:19:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:42,430 INFO L225 Difference]: With dead ends: 629 [2021-05-02 23:19:42,430 INFO L226 Difference]: Without dead ends: 615 [2021-05-02 23:19:42,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4069.0ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-02 23:19:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 221. [2021-05-02 23:19:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 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 23:19:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-05-02 23:19:42,499 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2021-05-02 23:19:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:42,499 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-05-02 23:19:42,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 102 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-05-02 23:19:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:19:42,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:42,500 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:42,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:19:42,500 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash -240916617, now seen corresponding path program 100 times [2021-05-02 23:19:42,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:42,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906313664] [2021-05-02 23:19:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:42,503 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:42,504 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:46,630 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 23:19:46,630 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906313664] [2021-05-02 23:19:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906313664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:46,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:46,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:19:46,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683106897] [2021-05-02 23:19:46,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:19:46,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:19:46,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:46,632 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:48,591 INFO L93 Difference]: Finished difference Result 635 states and 736 transitions. [2021-05-02 23:19:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 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 220 [2021-05-02 23:19:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:48,593 INFO L225 Difference]: With dead ends: 635 [2021-05-02 23:19:48,593 INFO L226 Difference]: Without dead ends: 621 [2021-05-02 23:19:48,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4031.9ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-02 23:19:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 223. [2021-05-02 23:19:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 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 23:19:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2021-05-02 23:19:48,671 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2021-05-02 23:19:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:48,672 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2021-05-02 23:19:48,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2021-05-02 23:19:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 23:19:48,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:48,673 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:48,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:19:48,673 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1354980199, now seen corresponding path program 101 times [2021-05-02 23:19:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:48,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532983616] [2021-05-02 23:19:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:48,683 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:48,684 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:53,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:53,140 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 23:19:53,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:53,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532983616] [2021-05-02 23:19:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532983616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:19:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828685678] [2021-05-02 23:19:53,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:19:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:19:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:53,142 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:54,827 INFO L93 Difference]: Finished difference Result 641 states and 743 transitions. [2021-05-02 23:19:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:19:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 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 222 [2021-05-02 23:19:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:54,829 INFO L225 Difference]: With dead ends: 641 [2021-05-02 23:19:54,829 INFO L226 Difference]: Without dead ends: 627 [2021-05-02 23:19:54,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4358.9ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-05-02 23:19:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 225. [2021-05-02 23:19:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 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 23:19:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-05-02 23:19:54,921 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2021-05-02 23:19:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:54,921 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-05-02 23:19:54,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.038095238095238) internal successors, (214), 104 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-05-02 23:19:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-02 23:19:54,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:54,922 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:54,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:19:54,922 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1771741499, now seen corresponding path program 102 times [2021-05-02 23:19:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:54,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044373562] [2021-05-02 23:19:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:54,926 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:54,927 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:59,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:59,395 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 23:19:59,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044373562] [2021-05-02 23:19:59,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044373562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:59,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:59,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:19:59,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873172610] [2021-05-02 23:19:59,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:19:59,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:59,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:19:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:59,397 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:01,639 INFO L93 Difference]: Finished difference Result 647 states and 750 transitions. [2021-05-02 23:20:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:20:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 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 224 [2021-05-02 23:20:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:01,641 INFO L225 Difference]: With dead ends: 647 [2021-05-02 23:20:01,641 INFO L226 Difference]: Without dead ends: 633 [2021-05-02 23:20:01,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4365.7ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:20:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-05-02 23:20:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 227. [2021-05-02 23:20:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.009009009009009) internal successors, (224), 222 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 23:20:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2021-05-02 23:20:01,724 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2021-05-02 23:20:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:01,724 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2021-05-02 23:20:01,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0377358490566038) internal successors, (216), 105 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:01,724 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2021-05-02 23:20:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 23:20:01,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:01,725 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:01,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:20:01,725 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 74186077, now seen corresponding path program 103 times [2021-05-02 23:20:01,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:01,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954270094] [2021-05-02 23:20:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:01,731 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:01,732 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:06,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:06,552 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 23:20:06,553 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:06,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954270094] [2021-05-02 23:20:06,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [954270094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:06,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:06,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:20:06,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583500197] [2021-05-02 23:20:06,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:20:06,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:20:06,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:06,555 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:08,561 INFO L93 Difference]: Finished difference Result 653 states and 757 transitions. [2021-05-02 23:20:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:20:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 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 226 [2021-05-02 23:20:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:08,563 INFO L225 Difference]: With dead ends: 653 [2021-05-02 23:20:08,563 INFO L226 Difference]: Without dead ends: 639 [2021-05-02 23:20:08,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4705.0ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:20:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-05-02 23:20:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 229. [2021-05-02 23:20:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 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 23:20:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-05-02 23:20:08,659 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2021-05-02 23:20:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:08,659 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-05-02 23:20:08,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 106 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-05-02 23:20:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 23:20:08,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:08,660 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:08,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:20:08,660 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 810998015, now seen corresponding path program 104 times [2021-05-02 23:20:08,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:08,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000249746] [2021-05-02 23:20:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:08,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:08,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:13,668 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 23:20:13,668 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:13,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000249746] [2021-05-02 23:20:13,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000249746] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:13,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:13,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:20:13,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867880086] [2021-05-02 23:20:13,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:20:13,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:13,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:20:13,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:13,670 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:16,212 INFO L93 Difference]: Finished difference Result 659 states and 764 transitions. [2021-05-02 23:20:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:20:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 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 228 [2021-05-02 23:20:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:16,213 INFO L225 Difference]: With dead ends: 659 [2021-05-02 23:20:16,214 INFO L226 Difference]: Without dead ends: 645 [2021-05-02 23:20:16,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4855.4ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:20:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-05-02 23:20:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 231. [2021-05-02 23:20:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 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 23:20:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2021-05-02 