/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_2-2-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:23:01,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:23:01,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:23:01,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:23:01,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:23:01,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:23:01,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:23:01,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:23:01,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:23:01,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:23:01,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:23:01,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:23:01,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:23:01,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:23:01,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:23:01,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:23:01,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:23:01,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:23:01,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:23:01,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:23:01,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:23:01,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:23:01,358 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:23:01,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:23:01,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:23:01,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:23:01,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:23:01,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:23:01,629 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:23:01,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2021-05-06 11:23:01,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cdc9c31/27e676b73df7455cb4273f2a25159651/FLAGc5923a28f [2021-05-06 11:23:02,304 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:23:02,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2-simple.i [2021-05-06 11:23:02,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cdc9c31/27e676b73df7455cb4273f2a25159651/FLAGc5923a28f [2021-05-06 11:23:02,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cdc9c31/27e676b73df7455cb4273f2a25159651 [2021-05-06 11:23:02,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:23:02,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:23:02,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:23:02,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:23:02,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:23:02,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2b1df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02, skipping insertion in model container [2021-05-06 11:23:02,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:23:02,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:23:02,808 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_2-2-simple.i[809,822] [2021-05-06 11:23:02,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:23:02,822 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:23:02,829 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_2-2-simple.i[809,822] [2021-05-06 11:23:02,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:23:02,841 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:23:02,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02 WrapperNode [2021-05-06 11:23:02,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:23:02,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:23:02,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:23:02,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:23:02,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (1/1) ... [2021-05-06 11:23:02,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:23:02,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:23:02,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:23:02,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:23:02,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (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 [2021-05-06 11:23:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:23:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:23:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:23:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:23:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:23:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:23:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:23:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:23:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:23:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:23:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:23:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:23:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:23:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:23:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:23:03,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:23:03,220 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:23:03,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:23:03 BoogieIcfgContainer [2021-05-06 11:23:03,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:23:03,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:23:03,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:23:03,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:23:03,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:23:02" (1/3) ... [2021-05-06 11:23:03,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382b0cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:23:03, skipping insertion in model container [2021-05-06 11:23:03,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:23:02" (2/3) ... [2021-05-06 11:23:03,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382b0cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:23:03, skipping insertion in model container [2021-05-06 11:23:03,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:23:03" (3/3) ... [2021-05-06 11:23:03,226 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2021-05-06 11:23:03,229 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:23:03,231 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:23:03,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:23:03,255 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:23:03,255 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:23:03,255 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:23:03,255 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:23:03,255 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:23:03,256 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:23:03,256 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:23:03,256 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:23:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-05-06 11:23:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:23:03,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,275 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2021-05-06 11:23:03,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092466388] [2021-05-06 11:23:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,331 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:03,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:03,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092466388] [2021-05-06 11:23:03,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092466388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:03,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:03,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:23:03,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131736317] [2021-05-06 11:23:03,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:23:03,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:23:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:23:03,533 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:03,577 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 11:23:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:23:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:23:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:03,582 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:23:03,583 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 11:23:03,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:23:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 11:23:03,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 11:23:03,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 11:23:03,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 11:23:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:03,606 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 11:23:03,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 11:23:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:23:03,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,606 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:23:03,607 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2021-05-06 11:23:03,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548072930] [2021-05-06 11:23:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,609 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:03,669 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:03,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548072930] [2021-05-06 11:23:03,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548072930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:03,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:03,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:23:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281401514] [2021-05-06 11:23:03,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:23:03,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:23:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:23:03,671 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:03,693 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 11:23:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:23:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:23:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:03,694 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:23:03,694 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 11:23:03,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:23:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 11:23:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-06 11:23:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 11:23:03,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-06 11:23:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:03,699 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 11:23:03,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 11:23:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:23:03,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,699 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:23:03,700 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2021-05-06 11:23:03,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180976835] [2021-05-06 11:23:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,713 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:03,713 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:03,714 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:03,779 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:03,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180976835] [2021-05-06 11:23:03,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180976835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:03,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:03,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:23:03,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157776553] [2021-05-06 11:23:03,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:23:03,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:23:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:23:03,780 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-05-06 11:23:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:03,805 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 11:23:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:23:03,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 [2021-05-06 11:23:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:03,806 INFO L225 Difference]: With dead ends: 24 [2021-05-06 11:23:03,806 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 11:23:03,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:23:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 11:23:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 11:23:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 11:23:03,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-06 11:23:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:03,810 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 11:23:03,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2021-05-06 11:23:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 11:23:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:23:03,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,811 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:23:03,811 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 2 times [2021-05-06 11:23:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023919056] [2021-05-06 11:23:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,816 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:03,816 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:03,817 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:03,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:03,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023919056] [2021-05-06 11:23:03,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023919056] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:03,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:03,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:23:03,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841384778] [2021-05-06 11:23:03,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:23:03,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:03,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:23:03,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:23:03,879 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-05-06 11:23:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:03,910 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 11:23:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:23:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2021-05-06 11:23:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:03,925 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:23:03,926 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 11:23:03,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:23:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 11:23:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-06 11:23:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2021-05-06 11:23:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 11:23:03,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-06 11:23:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:03,930 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 11:23:03,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-05-06 11:23:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 11:23:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:23:03,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,930 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:23:03,931 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 3 times [2021-05-06 11:23:03,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571948148] [2021-05-06 11:23:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,936 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:03,936 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:03,937 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,049 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571948148] [2021-05-06 11:23:04,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571948148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:23:04,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511901151] [2021-05-06 11:23:04,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:23:04,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:23:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:23:04,051 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,100 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 11:23:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:23:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have 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 [2021-05-06 11:23:04,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,101 INFO L225 Difference]: With dead ends: 28 [2021-05-06 11:23:04,101 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 11:23:04,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:23:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 11:23:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 11:23:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2021-05-06 11:23:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 11:23:04,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-06 11:23:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,105 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 11:23:04,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 11:23:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 11:23:04,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,106 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:23:04,106 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 4 times [2021-05-06 11:23:04,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219719827] [2021-05-06 11:23:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,111 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,111 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,112 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,171 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219719827] [2021-05-06 11:23:04,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [219719827] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:23:04,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453106972] [2021-05-06 11:23:04,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:23:04,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:23:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:23:04,172 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-05-06 11:23:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,223 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 11:23:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:23:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 20 [2021-05-06 11:23:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,223 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:23:04,224 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 11:23:04,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:23:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 11:23:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-06 11:23:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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) [2021-05-06 11:23:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 11:23:04,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-06 11:23:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,238 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 11:23:04,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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) [2021-05-06 11:23:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 11:23:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:23:04,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,239 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:23:04,239 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 5 times [2021-05-06 11:23:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041629295] [2021-05-06 11:23:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,249 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,250 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,250 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,357 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041629295] [2021-05-06 11:23:04,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041629295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:23:04,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952409776] [2021-05-06 11:23:04,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:23:04,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:23:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:23:04,359 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-05-06 11:23:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,396 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 11:23:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:23:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 22 [2021-05-06 11:23:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,397 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:23:04,397 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:23:04,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:23:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:23:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:23:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 11:23:04,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-06 11:23:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,401 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 11:23:04,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-05-06 11:23:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 11:23:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 11:23:04,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,401 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:23:04,401 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 6 times [2021-05-06 11:23:04,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737311442] [2021-05-06 11:23:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,406 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,406 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,407 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,491 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737311442] [2021-05-06 11:23:04,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [737311442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:23:04,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268134104] [2021-05-06 11:23:04,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:23:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:23:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:23:04,493 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-05-06 11:23:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,549 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 11:23:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:23:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 24 [2021-05-06 11:23:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,551 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:23:04,551 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 11:23:04,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:23:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 11:23:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 11:23:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 11:23:04,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-06 11:23:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,565 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 11:23:04,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-05-06 11:23:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 11:23:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:23:04,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,567 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:23:04,567 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 7 times [2021-05-06 11:23:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181999405] [2021-05-06 11:23:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,573 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,574 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,663 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181999405] [2021-05-06 11:23:04,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181999405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:23:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628640882] [2021-05-06 11:23:04,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:23:04,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:23:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:23:04,667 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-05-06 11:23:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,724 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 11:23:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:23:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 26 [2021-05-06 11:23:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,725 INFO L225 Difference]: With dead ends: 36 [2021-05-06 11:23:04,725 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 11:23:04,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:23:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 11:23:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-06 11:23:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 11:23:04,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-06 11:23:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,729 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 11:23:04,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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) [2021-05-06 11:23:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 11:23:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:23:04,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,730 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:23:04,730 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 8 times [2021-05-06 11:23:04,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987911899] [2021-05-06 11:23:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,742 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,742 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,743 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,890 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987911899] [2021-05-06 11:23:04,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [987911899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:23:04,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749283195] [2021-05-06 11:23:04,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:23:04,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:23:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:23:04,892 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-05-06 11:23:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,938 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 11:23:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:23:04,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 28 [2021-05-06 11:23:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,939 INFO L225 Difference]: With dead ends: 38 [2021-05-06 11:23:04,939 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:23:04,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:23:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:23:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-06 11:23:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 11:23:04,942 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-06 11:23:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,942 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 11:23:04,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-05-06 11:23:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 11:23:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 11:23:04,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,943 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:23:04,943 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 9 times [2021-05-06 11:23:04,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109545842] [2021-05-06 11:23:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,947 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,947 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,948 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109545842] [2021-05-06 11:23:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109545842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:23:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686126558] [2021-05-06 11:23:05,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:23:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:23:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:23:05,061 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-05-06 11:23:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,119 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 11:23:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:23:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 30 [2021-05-06 11:23:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,120 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:23:05,120 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 11:23:05,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:23:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 11:23:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 11:23:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 11:23:05,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-06 11:23:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,124 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 11:23:05,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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) [2021-05-06 11:23:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 11:23:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:23:05,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,124 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:23:05,125 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 10 times [2021-05-06 11:23:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617014204] [2021-05-06 11:23:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,129 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,129 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,141 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,275 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617014204] [2021-05-06 11:23:05,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617014204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:23:05,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42467139] [2021-05-06 11:23:05,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 11:23:05,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 11:23:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:23:05,277 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-05-06 11:23:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,334 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 11:23:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:23:05,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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 32 [2021-05-06 11:23:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,335 INFO L225 Difference]: With dead ends: 42 [2021-05-06 11:23:05,335 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 11:23:05,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:23:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 11:23:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 11:23:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 11:23:05,338 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-06 11:23:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,338 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 11:23:05,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 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) [2021-05-06 11:23:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 11:23:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:23:05,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,339 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:23:05,339 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 11 times [2021-05-06 11:23:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577048869] [2021-05-06 11:23:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,343 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,343 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,453 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577048869] [2021-05-06 11:23:05,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [577048869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 11:23:05,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111767030] [2021-05-06 11:23:05,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:23:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:23:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:23:05,454 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-05-06 11:23:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,511 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 11:23:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:23:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 34 [2021-05-06 11:23:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,512 INFO L225 Difference]: With dead ends: 44 [2021-05-06 11:23:05,512 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:23:05,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:23:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:23:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 11:23:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 11:23:05,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-06 11:23:05,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,516 