23:20:16,293 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2021-05-02 23:20:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:16,293 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2021-05-02 23:20:16,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.037037037037037) internal successors, (220), 107 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2021-05-02 23:20:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:20:16,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:16,294 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:16,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:20:16,294 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 217666593, now seen corresponding path program 105 times [2021-05-02 23:20:16,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:16,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296445924] [2021-05-02 23:20:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:16,300 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:16,301 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:21,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:21,382 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 23:20:21,383 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296445924] [2021-05-02 23:20:21,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [296445924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:21,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:21,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:20:21,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213795503] [2021-05-02 23:20:21,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:20:21,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:20:21,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:21,385 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:23,855 INFO L93 Difference]: Finished difference Result 665 states and 771 transitions. [2021-05-02 23:20:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:20:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 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 230 [2021-05-02 23:20:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:23,858 INFO L225 Difference]: With dead ends: 665 [2021-05-02 23:20:23,858 INFO L226 Difference]: Without dead ends: 651 [2021-05-02 23:20:23,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4964.7ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:20:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-05-02 23:20:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 233. [2021-05-02 23:20:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 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 23:20:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-05-02 23:20:23,939 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 230 [2021-05-02 23:20:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:23,939 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-05-02 23:20:23,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.036697247706422) internal successors, (222), 108 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-05-02 23:20:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-02 23:20:23,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:23,940 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:23,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:20:23,940 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1256820419, now seen corresponding path program 106 times [2021-05-02 23:20:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:23,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875208402] [2021-05-02 23:20:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:23,946 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:23,946 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:29,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:29,242 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 23:20:29,242 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:29,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875208402] [2021-05-02 23:20:29,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875208402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:29,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:29,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:20:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702174391] [2021-05-02 23:20:29,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:20:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:20:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:20:29,244 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:31,358 INFO L93 Difference]: Finished difference Result 671 states and 778 transitions. [2021-05-02 23:20:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:20:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 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 232 [2021-05-02 23:20:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:31,360 INFO L225 Difference]: With dead ends: 671 [2021-05-02 23:20:31,360 INFO L226 Difference]: Without dead ends: 657 [2021-05-02 23:20:31,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5162.2ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:20:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-02 23:20:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 235. [2021-05-02 23:20:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 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 23:20:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2021-05-02 23:20:31,451 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2021-05-02 23:20:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:31,451 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2021-05-02 23:20:31,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.036363636363636) internal successors, (224), 109 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2021-05-02 23:20:31,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 23:20:31,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:31,452 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:31,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:20:31,452 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash -843732763, now seen corresponding path program 107 times [2021-05-02 23:20:31,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:31,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261781108] [2021-05-02 23:20:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:31,456 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:31,457 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:36,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:36,911 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 23:20:36,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:36,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261781108] [2021-05-02 23:20:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [261781108] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:20:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566026733] [2021-05-02 23:20:36,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:20:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:20:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:20:36,914 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:39,324 INFO L93 Difference]: Finished difference Result 677 states and 785 transitions. [2021-05-02 23:20:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:20:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 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 234 [2021-05-02 23:20:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:39,326 INFO L225 Difference]: With dead ends: 677 [2021-05-02 23:20:39,326 INFO L226 Difference]: Without dead ends: 663 [2021-05-02 23:20:39,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5341.3ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:20:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-02 23:20:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 237. [2021-05-02 23:20:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 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 23:20:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-05-02 23:20:39,414 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2021-05-02 23:20:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:39,414 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-05-02 23:20:39,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.036036036036036) internal successors, (226), 110 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-05-02 23:20:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 23:20:39,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:39,415 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:39,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:20:39,415 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash -840711545, now seen corresponding path program 108 times [2021-05-02 23:20:39,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:39,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653629106] [2021-05-02 23:20:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:39,420 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:39,420 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,257 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 23:20:45,258 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:45,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653629106] [2021-05-02 23:20:45,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653629106] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:45,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:45,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:20:45,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91051039] [2021-05-02 23:20:45,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:20:45,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:20:45,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:45,260 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:48,371 INFO L93 Difference]: Finished difference Result 683 states and 792 transitions. [2021-05-02 23:20:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:20:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 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 236 [2021-05-02 23:20:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:48,373 INFO L225 Difference]: With dead ends: 683 [2021-05-02 23:20:48,373 INFO L226 Difference]: Without dead ends: 669 [2021-05-02 23:20:48,374 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5694.4ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:20:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-05-02 23:20:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 239. [2021-05-02 23:20:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 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 23:20:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2021-05-02 23:20:48,463 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 236 [2021-05-02 23:20:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:48,463 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2021-05-02 23:20:48,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0357142857142856) internal successors, (228), 111 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2021-05-02 23:20:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 23:20:48,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:48,464 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:48,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:20:48,464 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2062678953, now seen corresponding path program 109 times [2021-05-02 23:20:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:48,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126486011] [2021-05-02 23:20:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:48,472 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:48,473 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:54,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:54,621 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 23:20:54,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:54,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126486011] [2021-05-02 23:20:54,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126486011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:54,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:54,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:20:54,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305761041] [2021-05-02 23:20:54,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:20:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:54,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:20:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:54,623 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:57,461 INFO L93 Difference]: Finished difference Result 689 states and 799 transitions. [2021-05-02 23:20:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:20:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 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 238 [2021-05-02 23:20:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:57,463 INFO L225 Difference]: With dead ends: 689 [2021-05-02 23:20:57,463 INFO L226 Difference]: Without dead ends: 675 [2021-05-02 23:20:57,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6000.7ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:57,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-05-02 23:20:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 241. [2021-05-02 23:20:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 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 23:20:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-05-02 23:20:57,558 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 238 [2021-05-02 23:20:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:57,570 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-05-02 23:20:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 112 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-05-02 23:20:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 23:20:57,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:57,575 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:57,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:20:57,575 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:57,576 INFO L82 PathProgramCache]: Analyzing trace with hash 492205131, now seen corresponding path program 110 times [2021-05-02 23:20:57,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:57,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288442028] [2021-05-02 23:20:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:57,583 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:57,584 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:04,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:04,145 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 23:21:04,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288442028] [2021-05-02 23:21:04,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [288442028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:04,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:04,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:21:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025129034] [2021-05-02 23:21:04,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:21:04,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:04,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:21:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:04,148 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:06,912 INFO L93 Difference]: Finished difference Result 695 states and 806 transitions. [2021-05-02 23:21:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:21:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 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 240 [2021-05-02 23:21:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:06,915 INFO L225 Difference]: With dead ends: 695 [2021-05-02 23:21:06,916 INFO L226 Difference]: Without dead ends: 681 [2021-05-02 23:21:06,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 6426.2ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:21:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-05-02 23:21:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 243. [2021-05-02 23:21:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 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 23:21:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2021-05-02 23:21:07,032 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2021-05-02 23:21:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:07,032 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2021-05-02 23:21:07,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0350877192982457) internal successors, (232), 113 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2021-05-02 23:21:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 23:21:07,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:07,033 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:07,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:21:07,033 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1199616915, now seen corresponding path program 111 times [2021-05-02 23:21:07,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:07,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438499586] [2021-05-02 23:21:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:07,037 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:07,038 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:13,306 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 23:21:13,306 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438499586] [2021-05-02 23:21:13,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [438499586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:13,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:13,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:21:13,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857317581] [2021-05-02 23:21:13,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:21:13,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:21:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:21:13,308 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:16,655 INFO L93 Difference]: Finished difference Result 701 states and 813 transitions. [2021-05-02 23:21:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:21:16,656 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 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 242 [2021-05-02 23:21:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:16,657 INFO L225 Difference]: With dead ends: 701 [2021-05-02 23:21:16,657 INFO L226 Difference]: Without dead ends: 687 [2021-05-02 23:21:16,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6123.0ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:21:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-02 23:21:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 245. [2021-05-02 23:21:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 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 23:21:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-05-02 23:21:16,778 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2021-05-02 23:21:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:16,779 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-05-02 23:21:16,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.034782608695652) internal successors, (234), 114 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-05-02 23:21:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 23:21:16,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:16,780 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:16,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:21:16,780 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash 752002063, now seen corresponding path program 112 times [2021-05-02 23:21:16,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:16,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028849220] [2021-05-02 23:21:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:16,785 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:16,787 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:23,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:23,487 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 23:21:23,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028849220] [2021-05-02 23:21:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028849220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:23,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:21:23,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205539748] [2021-05-02 23:21:23,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:21:23,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:23,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:21:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:21:23,489 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:27,237 INFO L93 Difference]: Finished difference Result 707 states and 820 transitions. [2021-05-02 23:21:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:21:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 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 244 [2021-05-02 23:21:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:27,240 INFO L225 Difference]: With dead ends: 707 [2021-05-02 23:21:27,240 INFO L226 Difference]: Without dead ends: 693 [2021-05-02 23:21:27,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6564.9ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:21:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-05-02 23:21:27,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 247. [2021-05-02 23:21:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 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 23:21:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2021-05-02 23:21:27,378 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 244 [2021-05-02 23:21:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:27,378 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2021-05-02 23:21:27,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0344827586206895) internal successors, (236), 115 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2021-05-02 23:21:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:21:27,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:27,379 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:27,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:21:27,379 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -642868431, now seen corresponding path program 113 times [2021-05-02 23:21:27,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:27,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077837285] [2021-05-02 23:21:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:27,393 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:27,394 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:34,133 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 23:21:34,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:34,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077837285] [2021-05-02 23:21:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077837285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:34,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:34,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:21:34,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044402750] [2021-05-02 23:21:34,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:21:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:34,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:21:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:21:34,135 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:37,205 INFO L93 Difference]: Finished difference Result 713 states and 827 transitions. [2021-05-02 23:21:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:21:37,206 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 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 246 [2021-05-02 23:21:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:37,208 INFO L225 Difference]: With dead ends: 713 [2021-05-02 23:21:37,208 INFO L226 Difference]: Without dead ends: 699 [2021-05-02 23:21:37,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6518.4ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:21:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-05-02 23:21:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 249. [2021-05-02 23:21:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 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 23:21:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-05-02 23:21:37,318 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 246 [2021-05-02 23:21:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:37,318 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-05-02 23:21:37,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.034188034188034) internal successors, (238), 116 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-05-02 23:21:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-02 23:21:37,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:37,319 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:37,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:21:37,319 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1083616813, now seen corresponding path program 114 times [2021-05-02 23:21:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:37,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723603363] [2021-05-02 23:21:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:37,324 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:37,325 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:44,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:44,369 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 23:21:44,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:44,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723603363] [2021-05-02 23:21:44,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [723603363] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:44,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:44,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:21:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171842103] [2021-05-02 23:21:44,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:21:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:21:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:21:44,372 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:47,371 INFO L93 Difference]: Finished difference Result 719 states and 834 transitions. [2021-05-02 23:21:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:21:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 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 248 [2021-05-02 23:21:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:47,374 INFO L225 Difference]: With dead ends: 719 [2021-05-02 23:21:47,374 INFO L226 Difference]: Without dead ends: 705 [2021-05-02 23:21:47,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 6900.5ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:21:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-02 23:21:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 251. [2021-05-02 23:21:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.008130081300813) internal successors, (248), 246 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 23:21:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2021-05-02 23:21:47,477 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2021-05-02 23:21:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:47,477 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2021-05-02 23:21:47,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0338983050847457) internal successors, (240), 117 