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 11:23:05,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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) [2021-05-06 11:23:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 11:23:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 11:23:05,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,516 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:23:05,516 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 12 times [2021-05-06 11:23:05,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773089497] [2021-05-06 11:23:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,522 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,522 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773089497] [2021-05-06 11:23:05,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773089497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:23:05,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003117358] [2021-05-06 11:23:05,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:23:05,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:23:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:23:05,644 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-05-06 11:23:05,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,716 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 11:23:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:23:05,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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 36 [2021-05-06 11:23:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,718 INFO L225 Difference]: With dead ends: 46 [2021-05-06 11:23:05,720 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 11:23:05,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:23:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 11:23:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 11:23:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 11:23:05,724 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-06 11:23:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,724 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 11:23:05,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-05-06 11:23:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 11:23:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 11:23:05,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,725 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 11:23:05,725 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 13 times [2021-05-06 11:23:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889338416] [2021-05-06 11:23:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,729 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,730 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,730 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889338416] [2021-05-06 11:23:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [889338416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:23:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534624106] [2021-05-06 11:23:05,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:23:05,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:23:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:23:05,853 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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) [2021-05-06 11:23:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,910 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 11:23:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 11:23:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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 38 [2021-05-06 11:23:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,911 INFO L225 Difference]: With dead ends: 48 [2021-05-06 11:23:05,911 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 11:23:05,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:23:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 11:23:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 11:23:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 11:23:05,925 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-06 11:23:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,925 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 11:23:05,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 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) [2021-05-06 11:23:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 11:23:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:23:05,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,928 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:23:05,928 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 14 times [2021-05-06 11:23:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288188191] [2021-05-06 11:23:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,934 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,934 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,935 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:06,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:06,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288188191] [2021-05-06 11:23:06,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288188191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:06,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:06,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:23:06,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046251009] [2021-05-06 11:23:06,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:23:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:23:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:23:06,087 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-05-06 11:23:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:06,149 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 11:23:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 11:23:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 40 [2021-05-06 11:23:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:06,150 INFO L225 Difference]: With dead ends: 50 [2021-05-06 11:23:06,150 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 11:23:06,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:23:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 11:23:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 11:23:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 11:23:06,153 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-06 11:23:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:06,153 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 11:23:06,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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) [2021-05-06 11:23:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 11:23:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 11:23:06,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:06,153 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:06,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 11:23:06,153 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 15 times [2021-05-06 11:23:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:06,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892011034] [2021-05-06 11:23:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:06,159 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:06,159 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:06,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:06,315 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:06,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892011034] [2021-05-06 11:23:06,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892011034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:06,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:06,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:23:06,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384701480] [2021-05-06 11:23:06,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:23:06,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:23:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:23:06,316 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-05-06 11:23:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:06,361 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 11:23:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:23:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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 42 [2021-05-06 11:23:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:06,362 INFO L225 Difference]: With dead ends: 52 [2021-05-06 11:23:06,362 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 11:23:06,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:23:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 11:23:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 11:23:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 11:23:06,365 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-06 11:23:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:06,365 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 11:23:06,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 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) [2021-05-06 11:23:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 11:23:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 11:23:06,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:06,366 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:06,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 11:23:06,366 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 16 times [2021-05-06 11:23:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:06,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38910757] [2021-05-06 11:23:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:06,370 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:06,370 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:06,370 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:06,527 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:06,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38910757] [2021-05-06 11:23:06,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [38910757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:06,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:06,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 11:23:06,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076126316] [2021-05-06 11:23:06,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 11:23:06,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 11:23:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:23:06,529 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-05-06 11:23:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:06,595 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 11:23:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:23:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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 44 [2021-05-06 11:23:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:06,596 INFO L225 Difference]: With dead ends: 54 [2021-05-06 11:23:06,596 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 11:23:06,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:23:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 11:23:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-06 11:23:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 11:23:06,598 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-06 11:23:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:06,599 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 11:23:06,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2021-05-06 11:23:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 11:23:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:23:06,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:06,599 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:06,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:23:06,599 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 17 times [2021-05-06 11:23:06,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:06,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662617833] [2021-05-06 11:23:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:06,604 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:06,604 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:06,605 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:06,793 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:06,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662617833] [2021-05-06 11:23:06,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662617833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:06,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:06,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:23:06,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845675936] [2021-05-06 11:23:06,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:23:06,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:23:06,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:23:06,795 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-05-06 11:23:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:06,868 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 11:23:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:23:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 46 [2021-05-06 11:23:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:06,868 INFO L225 Difference]: With dead ends: 56 [2021-05-06 11:23:06,868 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 11:23:06,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:23:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 11:23:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-06 11:23:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 11:23:06,871 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-06 11:23:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:06,871 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 11:23:06,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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) [2021-05-06 11:23:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 11:23:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:23:06,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:06,872 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:06,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 11:23:06,872 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 18 times [2021-05-06 11:23:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:06,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054577751] [2021-05-06 11:23:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:06,876 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:06,876 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:06,877 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:07,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054577751] [2021-05-06 11:23:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054577751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:07,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:07,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 11:23:07,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643927804] [2021-05-06 11:23:07,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 11:23:07,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:07,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 11:23:07,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:23:07,066 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-05-06 11:23:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:07,200 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 11:23:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:23:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 48 [2021-05-06 11:23:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:07,201 INFO L225 Difference]: With dead ends: 58 [2021-05-06 11:23:07,201 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 11:23:07,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:23:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 11:23:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-06 11:23:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 11:23:07,203 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-06 11:23:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 11:23:07,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-05-06 11:23:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 11:23:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 11:23:07,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:07,204 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:07,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 11:23:07,204 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 19 times [2021-05-06 11:23:07,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098594143] [2021-05-06 11:23:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:07,208 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:07,208 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:07,209 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:07,427 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:07,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098594143] [2021-05-06 11:23:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098594143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 11:23:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501552288] [2021-05-06 11:23:07,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 11:23:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 11:23:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:23:07,429 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-06 11:23:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:07,507 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 11:23:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 11:23:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 50 [2021-05-06 11:23:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:07,508 INFO L225 Difference]: With dead ends: 60 [2021-05-06 11:23:07,508 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 11:23:07,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:23:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 11:23:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 11:23:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 11:23:07,511 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-06 11:23:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:07,511 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 11:23:07,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-05-06 11:23:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 11:23:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 11:23:07,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:07,511 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:07,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:23:07,512 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 20 times [2021-05-06 11:23:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:07,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70472687] [2021-05-06 11:23:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:07,527 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:07,527 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:07,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:07,786 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:07,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70472687] [2021-05-06 11:23:07,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [70472687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:07,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:07,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 11:23:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828756515] [2021-05-06 11:23:07,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 11:23:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 11:23:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:23:07,787 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-05-06 11:23:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:07,880 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 11:23:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:23:07,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 52 [2021-05-06 11:23:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:07,881 INFO L225 Difference]: With dead ends: 62 [2021-05-06 11:23:07,881 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 11:23:07,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:23:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 11:23:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 11:23:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 11:23:07,885 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-06 11:23:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:07,885 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 11:23:07,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2021-05-06 11:23:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 11:23:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 11:23:07,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:07,886 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:07,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 11:23:07,886 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 21 times [2021-05-06 11:23:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:07,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191850038] [2021-05-06 11:23:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:07,899 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:07,899 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:07,900 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:08,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:08,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191850038] [2021-05-06 11:23:08,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191850038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:08,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:08,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 11:23:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045855806] [2021-05-06 11:23:08,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 11:23:08,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 11:23:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:23:08,113 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-06 11:23:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:08,163 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 11:23:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 11:23:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 54 [2021-05-06 11:23:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:08,164 INFO L225 Difference]: With dead ends: 64 [2021-05-06 11:23:08,164 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 11:23:08,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:23:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 11:23:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 11:23:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 11:23:08,167 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-06 11:23:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 11:23:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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) [2021-05-06 11:23:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 11:23:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 11:23:08,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:08,167 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:08,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:23:08,167 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 22 times [2021-05-06 11:23:08,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:08,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482103807] [2021-05-06 11:23:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:08,173 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:08,173 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:08,174 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:08,451 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:08,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482103807] [2021-05-06 11:23:08,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482103807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:08,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:08,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 11:23:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374187373] [2021-05-06 11:23:08,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 11:23:08,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 11:23:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:23:08,452 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-05-06 11:23:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:08,531 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 11:23:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 11:23:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 56 [2021-05-06 11:23:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:08,532 INFO L225 Difference]: With dead ends: 66 [2021-05-06 11:23:08,532 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 11:23:08,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:23:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 11:23:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 11:23:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 11:23:08,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-06 11:23:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:08,534 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 11:23:08,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-05-06 11:23:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 11:23:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 11:23:08,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:08,535 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:08,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 11:23:08,535 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 23 times [2021-05-06 11:23:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882719682] [2021-05-06 11:23:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:08,539 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:08,539 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:08,539 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:08,785 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:08,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882719682] [2021-05-06 11:23:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882719682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:08,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:08,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 11:23:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285206888] [2021-05-06 11:23:08,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 11:23:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 11:23:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:23:08,786 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-05-06 11:23:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:08,850 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 11:23:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 11:23:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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 58 [2021-05-06 11:23:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:08,850 INFO L225 Difference]: With dead ends: 68 [2021-05-06 11:23:08,850 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 11:23:08,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:23:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 11:23:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 11:23:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 11:23:08,853 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-06 11:23:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 11:23:08,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 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) [2021-05-06 11:23:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 11:23:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 11:23:08,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:08,854 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:08,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 11:23:08,854 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 24 times [2021-05-06 11:23:08,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:08,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504800864] [2021-05-06 11:23:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:08,859 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:08,859 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:08,860 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:09,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:09,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504800864] [2021-05-06 11:23:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [504800864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 11:23:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046270181] [2021-05-06 11:23:09,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 11:23:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 11:23:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:23:09,147 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-06 11:23:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:09,262 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 11:23:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 11:23:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 60 [2021-05-06 11:23:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:09,263 INFO L225 Difference]: With dead ends: 70 [2021-05-06 11:23:09,263 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 11:23:09,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:23:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 11:23:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 11:23:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 11:23:09,273 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-06 11:23:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:09,273 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 11:23:09,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-06 11:23:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 11:23:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 11:23:09,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:09,274 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:09,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 11:23:09,274 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 25 times [2021-05-06 11:23:09,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:09,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587203081] [2021-05-06 11:23:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:09,281 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:09,281 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:09,282 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:09,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:09,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587203081] [2021-05-06 11:23:09,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587203081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:09,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:09,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 11:23:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195685677] [2021-05-06 11:23:09,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 11:23:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 11:23:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:23:09,605 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-05-06 11:23:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:09,701 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 11:23:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 11:23:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 62 [2021-05-06 11:23:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:09,702 INFO L225 Difference]: With dead ends: 72 [2021-05-06 11:23:09,702 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 11:23:09,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:23:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 11:23:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-06 11:23:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 11:23:09,706 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-06 11:23:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:09,706 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 11:23:09,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-05-06 11:23:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 11:23:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 11:23:09,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:09,707 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:09,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-06 11:23:09,707 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 26 times [2021-05-06 11:23:09,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:09,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480936650] [2021-05-06 11:23:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:09,712 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:09,712 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:09,714 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:10,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:10,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480936650] [2021-05-06 11:23:10,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480936650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:10,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:10,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 11:23:10,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40804655] [2021-05-06 11:23:10,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 