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2021-05-02 23:21:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:21:47,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:47,478 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:47,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:21:47,479 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash 558950389, now seen corresponding path program 115 times [2021-05-02 23:21:47,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:47,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739728151] [2021-05-02 23:21:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:47,485 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:47,486 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:54,841 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 23:21:54,841 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739728151] [2021-05-02 23:21:54,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [739728151] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:54,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:54,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:21:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721449601] [2021-05-02 23:21:54,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:21:54,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:21:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:21:54,843 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:58,181 INFO L93 Difference]: Finished difference Result 725 states and 841 transitions. [2021-05-02 23:21:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:21:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 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 250 [2021-05-02 23:21:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:58,183 INFO L225 Difference]: With dead ends: 725 [2021-05-02 23:21:58,183 INFO L226 Difference]: Without dead ends: 711 [2021-05-02 23:21:58,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 7200.4ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:21:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-05-02 23:21:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 253. [2021-05-02 23:21:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 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 23:21:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-05-02 23:21:58,289 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2021-05-02 23:21:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:58,290 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-05-02 23:21:58,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.033613445378151) internal successors, (242), 118 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-05-02 23:21:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 23:21:58,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:58,291 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:58,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:21:58,291 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1481933417, now seen corresponding path program 116 times [2021-05-02 23:21:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195393379] [2021-05-02 23:21:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:58,296 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:58,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:06,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:06,005 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 23:22:06,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:06,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195393379] [2021-05-02 23:22:06,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [195393379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:06,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:06,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:22:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139884492] [2021-05-02 23:22:06,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:22:06,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:22:06,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:22:06,007 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:10,224 INFO L93 Difference]: Finished difference Result 731 states and 848 transitions. [2021-05-02 23:22:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:22:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 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 252 [2021-05-02 23:22:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:10,227 INFO L225 Difference]: With dead ends: 731 [2021-05-02 23:22:10,227 INFO L226 Difference]: Without dead ends: 717 [2021-05-02 23:22:10,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 7548.3ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:22:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-05-02 23:22:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 255. [2021-05-02 23:22:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.008) internal successors, (252), 250 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 23:22:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2021-05-02 23:22:10,344 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 252 [2021-05-02 23:22:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:10,344 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2021-05-02 23:22:10,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.033333333333333) internal successors, (244), 119 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2021-05-02 23:22:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-02 23:22:10,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:10,345 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:10,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:22:10,346 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash 28783289, now seen corresponding path program 117 times [2021-05-02 23:22:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888582505] [2021-05-02 23:22:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:10,350 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:10,351 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:18,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:18,280 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 23:22:18,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:18,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888582505] [2021-05-02 23:22:18,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [888582505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:18,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:18,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:22:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772836952] [2021-05-02 23:22:18,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:22:18,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:22:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:22:18,283 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:21,845 INFO L93 Difference]: Finished difference Result 737 states and 855 transitions. [2021-05-02 23:22:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:22:21,846 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 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 254 [2021-05-02 23:22:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:21,848 INFO L225 Difference]: With dead ends: 737 [2021-05-02 23:22:21,848 INFO L226 Difference]: Without dead ends: 723 [2021-05-02 23:22:21,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7772.8ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:22:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-05-02 23:22:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 257. [2021-05-02 23:22:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 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 23:22:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2021-05-02 23:22:21,958 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 254 [2021-05-02 23:22:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:21,958 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2021-05-02 23:22:21,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0330578512396693) internal successors, (246), 120 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2021-05-02 23:22:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-02 23:22:21,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:21,959 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:21,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:22:21,960 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash 128591707, now seen corresponding path program 118 times [2021-05-02 23:22:21,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:21,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172638324] [2021-05-02 23:22:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:21,965 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:21,966 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:30,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:30,664 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 23:22:30,664 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:30,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172638324] [2021-05-02 23:22:30,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [172638324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:30,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:30,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:22:30,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229312090] [2021-05-02 23:22:30,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:22:30,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:22:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:22:30,667 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:35,176 INFO L93 Difference]: Finished difference Result 743 states and 862 transitions. [2021-05-02 23:22:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:22:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 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 256 [2021-05-02 23:22:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:35,178 INFO L225 Difference]: With dead ends: 743 [2021-05-02 23:22:35,178 INFO L226 Difference]: Without dead ends: 729 [2021-05-02 23:22:35,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 8519.8ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:22:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-05-02 23:22:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 259. [2021-05-02 23:22:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 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 23:22:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2021-05-02 23:22:35,291 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2021-05-02 23:22:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:35,291 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2021-05-02 23:22:35,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0327868852459017) internal successors, (248), 121 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2021-05-02 23:22:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 23:22:35,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:35,292 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:35,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:22:35,292 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1555200893, now seen corresponding path program 119 times [2021-05-02 23:22:35,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:35,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107852282] [2021-05-02 23:22:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:35,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:35,300 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:44,378 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 23:22:44,378 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:44,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107852282] [2021-05-02 23:22:44,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2107852282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:44,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:44,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:22:44,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351810323] [2021-05-02 23:22:44,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:22:44,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:22:44,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:22:44,381 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:47,667 INFO L93 Difference]: Finished difference Result 749 states and 869 transitions. [2021-05-02 23:22:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:22:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 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 258 [2021-05-02 23:22:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:47,670 INFO L225 Difference]: With dead ends: 749 [2021-05-02 23:22:47,670 INFO L226 Difference]: Without dead ends: 735 [2021-05-02 23:22:47,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 8918.7ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:22:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-05-02 23:22:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 261. [2021-05-02 23:22:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.0078125) internal successors, (258), 256 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 23:22:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-05-02 23:22:47,798 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2021-05-02 23:22:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:47,798 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-05-02 23:22:47,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-05-02 23:22:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:22:47,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:47,799 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:47,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:22:47,799 