11:23:10,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:10,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 11:23:10,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:23:10,068 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-05-06 11:23:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:10,139 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 11:23:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 11:23:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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 64 [2021-05-06 11:23:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:10,140 INFO L225 Difference]: With dead ends: 74 [2021-05-06 11:23:10,140 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 11:23:10,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:23:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 11:23:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-06 11:23:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 11:23:10,143 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-06 11:23:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:10,143 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 11:23:10,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-05-06 11:23:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 11:23:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 11:23:10,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:10,144 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:10,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 11:23:10,144 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 27 times [2021-05-06 11:23:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:10,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704318944] [2021-05-06 11:23:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:10,148 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:10,149 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:10,149 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:10,484 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704318944] [2021-05-06 11:23:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704318944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:10,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:10,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 11:23:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721096979] [2021-05-06 11:23:10,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 11:23:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 11:23:10,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:23:10,485 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2021-05-06 11:23:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:10,547 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 11:23:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 11:23:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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 66 [2021-05-06 11:23:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:10,548 INFO L225 Difference]: With dead ends: 76 [2021-05-06 11:23:10,548 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 11:23:10,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:23:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 11:23:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-06 11:23:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 11:23:10,552 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-06 11:23:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:10,552 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 11:23:10,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 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) [2021-05-06 11:23:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 11:23:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 11:23:10,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:10,552 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:10,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-06 11:23:10,552 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 28 times [2021-05-06 11:23:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:10,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996115815] [2021-05-06 11:23:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:10,556 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:10,556 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:10,557 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:10,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:10,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996115815] [2021-05-06 11:23:10,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [996115815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:10,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:10,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 11:23:10,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518638257] [2021-05-06 11:23:10,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 11:23:10,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:10,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 11:23:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:23:10,902 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-05-06 11:23:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:10,972 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 11:23:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 11:23:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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 68 [2021-05-06 11:23:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:10,973 INFO L225 Difference]: With dead ends: 78 [2021-05-06 11:23:10,973 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 11:23:10,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:23:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 11:23:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-06 11:23:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 11:23:10,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-06 11:23:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:10,977 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 11:23:10,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-05-06 11:23:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 11:23:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 11:23:10,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:10,978 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:10,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-06 11:23:10,978 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 29 times [2021-05-06 11:23:10,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:10,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051555334] [2021-05-06 11:23:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:10,982 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:10,982 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:10,984 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:11,400 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:11,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051555334] [2021-05-06 11:23:11,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051555334] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:11,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:11,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 11:23:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398049698] [2021-05-06 11:23:11,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 11:23:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:11,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 11:23:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:23:11,401 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-05-06 11:23:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:11,507 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 11:23:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 11:23:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 70 [2021-05-06 11:23:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:11,508 INFO L225 Difference]: With dead ends: 80 [2021-05-06 11:23:11,508 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 11:23:11,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:23:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 11:23:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 11:23:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 11:23:11,510 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-06 11:23:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:11,511 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 11:23:11,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-05-06 11:23:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 11:23:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 11:23:11,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:11,511 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:11,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-06 11:23:11,512 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 30 times [2021-05-06 11:23:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:11,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995327961] [2021-05-06 11:23:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:11,516 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:11,516 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:11,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:11,895 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:11,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995327961] [2021-05-06 11:23:11,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995327961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:11,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:11,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 11:23:11,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183004983] [2021-05-06 11:23:11,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 11:23:11,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:11,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 11:23:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:23:11,897 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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) [2021-05-06 11:23:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:12,011 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 11:23:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 11:23:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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 72 [2021-05-06 11:23:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:12,012 INFO L225 Difference]: With dead ends: 82 [2021-05-06 11:23:12,012 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 11:23:12,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:23:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 11:23:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 11:23:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 11:23:12,016 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-06 11:23:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:12,016 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 11:23:12,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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) [2021-05-06 11:23:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 11:23:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 11:23:12,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:12,017 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:12,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-06 11:23:12,017 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 31 times [2021-05-06 11:23:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786586066] [2021-05-06 11:23:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:12,021 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:12,021 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:12,022 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:12,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:12,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:12,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786586066] [2021-05-06 11:23:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [786586066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:12,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:12,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 11:23:12,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93960357] [2021-05-06 11:23:12,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 11:23:12,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 11:23:12,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:23:12,482 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-05-06 11:23:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:12,574 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 11:23:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 11:23:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 74 [2021-05-06 11:23:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:12,575 INFO L225 Difference]: With dead ends: 84 [2021-05-06 11:23:12,575 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 11:23:12,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:23:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 11:23:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-06 11:23:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 11:23:12,578 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-06 11:23:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:12,578 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 11:23:12,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-05-06 11:23:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 11:23:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 11:23:12,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:12,579 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:12,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 11:23:12,579 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:12,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:12,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 32 times [2021-05-06 11:23:12,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:12,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287551444] [2021-05-06 11:23:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:12,585 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:12,586 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:12,586 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:13,077 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287551444] [2021-05-06 11:23:13,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287551444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:13,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:13,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 11:23:13,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619299091] [2021-05-06 11:23:13,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 11:23:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 11:23:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:23:13,078 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-05-06 11:23:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:13,198 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 11:23:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 11:23:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 76 [2021-05-06 11:23:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:13,199 INFO L225 Difference]: With dead ends: 86 [2021-05-06 11:23:13,199 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 11:23:13,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:23:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 11:23:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-06 11:23:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 11:23:13,203 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-06 11:23:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:13,203 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 11:23:13,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2021-05-06 11:23:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 11:23:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 11:23:13,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:13,204 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:13,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-06 11:23:13,204 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 33 times [2021-05-06 11:23:13,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:13,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045984052] [2021-05-06 11:23:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:13,209 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:13,209 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:13,210 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:13,669 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:13,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045984052] [2021-05-06 11:23:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045984052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:13,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:13,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 11:23:13,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907929464] [2021-05-06 11:23:13,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 11:23:13,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:13,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 11:23:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:23:13,671 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 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) [2021-05-06 11:23:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:13,815 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 11:23:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 11:23:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 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 78 [2021-05-06 11:23:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:13,815 INFO L225 Difference]: With dead ends: 88 [2021-05-06 11:23:13,815 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 11:23:13,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:23:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 11:23:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-06 11:23:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 11:23:13,818 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-06 11:23:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:13,818 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 11:23:13,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 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) [2021-05-06 11:23:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 11:23:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 11:23:13,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:13,819 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:13,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-06 11:23:13,819 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 34 times [2021-05-06 11:23:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:13,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460341601] [2021-05-06 11:23:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:13,823 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:13,823 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:13,823 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:14,324 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:14,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460341601] [2021-05-06 11:23:14,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460341601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:14,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:14,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 11:23:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337857127] [2021-05-06 11:23:14,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 11:23:14,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 11:23:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:23:14,326 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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) [2021-05-06 11:23:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:14,455 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 11:23:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 11:23:14,455 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 80 [2021-05-06 11:23:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:14,456 INFO L225 Difference]: With dead ends: 90 [2021-05-06 11:23:14,456 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 11:23:14,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:23:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 11:23:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-06 11:23:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 11:23:14,459 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-06 11:23:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:14,459 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 11:23:14,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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) [2021-05-06 11:23:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 11:23:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 11:23:14,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:14,459 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:14,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-06 11:23:14,460 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 35 times [2021-05-06 11:23:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:14,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656228992] [2021-05-06 11:23:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:14,464 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:14,464 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:14,465 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:14,969 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656228992] [2021-05-06 11:23:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656228992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 11:23:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995166652] [2021-05-06 11:23:14,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 11:23:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 11:23:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:23:14,970 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 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) [2021-05-06 11:23:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:15,111 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 11:23:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 11:23:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 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 82 [2021-05-06 11:23:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:15,112 INFO L225 Difference]: With dead ends: 92 [2021-05-06 11:23:15,112 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 11:23:15,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:23:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 11:23:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-06 11:23:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 11:23:15,115 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-06 11:23:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:15,115 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 11:23:15,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 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) [2021-05-06 11:23:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 11:23:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 11:23:15,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:15,115 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:15,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-06 11:23:15,116 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 36 times [2021-05-06 11:23:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:15,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577669848] [2021-05-06 11:23:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:15,120 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:15,120 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:15,120 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:15,658 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577669848] [2021-05-06 11:23:15,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577669848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:15,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:15,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 11:23:15,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261351599] [2021-05-06 11:23:15,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 11:23:15,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:15,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 11:23:15,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:23:15,660 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 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) [2021-05-06 11:23:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:15,820 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 11:23:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 11:23:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 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 84 [2021-05-06 11:23:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:15,821 INFO L225 Difference]: With dead ends: 94 [2021-05-06 11:23:15,821 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 11:23:15,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:23:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 11:23:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-06 11:23:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 11:23:15,823 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-06 11:23:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:15,824 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 11:23:15,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 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) [2021-05-06 11:23:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 11:23:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 11:23:15,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:15,824 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:15,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 11:23:15,824 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 37 times [2021-05-06 11:23:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:15,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816033180] [2021-05-06 11:23:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:15,833 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:15,833 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:15,834 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:16,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:16,401 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:16,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816033180] [2021-05-06 11:23:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816033180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:16,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:16,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 11:23:16,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973673666] [2021-05-06 11:23:16,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 11:23:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 11:23:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:23:16,402 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 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) [2021-05-06 11:23:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:16,496 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 11:23:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 11:23:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 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 86 [2021-05-06 11:23:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:16,498 INFO L225 Difference]: With dead ends: 96 [2021-05-06 11:23:16,498 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 11:23:16,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:23:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 11:23:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-06 11:23:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 11:23:16,500 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-06 11:23:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:16,500 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 11:23:16,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 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) [2021-05-06 11:23:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 11:23:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 11:23:16,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:16,501 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:16,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-06 11:23:16,501 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:16,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 38 times [2021-05-06 11:23:16,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:16,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965604690] [2021-05-06 11:23:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:16,505 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:16,505 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:16,506 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:17,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:17,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965604690] [2021-05-06 11:23:17,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [965604690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:17,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:17,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 11:23:17,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311104607] [2021-05-06 11:23:17,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 11:23:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:17,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 11:23:17,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:23:17,082 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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) [2021-05-06 11:23:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:17,262 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 11:23:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 11:23:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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 88 [2021-05-06 11:23:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:17,263 INFO L225 Difference]: With dead ends: 98 [2021-05-06 11:23:17,263 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 11:23:17,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:23:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 11:23:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 11:23:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 11:23:17,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-06 11:23:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:17,268 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 11:23:17,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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) [2021-05-06 11:23:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 11:23:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 11:23:17,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:17,269 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:17,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-06 11:23:17,269 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 39 times [2021-05-06 11:23:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:17,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470712400] [2021-05-06 11:23:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:17,275 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:17,275 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:17,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:17,892 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:17,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470712400] [2021-05-06 11:23:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [470712400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:17,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 11:23:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212413508] [2021-05-06 11:23:17,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 11:23:17,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 11:23:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:23:17,894 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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) [2021-05-06 11:23:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:18,004 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 11:23:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 11:23:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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 90 [2021-05-06 11:23:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:18,005 INFO L225 Difference]: With dead ends: 100 [2021-05-06 11:23:18,005 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 11:23:18,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:23:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 11:23:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-06 11:23:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 11:23:18,008 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-06 11:23:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:18,008 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 11:23:18,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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) [2021-05-06 11:23:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 11:23:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 11:23:18,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:18,008 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:18,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-06 11:23:18,009 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 40 times [2021-05-06 11:23:18,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:18,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185555766] [2021-05-06 11:23:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:18,030 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:18,030 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:18,035 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:18,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:18,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:18,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185555766] [2021-05-06 11:23:18,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [185555766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:18,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:18,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 11:23:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65785783] [2021-05-06 11:23:18,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 11:23:18,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:18,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 11:23:18,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:23:18,706 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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) [2021-05-06 11:23:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:18,796 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 11:23:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 11:23:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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 92 [2021-05-06 11:23:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:18,796 INFO L225 Difference]: With dead ends: 102 [2021-05-06 11:23:18,797 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 11:23:18,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 630.8ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:23:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 11:23:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-06 11:23:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 11:23:18,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-06 11:23:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:18,799 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 11:23:18,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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) [2021-05-06 11:23:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 11:23:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 11:23:18,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:18,800 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:18,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-06 11:23:18,800 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:18,800 INFO L82 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 41 times [2021-05-06 11:23:18,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:18,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116397582] [2021-05-06 11:23:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:18,812 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:18,812 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:18,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:19,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:19,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116397582] [2021-05-06 11:23:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116397582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:19,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:19,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 11:23:19,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532553682] [2021-05-06 11:23:19,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 11:23:19,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 11:23:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:23:19,483 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 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) [2021-05-06 11:23:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:19,664 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 11:23:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 11:23:19,664 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 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 94 [2021-05-06 11:23:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:19,665 INFO L225 Difference]: With dead ends: 104 [2021-05-06 11:23:19,665 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 11:23:19,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:23:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 11:23:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-06 11:23:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 11:23:19,668 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-06 11:23:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:19,668 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 11:23:19,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 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) [2021-05-06 11:23:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 11:23:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 11:23:19,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:19,669 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:19,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 11:23:19,669 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 42 times [2021-05-06 11:23:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:19,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030890572] [2021-05-06 11:23:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:19,674 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:19,674 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:19,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:20,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:20,397 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:20,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030890572] [2021-05-06 11:23:20,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1030890572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:20,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:20,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 11:23:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678723310] [2021-05-06 11:23:20,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 11:23:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 11:23:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:23:20,398 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 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) [2021-05-06 11:23:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:20,557 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 11:23:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 11:23:20,558 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 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 96 [2021-05-06 11:23:20,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:20,558 INFO L225 Difference]: With dead ends: 106 [2021-05-06 11:23:20,558 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 11:23:20,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:23:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 11:23:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-06 11:23:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 11:23:20,561 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-06 11:23:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:20,561 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 11:23:20,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 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) [2021-05-06 11:23:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 11:23:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 11:23:20,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:20,562 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:20,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-06 11:23:20,562 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:20,562 INFO L82 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 43 times [2021-05-06 11:23:20,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:20,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345489478] [2021-05-06 11:23:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:20,566 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:20,567 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:20,567 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:21,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:21,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:21,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345489478] [2021-05-06 11:23:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [345489478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:21,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:21,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 11:23:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779264234] [2021-05-06 11:23:21,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 11:23:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 11:23:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:23:21,304 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 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) [2021-05-06 11:23:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:21,412 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 11:23:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 11:23:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 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 98 [2021-05-06 11:23:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:21,414 INFO L225 Difference]: With dead ends: 108 [2021-05-06 11:23:21,414 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 11:23:21,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:23:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 11:23:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-06 11:23:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 11:23:21,416 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-06 11:23:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:21,417 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 11:23:21,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 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) [2021-05-06 11:23:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 11:23:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 11:23:21,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:21,417 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:21,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-06 11:23:21,417 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:21,418 INFO L82 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 44 times [2021-05-06 11:23:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:21,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324285105] [2021-05-06 11:23:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:21,424 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:21,424 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:21,425 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:22,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:22,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:22,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324285105] [2021-05-06 11:23:22,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [324285105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:22,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:22,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 11:23:22,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417435234] [2021-05-06 11:23:22,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 11:23:22,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 11:23:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:23:22,185 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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) [2021-05-06 11:23:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:22,350 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-06 11:23:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 11:23:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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 100 [2021-05-06 11:23:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:22,351 INFO L225 Difference]: With dead ends: 110 [2021-05-06 11:23:22,351 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 11:23:22,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 715.4ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:23:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 11:23:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 11:23:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 11:23:22,354 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-06 11:23:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:22,355 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 11:23:22,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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) [2021-05-06 11:23:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 11:23:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 11:23:22,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:22,355 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:22,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-06 11:23:22,355 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 45 times [2021-05-06 11:23:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:22,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118832301] [2021-05-06 11:23:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:22,364 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:22,364 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:22,365 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:23,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:23,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:23,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118832301] [2021-05-06 11:23:23,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [118832301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:23,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:23,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 11:23:23,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424147287] [2021-05-06 11:23:23,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 11:23:23,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:23,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 11:23:23,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:23:23,178 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 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) [2021-05-06 11:23:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:23,350 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-06 11:23:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 11:23:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 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 102 [2021-05-06 11:23:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:23,351 INFO L225 Difference]: With dead ends: 112 [2021-05-06 11:23:23,351 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 11:23:23,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 764.8ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:23:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 11:23:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-06 11:23:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-06 11:23:23,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-06 11:23:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:23,353 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-06 11:23:23,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 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) [2021-05-06 11:23:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-06 11:23:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 11:23:23,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:23,354 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:23,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-06 11:23:23,354 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:23,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 46 times [2021-05-06 11:23:23,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:23,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941278971] [2021-05-06 11:23:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:23,360 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:23,360 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:23,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:24,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:24,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941278971] [2021-05-06 11:23:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941278971] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:24,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:24,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 11:23:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505557188] [2021-05-06 11:23:24,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 11:23:24,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 11:23:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:23:24,162 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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) [2021-05-06 11:23:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:24,315 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-06 11:23:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 11:23:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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 104 [2021-05-06 11:23:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:24,316 INFO L225 Difference]: With dead ends: 114 [2021-05-06 11:23:24,316 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 11:23:24,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:23:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 11:23:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 11:23:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-06 11:23:24,319 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-06 11:23:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:24,319 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-06 11:23:24,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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) [2021-05-06 11:23:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-06 11:23:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 11:23:24,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:24,319 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:24,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 11:23:24,320 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 47 times [2021-05-06 11:23:24,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:24,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712358466] [2021-05-06 11:23:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:24,326 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:24,326 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:24,327 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:25,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:25,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712358466] [2021-05-06 11:23:25,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1712358466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:25,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:25,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 11:23:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349155931] [2021-05-06 11:23:25,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 11:23:25,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 11:23:25,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:23:25,214 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 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) [2021-05-06 11:23:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:25,352 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-06 11:23:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 11:23:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 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 106 [2021-05-06 11:23:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:25,353 INFO L225 Difference]: With dead ends: 116 [2021-05-06 11:23:25,353 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 11:23:25,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:23:25,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 11:23:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-06 11:23:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-06 11:23:25,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-06 11:23:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:25,356 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-06 11:23:25,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 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) [2021-05-06 11:23:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-06 11:23:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 11:23:25,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:25,357 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:25,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-06 11:23:25,357 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 48 times [2021-05-06 11:23:25,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:25,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196747293] [2021-05-06 11:23:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:25,360 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:25,361 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:25,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:26,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:26,220 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196747293] [2021-05-06 11:23:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196747293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:26,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:26,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 11:23:26,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087409830] [2021-05-06 11:23:26,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 11:23:26,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 11:23:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:23:26,222 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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) [2021-05-06 11:23:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:26,352 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-06 11:23:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 11:23:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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 108 [2021-05-06 11:23:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:26,353 INFO L225 Difference]: With dead ends: 118 [2021-05-06 11:23:26,353 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 11:23:26,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:23:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 11:23:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-06 11:23:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-06 11:23:26,356 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-06 11:23:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:26,356 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-06 11:23:26,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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) [2021-05-06 11:23:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-06 11:23:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 11:23:26,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:26,356 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:26,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-06 11:23:26,357 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 49 times [2021-05-06 11:23:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:26,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136970313] [2021-05-06 11:23:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:26,360 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:26,360 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:26,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:27,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:27,301 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:27,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136970313] [2021-05-06 11:23:27,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [136970313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:27,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:27,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 11:23:27,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419346578] [2021-05-06 11:23:27,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 11:23:27,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:27,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 11:23:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:23:27,302 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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) [2021-05-06 11:23:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:27,424 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-06 11:23:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 11:23:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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 110 [2021-05-06 11:23:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:27,425 INFO L225 Difference]: With dead ends: 120 [2021-05-06 11:23:27,425 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 11:23:27,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 895.4ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:23:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 11:23:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-06 11:23:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-06 11:23:27,427 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-06 11:23:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:27,427 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-06 11:23:27,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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) [2021-05-06 11:23:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-06 11:23:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 11:23:27,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:27,428 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:27,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-06 11:23:27,428 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 50 times [2021-05-06 11:23:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:27,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351078328] [2021-05-06 11:23:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:27,432 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:27,432 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:27,433 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:28,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:28,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351078328] [2021-05-06 11:23:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [351078328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:28,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:28,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 11:23:28,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702709513] [2021-05-06 11:23:28,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 11:23:28,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 11:23:28,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:23:28,370 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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) [2021-05-06 11:23:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:28,521 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-06 11:23:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 11:23:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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 112 [2021-05-06 11:23:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:28,522 INFO L225 Difference]: With dead ends: 122 [2021-05-06 11:23:28,522 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 11:23:28,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:23:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 11:23:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-06 11:23:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-06 11:23:28,524 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-06 11:23:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:28,524 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-06 11:23:28,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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) [2021-05-06 11:23:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-06 11:23:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 11:23:28,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:28,525 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:28,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-06 11:23:28,525 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 51 times [2021-05-06 11:23:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371283296] [2021-05-06 11:23:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:28,529 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:28,529 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:28,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:29,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:29,484 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:29,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371283296] [2021-05-06 11:23:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [371283296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:29,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:29,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 11:23:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629674910] [2021-05-06 11:23:29,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 11:23:29,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:29,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 11:23:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:23:29,485 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 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) [2021-05-06 11:23:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:29,660 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-06 11:23:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 11:23:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 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 114 [2021-05-06 11:23:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:29,661 INFO L225 Difference]: With dead ends: 124 [2021-05-06 11:23:29,661 INFO L226 Difference]: Without dead ends: 118 [2021-05-06 11:23:29,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:23:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-06 11:23:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-06 11:23:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-06 11:23:29,663 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-06 11:23:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:29,663 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-06 11:23:29,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 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) [2021-05-06 11:23:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-06 11:23:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 11:23:29,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:29,664 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:29,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 11:23:29,664 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 52 times [2021-05-06 11:23:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:29,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969234003] [2021-05-06 11:23:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:29,669 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:29,669 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:29,669 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:30,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:30,678 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:30,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969234003] [2021-05-06 11:23:30,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969234003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:30,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:30,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 11:23:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482753575] [2021-05-06 11:23:30,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 11:23:30,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 11:23:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:23:30,686 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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) [2021-05-06 11:23:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:30,888 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-06 11:23:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 11:23:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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 116 [2021-05-06 11:23:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:30,888 INFO L225 Difference]: With dead ends: 126 [2021-05-06 11:23:30,889 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 11:23:30,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:23:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 11:23:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-06 