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:47,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:47,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1862906081, now seen corresponding path program 120 times [2021-05-02 23:22:47,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:47,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957132993] [2021-05-02 23:22:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:47,804 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:47,805 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:57,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:57,421 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 23:22:57,422 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957132993] [2021-05-02 23:22:57,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [957132993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:57,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:57,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:22:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55897423] [2021-05-02 23:22:57,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:22:57,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:22:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:22:57,424 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:01,732 INFO L93 Difference]: Finished difference Result 755 states and 876 transitions. [2021-05-02 23:23:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:23:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 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 260 [2021-05-02 23:23:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:01,735 INFO L225 Difference]: With dead ends: 755 [2021-05-02 23:23:01,735 INFO L226 Difference]: Without dead ends: 741 [2021-05-02 23:23:01,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 9441.7ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:23:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-02 23:23:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 263. [2021-05-02 23:23:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0077519379844961) internal successors, (260), 258 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 23:23:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2021-05-02 23:23:01,869 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 260 [2021-05-02 23:23:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:01,869 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2021-05-02 23:23:01,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.032258064516129) internal successors, (252), 123 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2021-05-02 23:23:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-02 23:23:01,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:01,870 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:01,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:23:01,870 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1013726655, now seen corresponding path program 121 times [2021-05-02 23:23:01,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:01,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000052699] [2021-05-02 23:23:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:01,876 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:01,877 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:12,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:12,585 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 23:23:12,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000052699] [2021-05-02 23:23:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2000052699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:12,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:12,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:23:12,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660647404] [2021-05-02 23:23:12,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:23:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:12,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:23:12,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:23:12,587 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:16,248 INFO L93 Difference]: Finished difference Result 761 states and 883 transitions. [2021-05-02 23:23:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:23:16,250 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 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 262 [2021-05-02 23:23:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:16,252 INFO L225 Difference]: With dead ends: 761 [2021-05-02 23:23:16,252 INFO L226 Difference]: Without dead ends: 747 [2021-05-02 23:23:16,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 10520.2ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:23:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2021-05-02 23:23:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 265. [2021-05-02 23:23:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 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 23:23:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-05-02 23:23:16,375 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 262 [2021-05-02 23:23:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:16,375 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-05-02 23:23:16,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 124 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-05-02 23:23:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 23:23:16,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:16,376 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:16,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:23:16,376 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -996084509, now seen corresponding path program 122 times [2021-05-02 23:23:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757723620] [2021-05-02 23:23:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:16,382 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:16,383 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:27,281 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 23:23:27,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:27,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757723620] [2021-05-02 23:23:27,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [757723620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:27,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:27,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:23:27,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324546172] [2021-05-02 23:23:27,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:23:27,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:27,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:23:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:23:27,284 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:32,019 INFO L93 Difference]: Finished difference Result 767 states and 890 transitions. [2021-05-02 23:23:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:23:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 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 264 [2021-05-02 23:23:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:32,022 INFO L225 Difference]: With dead ends: 767 [2021-05-02 23:23:32,023 INFO L226 Difference]: Without dead ends: 753 [2021-05-02 23:23:32,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 10704.4ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:23:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-05-02 23:23:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 267. [2021-05-02 23:23:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 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 23:23:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2021-05-02 23:23:32,159 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2021-05-02 23:23:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:32,159 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2021-05-02 23:23:32,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0317460317460316) internal successors, (256), 125 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2021-05-02 23:23:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 23:23:32,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:32,160 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:32,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:23:32,160 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1221851387, now seen corresponding path program 123 times [2021-05-02 23:23:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:32,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361424458] [2021-05-02 23:23:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:32,167 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:32,169 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:44,211 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 23:23:44,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361424458] [2021-05-02 23:23:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [361424458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:44,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:23:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386971756] [2021-05-02 23:23:44,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:23:44,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:44,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:23:44,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:23:44,214 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:48,116 INFO L93 Difference]: Finished difference Result 773 states and 897 transitions. [2021-05-02 23:23:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:23:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 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 266 [2021-05-02 23:23:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:48,120 INFO L225 Difference]: With dead ends: 773 [2021-05-02 23:23:48,120 INFO L226 Difference]: Without dead ends: 759 [2021-05-02 23:23:48,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 11851.8ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:23:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-02 23:23:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 269. [2021-05-02 23:23:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 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 23:23:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-02 23:23:48,261 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2021-05-02 23:23:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:48,261 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-02 23:23:48,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.031496062992126) internal successors, (258), 126 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-02 23:23:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 23:23:48,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:48,262 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:48,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:23:48,262 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 859510951, now seen corresponding path program 124 times [2021-05-02 23:23:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:48,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880359820] [2021-05-02 23:23:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:48,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:48,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:00,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:00,370 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 23:24:00,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:00,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880359820] [2021-05-02 23:24:00,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [880359820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:00,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:00,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:24:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698109998] [2021-05-02 23:24:00,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:24:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:24:00,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:24:00,373 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:05,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:05,756 INFO L93 Difference]: Finished difference Result 779 states and 904 transitions. [2021-05-02 23:24:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:24:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 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 268 [2021-05-02 23:24:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:05,760 INFO L225 Difference]: With dead ends: 779 [2021-05-02 23:24:05,760 INFO L226 Difference]: Without dead ends: 765 [2021-05-02 23:24:05,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 11900.7ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:24:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-05-02 23:24:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 271. [2021-05-02 23:24:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 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 23:24:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2021-05-02 23:24:05,890 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 268 [2021-05-02 23:24:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:05,890 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2021-05-02 23:24:05,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.03125) internal successors, (260), 127 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2021-05-02 23:24:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:24:05,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:05,891 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:05,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:24:05,891 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -406042167, now seen corresponding path program 125 times [2021-05-02 23:24:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:05,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525718078] [2021-05-02 23:24:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:05,898 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:05,899 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:18,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:18,882 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 23:24:18,883 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:18,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525718078] [2021-05-02 23:24:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1525718078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:18,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:18,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:24:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476705846] [2021-05-02 23:24:18,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:24:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:24:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:24:18,886 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:24,598 INFO L93 Difference]: Finished difference Result 785 states and 911 transitions. [2021-05-02 23:24:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:24:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 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 270 [2021-05-02 23:24:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:24,602 INFO L225 Difference]: With dead ends: 785 [2021-05-02 23:24:24,602 INFO L226 Difference]: Without dead ends: 771 [2021-05-02 23:24:24,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 12773.8ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:24:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-05-02 23:24:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 273. [2021-05-02 23:24:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 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 23:24:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2021-05-02 23:24:24,736 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 270 [2021-05-02 23:24:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:24,736 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2021-05-02 23:24:24,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0310077519379846) internal successors, (262), 128 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2021-05-02 23:24:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-02 23:24:24,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:24,737 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:24,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:24:24,737 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1126843797, now seen corresponding path program 126 times [2021-05-02 23:24:24,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:24,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082209387] [2021-05-02 23:24:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:24,744 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:24,745 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:38,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:38,332 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 23:24:38,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:38,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082209387] [2021-05-02 23:24:38,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082209387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:38,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:38,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:24:38,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698610078] [2021-05-02 23:24:38,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:24:38,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:38,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:24:38,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:24:38,335 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:43,240 INFO L93 Difference]: Finished difference Result 791 states and 918 transitions. [2021-05-02 23:24:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:24:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 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 272 [2021-05-02 23:24:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:43,244 INFO L225 Difference]: With dead ends: 791 [2021-05-02 23:24:43,244 INFO L226 Difference]: Without dead ends: 777 [2021-05-02 23:24:43,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 13379.3ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:24:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-05-02 23:24:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 275. [2021-05-02 23:24:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 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 23:24:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2021-05-02 23:24:43,381 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2021-05-02 23:24:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:43,381 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2021-05-02 23:24:43,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0307692307692307) internal successors, (264), 129 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2021-05-02 23:24:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:24:43,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:43,382 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:43,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:24:43,383 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1967491725, now seen corresponding path program 127 times [2021-05-02 23:24:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:43,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403879715] [2021-05-02 23:24:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:43,396 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:43,397 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:57,482 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 23:24:57,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:57,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403879715] [2021-05-02 23:24:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [403879715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:24:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546535039] [2021-05-02 23:24:57,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:24:57,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:57,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:24:57,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:24:57,484 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:02,243 INFO L93 Difference]: Finished difference Result 797 states and 925 transitions. [2021-05-02 23:25:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:25:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 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 274 [2021-05-02 23:25:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:02,248 INFO L225 Difference]: With dead ends: 797 [2021-05-02 23:25:02,248 INFO L226 Difference]: Without dead ends: 783 [2021-05-02 23:25:02,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 13868.1ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:25:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-05-02 23:25:02,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 277. [2021-05-02 23:25:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 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 23:25:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-05-02 23:25:02,398 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2021-05-02 23:25:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:02,398 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-05-02 23:25:02,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.030534351145038) internal successors, (266), 130 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-05-02 23:25:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 23:25:02,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:02,399 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:02,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:25:02,399 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:02,399 INFO L82 PathProgramCache]: Analyzing trace with hash -788407761, now seen corresponding path program 128 times [2021-05-02 23:25:02,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:02,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048753698] [2021-05-02 23:25:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:02,408 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:02,410 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:18,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:18,495 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 23:25:18,495 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:18,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048753698] [2021-05-02 23:25:18,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048753698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:18,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:18,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:25:18,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896979309] [2021-05-02 23:25:18,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:25:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:25:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:25:18,498 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:23,836 INFO L93 Difference]: Finished difference Result 803 states and 932 transitions. [2021-05-02 23:25:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:25:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 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 276 [2021-05-02 23:25:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:23,841 INFO L225 Difference]: With dead ends: 803 [2021-05-02 23:25:23,841 INFO L226 Difference]: Without dead ends: 789 [2021-05-02 23:25:23,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 15822.5ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:25:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-05-02 23:25:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 279. [2021-05-02 23:25:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 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 23:25:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2021-05-02 23:25:23,989 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 276 [2021-05-02 23:25:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:23,989 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2021-05-02 23:25:23,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0303030303030303) internal successors, (268), 131 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2021-05-02 23:25:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-02 23:25:23,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:23,990 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:23,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:25:23,990 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 787007825, now seen corresponding path program 129 times [2021-05-02 23:25:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:23,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799931760] [2021-05-02 23:25:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:23,997 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:24,001 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:40,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:40,938 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 23:25:40,939 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:40,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799931760] [2021-05-02 23:25:40,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1799931760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:40,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:40,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:25:40,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60442020] [2021-05-02 23:25:40,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:25:40,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:25:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:40,942 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:46,568 INFO L93 Difference]: Finished difference Result 809 states and 939 transitions. [2021-05-02 23:25:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:25:46,570 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 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 278 [2021-05-02 23:25:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:46,572 INFO L225 Difference]: With dead ends: 809 [2021-05-02 23:25:46,572 INFO L226 Difference]: Without dead ends: 795 [2021-05-02 23:25:46,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 16681.8ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:25:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-05-02 23:25:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 281. [2021-05-02 23:25:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 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 23:25:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2021-05-02 23:25:46,731 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 278 [2021-05-02 23:25:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:46,732 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2021-05-02 23:25:46,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.030075187969925) internal successors, (270), 132 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2021-05-02 23:25:46,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-02 23:25:46,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:46,733 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:46,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:25:46,733 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1362069517, now seen corresponding path