11:23:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-06 11:23:30,891 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-06 11:23:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-06 11:23:30,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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) [2021-05-06 11:23:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-06 11:23:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 11:23:30,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:30,892 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:30,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-06 11:23:30,892 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 53 times [2021-05-06 11:23:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:30,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611030826] [2021-05-06 11:23:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:30,895 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:30,895 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:30,896 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:31,961 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611030826] [2021-05-06 11:23:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611030826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:31,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:31,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 11:23:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033758745] [2021-05-06 11:23:31,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 11:23:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 11:23:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:23:31,962 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 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) [2021-05-06 11:23:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:32,180 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-06 11:23:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 11:23:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 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 118 [2021-05-06 11:23:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:32,181 INFO L225 Difference]: With dead ends: 128 [2021-05-06 11:23:32,181 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 11:23:32,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1013.2ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:23:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 11:23:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-06 11:23:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-06 11:23:32,183 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-06 11:23:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:32,184 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-06 11:23:32,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 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) [2021-05-06 11:23:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-06 11:23:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 11:23:32,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:32,184 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:32,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-06 11:23:32,184 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 54 times [2021-05-06 11:23:32,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:32,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759780481] [2021-05-06 11:23:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:32,188 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:32,188 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:32,189 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:33,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:33,330 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:33,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759780481] [2021-05-06 11:23:33,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759780481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:33,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:33,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 11:23:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861446016] [2021-05-06 11:23:33,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 11:23:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 11:23:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:23:33,331 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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) [2021-05-06 11:23:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:33,502 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-06 11:23:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 11:23:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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 120 [2021-05-06 11:23:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:33,503 INFO L225 Difference]: With dead ends: 130 [2021-05-06 11:23:33,503 INFO L226 Difference]: Without dead ends: 124 [2021-05-06 11:23:33,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1093.1ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:23:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-06 11:23:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-06 11:23:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-06 11:23:33,505 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-06 11:23:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:33,505 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-06 11:23:33,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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) [2021-05-06 11:23:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-06 11:23:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 11:23:33,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:33,506 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:33,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-06 11:23:33,506 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 55 times [2021-05-06 11:23:33,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:33,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833750651] [2021-05-06 11:23:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:33,520 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:33,521 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:33,521 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:34,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:34,849 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833750651] [2021-05-06 11:23:34,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833750651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:34,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:34,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 11:23:34,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325129611] [2021-05-06 11:23:34,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 11:23:34,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:34,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 11:23:34,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:23:34,851 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 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) [2021-05-06 11:23:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:35,072 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-06 11:23:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 11:23:35,072 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 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 122 [2021-05-06 11:23:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:35,073 INFO L225 Difference]: With dead ends: 132 [2021-05-06 11:23:35,073 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 11:23:35,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1259.2ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:23:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 11:23:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-06 11:23:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-06 11:23:35,092 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-06 11:23:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:35,092 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-06 11:23:35,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 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) [2021-05-06 11:23:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-06 11:23:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 11:23:35,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:35,093 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:35,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-06 11:23:35,093 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 56 times [2021-05-06 11:23:35,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:35,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139742777] [2021-05-06 11:23:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:35,097 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:35,097 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:35,097 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:36,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:36,384 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:36,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139742777] [2021-05-06 11:23:36,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139742777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:36,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:36,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 11:23:36,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271946219] [2021-05-06 11:23:36,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 11:23:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 11:23:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:23:36,385 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 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) [2021-05-06 11:23:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:36,555 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-06 11:23:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 11:23:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 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 124 [2021-05-06 11:23:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:36,556 INFO L225 Difference]: With dead ends: 134 [2021-05-06 11:23:36,556 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 11:23:36,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1191.8ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:23:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 11:23:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-06 11:23:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-06 11:23:36,559 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-06 11:23:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:36,559 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-06 11:23:36,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 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) [2021-05-06 11:23:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-06 11:23:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-06 11:23:36,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:36,559 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:36,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 11:23:36,559 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 57 times [2021-05-06 11:23:36,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:36,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946816517] [2021-05-06 11:23:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:36,569 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:36,569 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:36,569 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:37,777 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:37,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946816517] [2021-05-06 11:23:37,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946816517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:37,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:37,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 11:23:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737675288] [2021-05-06 11:23:37,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 11:23:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 11:23:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:23:37,778 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 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) [2021-05-06 11:23:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:37,993 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-06 11:23:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 11:23:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 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 126 [2021-05-06 11:23:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:37,994 INFO L225 Difference]: With dead ends: 136 [2021-05-06 11:23:37,994 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 11:23:37,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1138.4ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:23:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 11:23:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-06 11:23:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-06 11:23:38,001 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-06 11:23:38,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:38,001 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-06 11:23:38,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 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) [2021-05-06 11:23:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-06 11:23:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 11:23:38,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:38,002 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:38,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-06 11:23:38,002 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 58 times [2021-05-06 11:23:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:38,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069589648] [2021-05-06 11:23:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:38,005 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:38,005 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:38,006 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:39,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:39,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:39,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069589648] [2021-05-06 11:23:39,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069589648] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:39,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:39,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 11:23:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695413478] [2021-05-06 11:23:39,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 11:23:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 11:23:39,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:23:39,250 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 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) [2021-05-06 11:23:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:39,458 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-06 11:23:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 11:23:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 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 128 [2021-05-06 11:23:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:39,459 INFO L225 Difference]: With dead ends: 138 [2021-05-06 11:23:39,459 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 11:23:39,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1187.1ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:23:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 11:23:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-06 11:23:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-06 11:23:39,462 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-06 11:23:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:39,462 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-06 11:23:39,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 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) [2021-05-06 11:23:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-06 11:23:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 11:23:39,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:39,463 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:39,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-06 11:23:39,463 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 59 times [2021-05-06 11:23:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:39,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327754088] [2021-05-06 11:23:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:39,466 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:39,466 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:39,467 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:40,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:40,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:40,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327754088] [2021-05-06 11:23:40,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327754088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:40,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:40,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 11:23:40,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724396476] [2021-05-06 11:23:40,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 11:23:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:40,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 11:23:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:23:40,791 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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) [2021-05-06 11:23:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:40,947 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-06 11:23:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 11:23:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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 130 [2021-05-06 11:23:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:40,948 INFO L225 Difference]: With dead ends: 140 [2021-05-06 11:23:40,948 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 11:23:40,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1273.5ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:23:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 11:23:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-06 11:23:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-06 11:23:40,951 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-06 11:23:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:40,951 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-06 11:23:40,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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) [2021-05-06 11:23:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-06 11:23:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 11:23:40,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:40,952 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:40,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-06 11:23:40,952 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 60 times [2021-05-06 11:23:40,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:40,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115396505] [2021-05-06 11:23:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:40,955 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:40,955 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:40,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:42,277 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115396505] [2021-05-06 11:23:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115396505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:42,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:42,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 11:23:42,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102374112] [2021-05-06 11:23:42,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 11:23:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 11:23:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:23:42,279 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 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) [2021-05-06 11:23:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:42,498 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-06 11:23:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 11:23:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 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 132 [2021-05-06 11:23:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:42,499 INFO L225 Difference]: With dead ends: 142 [2021-05-06 11:23:42,499 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 11:23:42,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1266.0ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:23:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 11:23:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-06 11:23:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-06 11:23:42,502 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-06 11:23:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:42,502 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-06 11:23:42,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 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) [2021-05-06 11:23:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-06 11:23:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 11:23:42,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:42,502 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:42,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-06 11:23:42,503 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 61 times [2021-05-06 11:23:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:42,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530623387] [2021-05-06 11:23:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:42,507 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:42,507 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:42,511 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:43,936 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:43,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530623387] [2021-05-06 11:23:43,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530623387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:43,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:43,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 11:23:43,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876956511] [2021-05-06 11:23:43,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 11:23:43,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:43,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 11:23:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:23:43,937 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 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) [2021-05-06 11:23:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:44,158 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-06 11:23:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 11:23:44,158 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 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 134 [2021-05-06 11:23:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:44,159 INFO L225 Difference]: With dead ends: 144 [2021-05-06 11:23:44,159 INFO L226 Difference]: Without dead ends: 138 [2021-05-06 11:23:44,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1353.6ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:23:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-06 11:23:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-06 11:23:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-06 11:23:44,161 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-06 11:23:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:44,162 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-06 11:23:44,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 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) [2021-05-06 11:23:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-06 11:23:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 11:23:44,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:44,162 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:44,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 11:23:44,162 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:44,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 62 times [2021-05-06 11:23:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:44,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677544307] [2021-05-06 11:23:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:44,166 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:44,167 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:44,167 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:45,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:45,593 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:45,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677544307] [2021-05-06 11:23:45,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677544307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:45,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:45,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 11:23:45,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518053211] [2021-05-06 11:23:45,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 11:23:45,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 11:23:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:23:45,600 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 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) [2021-05-06 11:23:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:45,832 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-06 11:23:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 11:23:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 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 136 [2021-05-06 11:23:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:45,833 INFO L225 Difference]: With dead ends: 146 [2021-05-06 11:23:45,833 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 11:23:45,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1372.4ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:23:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 11:23:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-06 11:23:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-06 11:23:45,836 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-06 11:23:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:45,836 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-06 11:23:45,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 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) [2021-05-06 11:23:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-06 11:23:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 11:23:45,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:45,836 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:45,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-06 11:23:45,837 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 63 times [2021-05-06 11:23:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:45,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32117946] [2021-05-06 11:23:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:45,847 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:45,847 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:45,847 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:47,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:47,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:47,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32117946] [2021-05-06 11:23:47,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [32117946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:47,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:47,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 11:23:47,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385684577] [2021-05-06 11:23:47,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 11:23:47,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:47,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 11:23:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:23:47,296 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 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) [2021-05-06 11:23:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:47,557 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-06 11:23:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 11:23:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 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 138 [2021-05-06 11:23:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:47,558 INFO L225 Difference]: With dead ends: 148 [2021-05-06 11:23:47,558 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 11:23:47,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1390.1ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:23:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 11:23:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-06 11:23:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-06 11:23:47,560 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-06 11:23:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:47,560 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-06 11:23:47,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 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) [2021-05-06 11:23:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-06 11:23:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 11:23:47,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:47,561 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:47,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-06 11:23:47,561 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 64 times [2021-05-06 11:23:47,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:47,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745072782] [2021-05-06 11:23:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:47,565 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:47,565 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:47,565 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:49,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:49,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:49,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745072782] [2021-05-06 11:23:49,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [745072782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:49,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:49,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 11:23:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155027127] [2021-05-06 11:23:49,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 11:23:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 11:23:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:23:49,058 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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) [2021-05-06 11:23:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:49,294 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-06 11:23:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 11:23:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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 140 [2021-05-06 11:23:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:49,295 INFO L225 Difference]: With dead ends: 150 [2021-05-06 11:23:49,295 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 11:23:49,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1443.8ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:23:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 11:23:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-05-06 11:23:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-06 11:23:49,298 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-06 11:23:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:49,298 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-06 11:23:49,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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) [2021-05-06 11:23:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-06 11:23:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 11:23:49,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:49,299 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:49,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-06 11:23:49,299 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 65 times [2021-05-06 11:23:49,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:49,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968410169] [2021-05-06 11:23:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:49,307 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:49,307 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:49,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:50,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:50,847 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968410169] [2021-05-06 11:23:50,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968410169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:50,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:50,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 11:23:50,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374712843] [2021-05-06 11:23:50,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 11:23:50,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:50,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 11:23:50,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:23:50,848 