program 130 times [2021-05-02 23:25:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792778653] [2021-05-02 23:25:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:46,740 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:46,742 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:03,997 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 23:26:03,997 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:03,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792778653] [2021-05-02 23:26:03,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [792778653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:03,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:03,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:26:03,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567128298] [2021-05-02 23:26:03,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:26:03,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:03,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:26:03,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:26:04,000 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:09,550 INFO L93 Difference]: Finished difference Result 815 states and 946 transitions. [2021-05-02 23:26:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:26:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 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 280 [2021-05-02 23:26:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:09,557 INFO L225 Difference]: With dead ends: 815 [2021-05-02 23:26:09,557 INFO L226 Difference]: Without dead ends: 801 [2021-05-02 23:26:09,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 16988.1ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:26:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-05-02 23:26:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 283. [2021-05-02 23:26:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 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 23:26:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2021-05-02 23:26:09,741 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2021-05-02 23:26:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:09,741 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2021-05-02 23:26:09,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.029850746268657) internal successors, (272), 133 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2021-05-02 23:26:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-02 23:26:09,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:09,743 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:09,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:26:09,743 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -746125803, now seen corresponding path program 131 times [2021-05-02 23:26:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:09,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937640919] [2021-05-02 23:26:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:09,750 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:09,751 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:27,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:27,677 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 23:26:27,677 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:27,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937640919] [2021-05-02 23:26:27,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937640919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:27,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:27,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:26:27,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211972956] [2021-05-02 23:26:27,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:26:27,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:27,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:26:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:26:27,680 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:33,118 INFO L93 Difference]: Finished difference Result 821 states and 953 transitions. [2021-05-02 23:26:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:26:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 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 282 [2021-05-02 23:26:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:33,122 INFO L225 Difference]: With dead ends: 821 [2021-05-02 23:26:33,122 INFO L226 Difference]: Without dead ends: 807 [2021-05-02 23:26:33,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 17664.1ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:26:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-05-02 23:26:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 285. [2021-05-02 23:26:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 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 23:26:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-05-02 23:26:33,304 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2021-05-02 23:26:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:33,304 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-05-02 23:26:33,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 134 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-05-02 23:26:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-02 23:26:33,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:33,305 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:33,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:26:33,306 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:33,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1529703497, now seen corresponding path program 132 times [2021-05-02 23:26:33,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:33,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043369466] [2021-05-02 23:26:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:33,313 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:33,314 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:52,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:52,164 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 23:26:52,164 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:52,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043369466] [2021-05-02 23:26:52,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043369466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:52,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:52,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:26:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583281713] [2021-05-02 23:26:52,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:26:52,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:52,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:26:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:26:52,167 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:00,236 INFO L93 Difference]: Finished difference Result 827 states and 960 transitions. [2021-05-02 23:27:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:27:00,239 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 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 284 [2021-05-02 23:27:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:00,241 INFO L225 Difference]: With dead ends: 827 [2021-05-02 23:27:00,241 INFO L226 Difference]: Without dead ends: 813 [2021-05-02 23:27:00,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 18556.5ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:27:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-05-02 23:27:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 287. [2021-05-02 23:27:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0070921985815602) internal successors, (284), 282 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 23:27:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2021-05-02 23:27:00,400 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 284 [2021-05-02 23:27:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:00,400 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2021-05-02 23:27:00,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 135 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2021-05-02 23:27:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-02 23:27:00,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:00,402 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:00,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:27:00,402 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1366376665, now seen corresponding path program 133 times [2021-05-02 23:27:00,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:00,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295519967] [2021-05-02 23:27:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:00,408 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:00,410 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:19,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:19,816 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 23:27:19,816 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:19,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295519967] [2021-05-02 23:27:19,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1295519967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:19,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:19,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-02 23:27:19,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53437491] [2021-05-02 23:27:19,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 23:27:19,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:19,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 23:27:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:27:19,819 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:27,518 INFO L93 Difference]: Finished difference Result 833 states and 967 transitions. [2021-05-02 23:27:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-02 23:27:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 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 286 [2021-05-02 23:27:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:27,524 INFO L225 Difference]: With dead ends: 833 [2021-05-02 23:27:27,524 INFO L226 Difference]: Without dead ends: 819 [2021-05-02 23:27:27,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 19133.8ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:27:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-05-02 23:27:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 289. [2021-05-02 23:27:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 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 23:27:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-05-02 23:27:27,700 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 286 [2021-05-02 23:27:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:27,700 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-05-02 23:27:27,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 136 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-05-02 23:27:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-02 23:27:27,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:27,702 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:27,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:27:27,702 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1360604539, now seen corresponding path program 134 times [2021-05-02 23:27:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:27,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434233602] [2021-05-02 23:27:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:27,709 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:27,710 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:48,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:48,060 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 23:27:48,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:48,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434233602] [2021-05-02 23:27:48,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [434233602] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-02 23:27:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509677918] [2021-05-02 23:27:48,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 23:27:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 23:27:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:27:48,063 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:55,645 INFO L93 Difference]: Finished difference Result 839 states and 974 transitions. [2021-05-02 23:27:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 23:27:55,648 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 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 288 [2021-05-02 23:27:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:55,650 INFO L225 Difference]: With dead ends: 839 [2021-05-02 23:27:55,650 INFO L226 Difference]: Without dead ends: 825 [2021-05-02 23:27:55,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 20047.8ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:27:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-05-02 23:27:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 291. [2021-05-02 23:27:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.006993006993007) internal successors, (288), 286 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 23:27:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2021-05-02 23:27:55,813 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2021-05-02 23:27:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:55,813 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2021-05-02 23:27:55,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.028985507246377) internal successors, (280), 137 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2021-05-02 23:27:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 23:27:55,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:55,814 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:55,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:27:55,814 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 