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 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) [2021-05-06 11:23:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:51,091 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-06 11:23:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 11:23:51,092 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 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 142 [2021-05-06 11:23:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:51,092 INFO L225 Difference]: With dead ends: 152 [2021-05-06 11:23:51,092 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 11:23:51,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1489.8ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:23:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 11:23:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-06 11:23:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-06 11:23:51,095 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-06 11:23:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:51,095 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-06 11:23:51,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 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) [2021-05-06 11:23:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-06 11:23:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-06 11:23:51,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:51,096 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:51,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-06 11:23:51,096 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 66 times [2021-05-06 11:23:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:51,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099733372] [2021-05-06 11:23:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:51,100 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:51,100 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:51,100 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:52,674 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:52,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099733372] [2021-05-06 11:23:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099733372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:52,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:52,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 11:23:52,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578929122] [2021-05-06 11:23:52,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 11:23:52,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 11:23:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:23:52,675 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 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) [2021-05-06 11:23:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:52,853 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-06 11:23:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 11:23:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 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 144 [2021-05-06 11:23:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:52,853 INFO L225 Difference]: With dead ends: 154 [2021-05-06 11:23:52,854 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 11:23:52,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1524.3ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:23:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 11:23:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-06 11:23:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-06 11:23:52,856 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-06 11:23:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:52,856 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-06 11:23:52,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 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) [2021-05-06 11:23:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-06 11:23:52,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 11:23:52,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:52,857 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:52,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 11:23:52,857 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1034597152, now seen corresponding path program 67 times [2021-05-06 11:23:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:52,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973350891] [2021-05-06 11:23:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:52,860 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:52,860 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:52,861 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:54,552 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:54,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973350891] [2021-05-06 11:23:54,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [973350891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:54,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:54,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 11:23:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757311444] [2021-05-06 11:23:54,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 11:23:54,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 11:23:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:23:54,553 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 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) [2021-05-06 11:23:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:54,789 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-06 11:23:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 11:23:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 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 146 [2021-05-06 11:23:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:54,790 INFO L225 Difference]: With dead ends: 156 [2021-05-06 11:23:54,790 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 11:23:54,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1617.9ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:23:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 11:23:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-06 11:23:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-06 11:23:54,792 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-06 11:23:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:54,792 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-06 11:23:54,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 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) [2021-05-06 11:23:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-06 11:23:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 11:23:54,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:54,793 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:54,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-06 11:23:54,793 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1236330306, now seen corresponding path program 68 times [2021-05-06 11:23:54,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:54,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069423685] [2021-05-06 11:23:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:54,800 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:54,800 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:54,800 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:56,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:56,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069423685] [2021-05-06 11:23:56,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1069423685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:56,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:56,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 11:23:56,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184132824] [2021-05-06 11:23:56,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 11:23:56,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:56,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 11:23:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:23:56,541 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 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) [2021-05-06 11:23:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:56,822 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-06 11:23:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 11:23:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 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 148 [2021-05-06 11:23:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:56,836 INFO L225 Difference]: With dead ends: 158 [2021-05-06 11:23:56,836 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 11:23:56,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1674.4ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:23:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 11:23:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-06 11:23:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-06 11:23:56,844 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-06 11:23:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:56,844 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-06 11:23:56,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 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) [2021-05-06 11:23:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-06 11:23:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-06 11:23:56,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:56,845 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:56,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-06 11:23:56,845 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:56,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1828362980, now seen corresponding path program 69 times [2021-05-06 11:23:56,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:56,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384723494] [2021-05-06 11:23:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:56,852 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:56,852 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:56,852 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:58,686 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384723494] [2021-05-06 11:23:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384723494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:58,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:58,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 11:23:58,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590632700] [2021-05-06 11:23:58,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 11:23:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 11:23:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:23:58,688 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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) [2021-05-06 11:23:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:58,868 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-06 11:23:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 11:23:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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 150 [2021-05-06 11:23:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:58,869 INFO L225 Difference]: With dead ends: 160 [2021-05-06 11:23:58,869 INFO L226 Difference]: Without dead ends: 154 [2021-05-06 11:23:58,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1733.3ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:23:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-06 11:23:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-06 11:23:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-06 11:23:58,871 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-06 11:23:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:58,872 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-06 11:23:58,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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) [2021-05-06 11:23:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-06 11:23:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-06 11:23:58,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:58,872 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:58,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-06 11:23:58,872 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash -458887674, now seen corresponding path program 70 times [2021-05-06 11:23:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:58,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551362306] [2021-05-06 11:23:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:58,879 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:58,879 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:58,880 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:00,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:00,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551362306] [2021-05-06 11:24:00,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [551362306] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:00,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:00,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 11:24:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178157164] [2021-05-06 11:24:00,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 11:24:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 11:24:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:24:00,668 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 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) [2021-05-06 11:24:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:00,945 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-06 11:24:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 11:24:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 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 152 [2021-05-06 11:24:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:00,946 INFO L225 Difference]: With dead ends: 162 [2021-05-06 11:24:00,947 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 11:24:00,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1731.4ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:24:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 11:24:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 11:24:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-06 11:24:00,949 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-06 11:24:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:00,949 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-06 11:24:00,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 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) [2021-05-06 11:24:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-06 11:24:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 11:24:00,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:00,950 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:00,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-06 11:24:00,950 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:00,950 INFO L82 PathProgramCache]: Analyzing trace with hash 516489384, now seen corresponding path program 71 times [2021-05-06 11:24:00,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:00,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816247734] [2021-05-06 11:24:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:00,954 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:00,954 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:00,954 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:02,770 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:02,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816247734] [2021-05-06 11:24:02,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816247734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:02,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:02,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 11:24:02,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677610833] [2021-05-06 11:24:02,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 11:24:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 11:24:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:24:02,771 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 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) [2021-05-06 11:24:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:02,981 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-06 11:24:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 11:24:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 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 154 [2021-05-06 11:24:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:02,982 INFO L225 Difference]: With dead ends: 164 [2021-05-06 11:24:02,982 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 11:24:02,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1760.2ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:24:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 11:24:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-06 11:24:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-06 11:24:02,988 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-06 11:24:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:02,988 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-06 11:24:02,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 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) [2021-05-06 11:24:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-06 11:24:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 11:24:02,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:02,989 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:02,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 11:24:02,989 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1550971594, now seen corresponding path program 72 times [2021-05-06 11:24:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:02,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316788997] [2021-05-06 11:24:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:02,993 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:02,993 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:02,994 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:04,898 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:04,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316788997] [2021-05-06 11:24:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [316788997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 11:24:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198868634] [2021-05-06 11:24:04,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 11:24:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 11:24:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:24:04,899 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 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) [2021-05-06 11:24:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:05,178 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-06 11:24:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 11:24:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 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 156 [2021-05-06 11:24:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:05,179 INFO L225 Difference]: With dead ends: 166 [2021-05-06 11:24:05,179 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 11:24:05,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:24:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 11:24:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-06 11:24:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-06 11:24:05,182 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-06 11:24:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:05,182 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-06 11:24:05,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 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) [2021-05-06 11:24:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-06 11:24:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 11:24:05,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:05,183 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:05,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-06 11:24:05,183 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash -744037268, now seen corresponding path program 73 times [2021-05-06 11:24:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:05,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006091811] [2021-05-06 11:24:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:05,191 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:05,191 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:05,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:07,111 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:07,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006091811] [2021-05-06 11:24:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006091811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:07,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:07,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 11:24:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413799218] [2021-05-06 11:24:07,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 11:24:07,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:07,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 11:24:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:24:07,113 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 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) [2021-05-06 11:24:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:07,401 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-06 11:24:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 11:24:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 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 158 [2021-05-06 11:24:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:07,402 INFO L225 Difference]: With dead ends: 168 [2021-05-06 11:24:07,402 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 11:24:07,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1859.7ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:24:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 11:24:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-06 11:24:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-06 11:24:07,405 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-06 11:24:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:07,405 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-06 11:24:07,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 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) [2021-05-06 11:24:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-06 11:24:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 11:24:07,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:07,405 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:07,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-06 11:24:07,406 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1365636494, now seen corresponding path program 74 times [2021-05-06 11:24:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:07,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880551103] [2021-05-06 11:24:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:07,415 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:07,415 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:07,415 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:09,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880551103] [2021-05-06 11:24:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880551103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:09,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:09,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 11:24:09,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118042041] [2021-05-06 11:24:09,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 11:24:09,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 11:24:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:24:09,378 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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) [2021-05-06 11:24:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:09,600 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-06 11:24:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 11:24:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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 160 [2021-05-06 11:24:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:09,601 INFO L225 Difference]: With dead ends: 170 [2021-05-06 11:24:09,601 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 11:24:09,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1905.5ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:24:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 11:24:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-06 11:24:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-06 11:24:09,603 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-06 11:24:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:09,603 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-06 11:24:09,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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) [2021-05-06 11:24:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-06 11:24:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 11:24:09,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:09,604 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:09,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-06 11:24:09,604 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1537558064, now seen corresponding path program 75 times [2021-05-06 11:24:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:09,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926515354] [2021-05-06 11:24:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:09,611 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:09,611 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:09,611 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:11,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:11,617 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926515354] [2021-05-06 11:24:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926515354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 11:24:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797971665] [2021-05-06 11:24:11,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 11:24:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 11:24:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:24:11,618 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 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) [2021-05-06 11:24:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:11,809 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-06 11:24:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 11:24:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 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 162 [2021-05-06 11:24:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:11,810 INFO L225 Difference]: With dead ends: 172 [2021-05-06 11:24:11,810 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 11:24:11,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1949.8ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:24:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 11:24:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-06 11:24:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-06 11:24:11,813 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-06 11:24:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:11,813 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-06 11:24:11,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 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) [2021-05-06 11:24:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-06 11:24:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-06 11:24:11,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:11,814 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:11,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-06 11:24:11,814 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -749537710, now seen corresponding path program 76 times [2021-05-06 11:24:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:11,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048045139] [2021-05-06 11:24:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:11,827 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:11,827 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:11,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:13,889 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:13,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048045139] [2021-05-06 11:24:13,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048045139] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:13,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:13,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 11:24:13,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161854516] [2021-05-06 11:24:13,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 11:24:13,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:13,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 11:24:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:24:13,890 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 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) [2021-05-06 11:24:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:14,078 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-06 11:24:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 11:24:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 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 164 [2021-05-06 11:24:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:14,079 INFO L225 Difference]: With dead ends: 174 [2021-05-06 11:24:14,079 INFO L226 Difference]: Without dead ends: 168 [2021-05-06 11:24:14,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2000.1ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:24:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-06 11:24:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-06 11:24:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-06 11:24:14,082 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-06 11:24:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:14,082 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-06 11:24:14,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 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) [2021-05-06 11:24:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-06 11:24:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 11:24:14,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:14,082 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:14,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 11:24:14,082 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:14,083 INFO L82 PathProgramCache]: Analyzing trace with hash 374679028, now seen corresponding path program 77 times [2021-05-06 11:24:14,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:14,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670283220] [2021-05-06 11:24:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:14,087 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:14,087 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:14,087 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:16,196 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670283220] [2021-05-06 11:24:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670283220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:16,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:16,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 11:24:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679218335] [2021-05-06 11:24:16,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 11:24:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 11:24:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:24:16,198 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 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) [2021-05-06 11:24:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:16,387 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-06 11:24:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 11:24:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 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 166 [2021-05-06 11:24:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:16,388 INFO L225 Difference]: With dead ends: 176 [2021-05-06 11:24:16,388 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 11:24:16,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2053.0ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:24:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 11:24:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-05-06 11:24:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-06 11:24:16,391 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-06 11:24:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:16,391 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-06 11:24:16,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 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) [2021-05-06 11:24:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-06 11:24:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-06 11:24:16,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:16,392 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:16,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-06 11:24:16,392 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1584794346, now seen corresponding path program 78 times [2021-05-06 11:24:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:16,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431322958] [2021-05-06 11:24:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:16,399 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:16,399 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:16,399 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:18,746 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:18,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431322958] [2021-05-06 11:24:18,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [431322958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:18,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:18,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 11:24:18,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179909641] [2021-05-06 11:24:18,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 11:24:18,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:18,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 11:24:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:24:18,748 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 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) [2021-05-06 11:24:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:18,949 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-06 11:24:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 11:24:18,950 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 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 168 [2021-05-06 11:24:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:18,950 INFO L225 Difference]: With dead ends: 178 [2021-05-06 11:24:18,950 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 11:24:18,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2287.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:24:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 11:24:18,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-06 11:24:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-06 11:24:18,967 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-06 11:24:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:18,967 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-06 11:24:18,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 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) [2021-05-06 11:24:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-06 11:24:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 11:24:18,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:18,968 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:18,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-06 11:24:18,968 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash 851936184, now seen corresponding path program 79 times [2021-05-06 11:24:18,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:18,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469041213] [2021-05-06 11:24:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:18,971 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:18,971 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:18,972 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:21,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:21,201 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:21,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469041213] [2021-05-06 11:24:21,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [469041213] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:21,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:21,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 11:24:21,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759493432] [2021-05-06 11:24:21,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 11:24:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 11:24:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:24:21,202 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 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) [2021-05-06 11:24:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:21,419 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-06 11:24:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 11:24:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 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 170 [2021-05-06 11:24:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:21,419 INFO L225 Difference]: With dead ends: 180 [2021-05-06 11:24:21,420 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 11:24:21,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2156.2ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:24:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 11:24:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-05-06 11:24:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-06 11:24:21,422 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-06 11:24:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:21,423 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-06 11:24:21,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 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) [2021-05-06 11:24:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-06 11:24:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-06 11:24:21,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:21,423 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:21,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-06 11:24:21,423 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799194, now seen corresponding path program 80 times [2021-05-06 11:24:21,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:21,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58705865] [2021-05-06 11:24:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:21,434 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:21,435 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:21,435 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:23,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:23,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:23,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58705865] [2021-05-06 11:24:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [58705865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:23,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 11:24:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116866163] [2021-05-06 11:24:23,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 11:24:23,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 11:24:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:24:23,703 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 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) [2021-05-06 11:24:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:23,976 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-06 11:24:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 11:24:23,977 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 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 172 [2021-05-06 11:24:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:23,977 INFO L225 Difference]: With dead ends: 182 [2021-05-06 11:24:23,977 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 11:24:23,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2204.0ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:24:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 11:24:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-05-06 11:24:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-06 11:24:23,980 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-06 11:24:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:23,980 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-06 11:24:23,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 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) [2021-05-06 11:24:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-06 11:24:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 11:24:23,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:23,981 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:23,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-06 11:24:23,981 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -275947652, now seen corresponding path program 81 times [2021-05-06 11:24:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:23,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523530072] [2021-05-06 11:24:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:23,991 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:23,991 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:23,992 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:26,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:26,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523530072] [2021-05-06 11:24:26,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [523530072] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:26,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:26,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 11:24:26,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939838170] [2021-05-06 11:24:26,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 11:24:26,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 11:24:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:24:26,335 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 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) [2021-05-06 11:24:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:26,678 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-06 11:24:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 11:24:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 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 174 [2021-05-06 11:24:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:26,679 INFO L225 Difference]: With dead ends: 184 [2021-05-06 11:24:26,679 INFO L226 Difference]: Without dead ends: 178 [2021-05-06 11:24:26,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2273.5ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:24:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-06 11:24:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-05-06 11:24:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-05-06 11:24:26,682 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-05-06 11:24:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:26,682 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-05-06 11:24:26,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 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) [2021-05-06 11:24:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-05-06 11:24:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 11:24:26,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:26,683 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:26,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 11:24:26,683 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 228191390, now seen corresponding path program 82 times [2021-05-06 11:24:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:26,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105585684] [2021-05-06 11:24:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:26,686 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:26,687 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:26,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:29,082 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105585684] [2021-05-06 11:24:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1105585684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:29,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:29,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 11:24:29,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425070876] [2021-05-06 11:24:29,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 11:24:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 11:24:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:24:29,083 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 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) [2021-05-06 11:24:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:29,295 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-06 11:24:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 11:24:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 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 176 [2021-05-06 11:24:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:29,296 INFO L225 Difference]: With dead ends: 186 [2021-05-06 11:24:29,296 INFO L226 Difference]: Without dead ends: 180 [2021-05-06 11:24:29,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2335.2ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:24:29,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-06 11:24:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-06 11:24:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-05-06 11:24:29,298 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-05-06 11:24:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:29,299 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-05-06 11:24:29,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 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) [2021-05-06 11:24:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-05-06 11:24:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 11:24:29,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:29,299 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:29,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-06 11:24:29,299 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -625493696, now seen corresponding path program 83 times [2021-05-06 11:24:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:29,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731581069] [2021-05-06 11:24:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:29,310 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:29,310 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:29,310 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:31,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:31,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731581069] [2021-05-06 11:24:31,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1731581069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:31,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:31,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 11:24:31,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073555165] [2021-05-06 11:24:31,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 11:24:31,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 11:24:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:24:31,725 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 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) [2021-05-06 11:24:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:32,009 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-06 11:24:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 11:24:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 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 178 [2021-05-06 11:24:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:32,011 INFO L225 Difference]: With dead ends: 188 [2021-05-06 11:24:32,011 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 11:24:32,011 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2352.3ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:24:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 11:24:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-05-06 11:24:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-05-06 11:24:32,013 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-05-06 11:24:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:32,013 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-05-06 11:24:32,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 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) [2021-05-06 11:24:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-05-06 11:24:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 11:24:32,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:32,014 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:32,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-06 11:24:32,014 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -678107806, now seen corresponding path program 84 times [2021-05-06 11:24:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:32,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369591376] [2021-05-06 11:24:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:32,019 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:32,019 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:32,019 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:34,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:34,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369591376] [2021-05-06 11:24:34,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [369591376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:34,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:34,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 11:24:34,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021550400] [2021-05-06 11:24:34,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 11:24:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 11:24:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:24:34,527 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 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) [2021-05-06 11:24:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:34,876 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-06 11:24:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 11:24:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 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 180 [2021-05-06 11:24:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:34,877 INFO L225 Difference]: With dead ends: 190 [2021-05-06 11:24:34,877 INFO L226 Difference]: Without dead ends: 184 [2021-05-06 11:24:34,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2444.7ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:24:34,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-06 11:24:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-05-06 11:24:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-05-06 11:24:34,879 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-05-06 11:24:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:34,880 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-05-06 11:24:34,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 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) [2021-05-06 11:24:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-05-06 11:24:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-06 11:24:34,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:34,880 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:34,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-06 11:24:34,880 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash 299340036, now seen corresponding path program 85 times [2021-05-06 11:24:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:34,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827206418] [2021-05-06 11:24:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:34,891 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:34,891 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:34,891 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:37,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:37,423 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827206418] [2021-05-06 11:24:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [827206418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:37,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:37,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 11:24:37,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639637358] [2021-05-06 11:24:37,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 11:24:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:37,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 11:24:37,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:24:37,424 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 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) [2021-05-06 11:24:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:37,724 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-06 11:24:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 11:24:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 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 182 [2021-05-06 11:24:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:37,725 INFO L225 Difference]: With dead ends: 192 [2021-05-06 11:24:37,725 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 11:24:37,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2468.3ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:24:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 11:24:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 11:24:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-05-06 11:24:37,728 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-05-06 11:24:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:37,728 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-05-06 11:24:37,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 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) [2021-05-06 11:24:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-05-06 11:24:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-06 11:24:37,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:37,729 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:37,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-06 11:24:37,729 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:37,730 INFO L82 PathProgramCache]: Analyzing trace with hash -971121626, now seen corresponding path program 86 times [2021-05-06 11:24:37,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:37,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815885117] [2021-05-06 11:24:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:37,744 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:37,744 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:37,745 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:40,368 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:40,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815885117] [2021-05-06 11:24:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815885117] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:40,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:40,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 11:24:40,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150130526] [2021-05-06 11:24:40,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 11:24:40,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 11:24:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:24:40,369 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 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) [2021-05-06 11:24:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:40,593 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-06 11:24:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 11:24:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 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 184 [2021-05-06 11:24:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:40,594 INFO L225 Difference]: With dead ends: 194 [2021-05-06 11:24:40,594 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 11:24:40,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2556.4ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:24:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 11:24:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-05-06 11:24:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-05-06 11:24:40,601 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-05-06 11:24:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:40,602 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-05-06 11:24:40,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 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) [2021-05-06 11:24:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-05-06 11:24:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-06 11:24:40,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:40,602 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:40,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-06 11:24:40,603 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2114066744, now seen corresponding path program 87 times [2021-05-06 11:24:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345880741] [2021-05-06 11:24:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:40,608 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:40,608 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:40,609 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:43,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:43,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:43,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345880741] [2021-05-06 11:24:43,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345880741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:43,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:43,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-06 11:24:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826747686] [2021-05-06 11:24:43,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 11:24:43,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 11:24:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:24:43,439 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 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) [2021-05-06 11:24:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:43,811 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-06 11:24:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 11:24:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 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 186 [2021-05-06 11:24:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:43,812 INFO L225 Difference]: With dead ends: 196 [2021-05-06 11:24:43,812 INFO L226 Difference]: Without dead ends: 190 [2021-05-06 11:24:43,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2759.3ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:24:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-06 11:24:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-05-06 11:24:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-05-06 11:24:43,815 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-05-06 11:24:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:43,815 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-05-06 11:24:43,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 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) [2021-05-06 11:24:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-05-06 11:24:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-06 11:24:43,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:43,816 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:43,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-06 11:24:43,816 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -972697366, now seen corresponding path program 88 times [2021-05-06 11:24:43,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:43,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840265706] [2021-05-06 11:24:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:43,819 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:43,819 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:43,820 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:46,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:46,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840265706] [2021-05-06 11:24:46,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [840265706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:46,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:46,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-06 11:24:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340179123] [2021-05-06 11:24:46,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 11:24:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 11:24:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:24:46,541 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 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) [2021-05-06 11:24:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:46,870 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-06 11:24:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 11:24:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 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 188 [2021-05-06 11:24:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:46,871 INFO L225 Difference]: With dead ends: 198 [2021-05-06 11:24:46,871 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 11:24:46,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2654.3ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:24:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 11:24:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-05-06 11:24:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-05-06 11:24:46,874 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-05-06 11:24:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:46,874 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-05-06 11:24:46,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 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) [2021-05-06 11:24:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-05-06 11:24:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-06 11:24:46,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:46,875 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:46,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-06 11:24:46,875 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 666614412, now seen corresponding path program 89 times [2021-05-06 11:24:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:46,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189554016] [2021-05-06 11:24:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:46,878 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:46,878 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:46,879 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:49,666 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:49,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189554016] [2021-05-06 11:24:49,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189554016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:49,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:49,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-06 11:24:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146436859] [2021-05-06 11:24:49,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 11:24:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 11:24:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:24:49,667 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 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) [2021-05-06 11:24:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:49,934 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-06 11:24:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 11:24:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 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 190 [2021-05-06 11:24:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:49,945 INFO L225 Difference]: With dead ends: 200 [2021-05-06 11:24:49,945 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 11:24:49,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2719.8ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:24:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 11:24:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-06 11:24:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-05-06 11:24:49,948 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-05-06 11:24:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:49,948 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-05-06 11:24:49,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 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) [2021-05-06 11:24:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-05-06 11:24:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-06 11:24:49,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:49,949 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:49,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-06 11:24:49,949 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash -207764562, now seen corresponding path program 90 times [2021-05-06 11:24:49,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:49,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964425859] [2021-05-06 11:24:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:49,960 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:49,960 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:49,961 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:52,813 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:52,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964425859] [2021-05-06 11:24:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [964425859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:52,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:52,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-06 11:24:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319729193] [2021-05-06 11:24:52,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 11:24:52,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 11:24:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:24:52,815 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 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) [2021-05-06 11:24:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:53,062 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-06 11:24:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 11:24:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 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 192 [2021-05-06 11:24:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:53,063 INFO L225 Difference]: With dead ends: 202 [2021-05-06 11:24:53,063 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 11:24:53,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2776.2ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:24:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 11:24:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-05-06 11:24:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-05-06 11:24:53,065 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-05-06 11:24:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:53,066 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-05-06 11:24:53,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 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) [2021-05-06 11:24:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-05-06 11:24:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 11:24:53,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:53,066 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:53,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-06 11:24:53,066 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1327631440, now seen corresponding path program 91 times [2021-05-06 11:24:53,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:53,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092403361] [2021-05-06 11:24:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:53,071 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:53,071 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:53,071 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:55,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:55,984 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:55,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092403361] [2021-05-06 11:24:55,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092403361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:55,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:55,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-06 11:24:55,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483799309] [2021-05-06 11:24:55,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 11:24:55,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 11:24:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:24:55,985 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 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) [2021-05-06 11:24:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:56,230 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-06 11:24:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-06 11:24:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 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 194 [2021-05-06 11:24:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:56,231 INFO L225 Difference]: With dead ends: 204 [2021-05-06 11:24:56,231 INFO L226 Difference]: Without dead ends: 198 [2021-05-06 11:24:56,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2838.7ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:24:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-06 11:24:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-05-06 11:24:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-05-06 11:24:56,233 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-05-06 11:24:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:56,234 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-05-06 11:24:56,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 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) [2021-05-06 11:24:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-05-06 11:24:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-06 11:24:56,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:56,234 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:56,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-06 11:24:56,235 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -625560462, now seen corresponding path program 92 times [2021-05-06 11:24:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:56,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635130515] [2021-05-06 11:24:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:56,242 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:56,243 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:56,243 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:59,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:59,212 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:59,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635130515] [2021-05-06 11:24:59,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635130515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:59,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:59,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-06 11:24:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680474068] [2021-05-06 11:24:59,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 11:24:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 11:24:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:24:59,214 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 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) [2021-05-06 11:24:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:59,465 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-06 11:24:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 11:24:59,465 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 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 196 [2021-05-06 11:24:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:59,466 INFO L225 Difference]: With dead ends: 206 [2021-05-06 11:24:59,466 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 11:24:59,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2899.6ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:24:59,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 11:24:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-05-06 11:24:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-05-06 11:24:59,469 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-05-06 11:24:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:59,469 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-05-06 11:24:59,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 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) [2021-05-06 11:24:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-05-06 11:24:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-06 11:24:59,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:59,470 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:59,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-06 11:24:59,470 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -742269932, now seen corresponding path program 93 times [2021-05-06 11:24:59,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:59,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495311695] [2021-05-06 11:24:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:59,476 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:59,476 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:59,476 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:02,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:02,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495311695] [2021-05-06 11:25:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [495311695] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:02,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:02,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-06 11:25:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601030843] [2021-05-06 11:25:02,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-06 11:25:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-06 11:25:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:25:02,504 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 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) [2021-05-06 11:25:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:02,781 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-06 11:25:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-06 11:25:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 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 198 [2021-05-06 11:25:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:02,783 INFO L225 Difference]: With dead ends: 208 [2021-05-06 11:25:02,783 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 11:25:02,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2959.1ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:25:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 11:25:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-05-06 11:25:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-05-06 11:25:02,785 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-05-06 11:25:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:02,786 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-05-06 11:25:02,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 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) [2021-05-06 11:25:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-05-06 11:25:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-06 11:25:02,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:02,786 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:02,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-06 11:25:02,786 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1230920906, now seen corresponding path program 94 times [2021-05-06 11:25:02,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:02,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044304810] [2021-05-06 11:25:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:02,790 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:02,790 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:02,791 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:05,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044304810] [2021-05-06 11:25:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044304810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:05,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:05,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-06 11:25:05,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804693984] [2021-05-06 11:25:05,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 11:25:05,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:05,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 11:25:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:25:05,968 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 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) [2021-05-06 11:25:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:06,328 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-05-06 11:25:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-06 11:25:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 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 200 [2021-05-06 11:25:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:06,329 INFO L225 Difference]: With dead ends: 210 [2021-05-06 11:25:06,329 INFO L226 Difference]: Without dead ends: 204 [2021-05-06 11:25:06,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3102.0ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:25:06,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-06 11:25:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-06 11:25:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-05-06 11:25:06,332 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-05-06 11:25:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:06,332 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-05-06 11:25:06,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 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) [2021-05-06 11:25:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-05-06 11:25:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-06 11:25:06,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:06,333 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:06,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-06 11:25:06,333 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1621895640, now seen corresponding path program 95 times [2021-05-06 11:25:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682433461] [2021-05-06 11:25:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:06,338 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:06,338 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:06,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:09,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:09,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682433461] [2021-05-06 11:25:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682433461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-06 11:25:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191132820] [2021-05-06 11:25:09,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-06 11:25:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-06 11:25:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:25:09,549 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 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) [2021-05-06 11:25:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:09,979 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-05-06 11:25:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-06 11:25:09,979 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 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 202 [2021-05-06 11:25:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:09,980 INFO L225 Difference]: With dead ends: 212 [2021-05-06 11:25:09,980 INFO L226 Difference]: Without dead ends: 206 [2021-05-06 11:25:09,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3138.9ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:25:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-06 11:25:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-05-06 11:25:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-05-06 11:25:09,983 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-05-06 11:25:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:09,983 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-05-06 11:25:09,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 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) [2021-05-06 11:25:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-05-06 11:25:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-06 11:25:09,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:09,984 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:09,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-06 11:25:09,984 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1305505798, now seen corresponding path program 96 times [2021-05-06 11:25:09,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:09,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79851840] [2021-05-06 11:25:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:09,991 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:09,991 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:09,991 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:13,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:13,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79851840] [2021-05-06 11:25:13,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [79851840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:13,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:13,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-06 11:25:13,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469168190] [2021-05-06 11:25:13,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-06 11:25:13,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-06 11:25:13,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:25:13,211 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 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) [2021-05-06 11:25:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:13,598 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-05-06 11:25:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-06 11:25:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 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 204 [2021-05-06 11:25:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:13,599 INFO L225 Difference]: With dead ends: 214 [2021-05-06 11:25:13,599 INFO L226 Difference]: Without dead ends: 208 [2021-05-06 11:25:13,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3143.7ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:25:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-06 11:25:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-06 11:25:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-05-06 11:25:13,602 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-05-06 11:25:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:13,602 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-05-06 11:25:13,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 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) [2021-05-06 11:25:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-05-06 11:25:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-06 11:25:13,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:13,603 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:13,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-06 11:25:13,603 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1334708836, now seen corresponding path program 97 times [2021-05-06 11:25:13,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:13,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666983521] [2021-05-06 11:25:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:13,606 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:13,606 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:13,607 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:16,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:16,903 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:16,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666983521] [2021-05-06 11:25:16,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666983521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:16,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:16,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-06 11:25:16,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037114132] [2021-05-06 11:25:16,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-06 11:25:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-06 11:25:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:25:16,904 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 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) [2021-05-06 11:25:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:17,247 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-05-06 11:25:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-06 11:25:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 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 206 [2021-05-06 11:25:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:17,248 INFO L225 Difference]: With dead ends: 216 [2021-05-06 11:25:17,248 INFO L226 Difference]: Without dead ends: 210 [2021-05-06 11:25:17,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3217.8ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:25:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-06 11:25:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-06 11:25:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-05-06 11:25:17,251 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-05-06 11:25:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:17,251 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-05-06 11:25:17,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 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) [2021-05-06 11:25:17,252 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-05-06 11:25:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-06 11:25:17,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:17,252 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:17,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-06 11:25:17,252 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 665942718, now seen corresponding path program 98 times [2021-05-06 11:25:17,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:17,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964391796] [2021-05-06 11:25:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:17,260 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:17,260 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:17,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:20,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:20,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964391796] [2021-05-06 11:25:20,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964391796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:20,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:20,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-06 11:25:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280296962] [2021-05-06 11:25:20,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-06 11:25:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-06 11:25:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:25:20,596 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 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) [2021-05-06 11:25:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:20,880 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-05-06 11:25:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 11:25:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 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 208 [2021-05-06 11:25:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:20,881 INFO L225 Difference]: With dead ends: 218 [2021-05-06 11:25:20,881 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 11:25:20,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3263.0ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:25:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 11:25:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-06 11:25:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-05-06 11:25:20,884 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-05-06 11:25:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:20,884 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-05-06 11:25:20,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 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) [2021-05-06 11:25:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-05-06 11:25:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-06 11:25:20,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:20,885 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:20,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-06 11:25:20,885 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash -853262496, now seen corresponding path program 99 times [2021-05-06 11:25:20,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:20,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086310509] [2021-05-06 11:25:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:20,890 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:20,890 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:20,890 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:24,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:24,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:24,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086310509] [2021-05-06 11:25:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086310509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:24,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:24,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-06 11:25:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931761483] [2021-05-06 11:25:24,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-06 11:25:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-06 11:25:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:25:24,259 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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) [2021-05-06 11:25:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:24,663 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-05-06 11:25:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-06 11:25:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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 210 [2021-05-06 11:25:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:24,665 INFO L225 Difference]: With dead ends: 220 [2021-05-06 11:25:24,665 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 11:25:24,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3294.7ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:25:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 11:25:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-05-06 11:25:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-05-06 11:25:24,668 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-05-06 11:25:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-05-06 11:25:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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) [2021-05-06 11:25:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-05-06 11:25:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 11:25:24,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:24,669 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:24,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-06 11:25:24,669 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash -520592510, now seen corresponding path program 100 times [2021-05-06 11:25:24,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675728256] [2021-05-06 11:25:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:24,673 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:24,673 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:24,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:28,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:28,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675728256] [2021-05-06 11:25:28,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675728256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:28,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:28,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-06 11:25:28,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419095629] [2021-05-06 11:25:28,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-06 11:25:28,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:28,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-06 11:25:28,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:25:28,192 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 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) [2021-05-06 11:25:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:28,613 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-05-06 11:25:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-06 11:25:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 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 212 [2021-05-06 11:25:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:28,615 INFO L225 Difference]: With dead ends: 222 [2021-05-06 11:25:28,615 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 11:25:28,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3442.2ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:25:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 11:25:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-05-06 11:25:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-05-06 11:25:28,618 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-05-06 11:25:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:28,618 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-05-06 11:25:28,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 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) [2021-05-06 11:25:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-05-06 11:25:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-06 11:25:28,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:28,619 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:28,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-06 11:25:28,619 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1347684132, now seen corresponding path program 101 times [2021-05-06 11:25:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:28,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28457681] [2021-05-06 11:25:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:28,623 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:28,623 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:28,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:32,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:32,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28457681] [2021-05-06 11:25:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [28457681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:32,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:32,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-06 11:25:32,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623545115] [2021-05-06 11:25:32,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-06 11:25:32,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-06 11:25:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:25:32,178 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 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) [2021-05-06 11:25:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:32,655 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-05-06 11:25:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-06 11:25:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 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 214 [2021-05-06 11:25:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:32,656 INFO L225 Difference]: With dead ends: 224 [2021-05-06 11:25:32,656 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 11:25:32,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3479.2ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:25:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 11:25:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-06 11:25:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-05-06 11:25:32,659 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-05-06 11:25:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:32,659 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-05-06 11:25:32,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 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) [2021-05-06 11:25:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-05-06 11:25:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-06 11:25:32,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:32,660 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:32,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-06 11:25:32,660 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1465207366, now seen corresponding path program 102 times [2021-05-06 11:25:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:32,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052047909] [2021-05-06 11:25:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:32,668 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:32,668 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:32,668 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:36,288 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:36,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052047909] [2021-05-06 11:25:36,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052047909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:36,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:36,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-06 11:25:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949910920] [2021-05-06 11:25:36,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 11:25:36,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:36,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 11:25:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:25:36,290 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 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) [2021-05-06 11:25:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:36,663 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-05-06 11:25:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-06 11:25:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 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 216 [2021-05-06 11:25:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:36,664 INFO L225 Difference]: With dead ends: 226 [2021-05-06 11:25:36,664 INFO L226 Difference]: Without dead ends: 220 [2021-05-06 11:25:36,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3544.0ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:25:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-06 11:25:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-05-06 11:25:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-05-06 11:25:36,667 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-05-06 11:25:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:36,667 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-05-06 11:25:36,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 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) [2021-05-06 11:25:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-05-06 11:25:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-06 11:25:36,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:36,668 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:36,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-06 11:25:36,668 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1559081752, now seen corresponding path program 103 times [2021-05-06 11:25:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:36,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430724520] [2021-05-06 11:25:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:36,671 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:36,671 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:36,672 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:40,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:40,334 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430724520] [2021-05-06 