108558749, now seen corresponding path program 135 times [2021-05-02 23:27:55,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:55,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703963880] [2021-05-02 23:27:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:55,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:55,823 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:17,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:17,570 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 23:28:17,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:17,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703963880] [2021-05-02 23:28:17,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703963880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:17,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:17,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-02 23:28:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971436860] [2021-05-02 23:28:17,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 23:28:17,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 23:28:17,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:17,573 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:24,520 INFO L93 Difference]: Finished difference Result 845 states and 981 transitions. [2021-05-02 23:28:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-02 23:28:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 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 290 [2021-05-02 23:28:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:24,525 INFO L225 Difference]: With dead ends: 845 [2021-05-02 23:28:24,525 INFO L226 Difference]: Without dead ends: 831 [2021-05-02 23:28:24,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 21426.4ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:28:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-05-02 23:28:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 293. [2021-05-02 23:28:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 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 23:28:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2021-05-02 23:28:24,704 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2021-05-02 23:28:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:24,704 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2021-05-02 23:28:24,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.028776978417266) internal successors, (282), 138 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2021-05-02 23:28:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-02 23:28:24,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:24,706 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:24,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-02 23:28:24,706 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -516602561, now seen corresponding path program 136 times [2021-05-02 23:28:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829530119] [2021-05-02 23:28:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:24,714 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:24,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:37,584 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 23:28:37,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829530119] [2021-05-02 23:28:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [829530119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-02 23:28:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389017007] [2021-05-02 23:28:37,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 23:28:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 23:28:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:28:37,587 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:43,304 INFO L93 Difference]: Finished difference Result 851 states and 988 transitions. [2021-05-02 23:28:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 23:28:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 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 292 [2021-05-02 23:28:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:43,307 INFO L225 Difference]: With dead ends: 851 [2021-05-02 23:28:43,307 INFO L226 Difference]: Without dead ends: 837 [2021-05-02 23:28:43,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 12630.7ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:28:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-05-02 23:28:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 295. [2021-05-02 23:28:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 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 23:28:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2021-05-02 23:28:43,484 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 292 [2021-05-02 23:28:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:43,484 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2021-05-02 23:28:43,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0285714285714285) internal successors, (284), 139 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2021-05-02 23:28:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-02 23:28:43,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:43,485 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:43,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-02 23:28:43,486 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1200031, now seen corresponding path program 137 times [2021-05-02 23:28:43,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:43,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029226842] [2021-05-02 23:28:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:43,491 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:43,491 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:53,934 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 23:28:53,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:53,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029226842] [2021-05-02 23:28:53,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029226842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:53,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:53,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-02 23:28:53,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563030899] [2021-05-02 23:28:53,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 23:28:53,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 23:28:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:28:53,937 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:58,726 INFO L93 Difference]: Finished difference Result 857 states and 995 transitions. [2021-05-02 23:28:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 23:28:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 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 294 [2021-05-02 23:28:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:58,730 INFO L225 Difference]: With dead ends: 857 [2021-05-02 23:28:58,730 INFO L226 Difference]: Without dead ends: 843 [2021-05-02 23:28:58,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 10263.2ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:28:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-05-02 23:28:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 297. [2021-05-02 23:28:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 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 23:28:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2021-05-02 23:28:58,911 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 294 [2021-05-02 23:28:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:58,911 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2021-05-02 23:28:58,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.028368794326241) internal successors, (286), 140 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2021-05-02 23:28:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-02 23:28:58,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:58,912 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:58,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-02 23:28:58,912 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1379392259, now seen corresponding path program 138 times [2021-05-02 23:28:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541997276] [2021-05-02 23:28:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:58,918 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:58,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:11,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:11,701 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 23:29:11,701 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541997276] [2021-05-02 23:29:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541997276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:11,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:11,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-02 23:29:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853909752] [2021-05-02 23:29:11,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 23:29:11,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 23:29:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:29:11,703 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:18,464 INFO L93 Difference]: Finished difference Result 863 states and 1002 transitions. [2021-05-02 23:29:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-02 23:29:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 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 296 [2021-05-02 23:29:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:18,472 INFO L225 Difference]: With dead ends: 863 [2021-05-02 23:29:18,472 INFO L226 Difference]: Without dead ends: 849 [2021-05-02 23:29:18,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 12568.8ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:29:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-02 23:29:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 299. [2021-05-02 23:29:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 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 23:29:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2021-05-02 23:29:18,660 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2021-05-02 23:29:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:18,660 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2021-05-02 23:29:18,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.028169014084507) internal successors, (288), 141 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2021-05-02 23:29:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-02 23:29:18,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:18,661 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:18,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-02 23:29:18,661 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash 983688485, now seen corresponding path program 139 times [2021-05-02 23:29:18,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:18,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981610376] [2021-05-02 23:29:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:18,667 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:18,668 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,191 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 23:29:32,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:32,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981610376] [2021-05-02 23:29:32,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981610376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:32,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:32,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-02 23:29:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493236987] [2021-05-02 23:29:32,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-02 23:29:32,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-02 23:29:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:29:32,194 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:39,814 INFO L93 Difference]: Finished difference Result 869 states and 1009 transitions. [2021-05-02 23:29:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-02 23:29:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 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 298 [2021-05-02 23:29:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:39,816 INFO L225 Difference]: With dead ends: 869 [2021-05-02 23:29:39,816 INFO L226 Difference]: Without dead ends: 855 [2021-05-02 23:29:39,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 13302.6ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:29:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-05-02 23:29:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 301. [2021-05-02 23:29:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 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 23:29:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2021-05-02 23:29:39,988 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2021-05-02 23:29:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:39,989 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2021-05-02 23:29:39,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.027972027972028) internal successors, (290), 142 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2021-05-02 23:29:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-02 23:29:39,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:39,990 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:39,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:29:39,990 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1330516281, now seen corresponding path program 140 times [2021-05-02 23:29:39,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:39,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120974702] [2021-05-02 23:29:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:39,995 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:39,995 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat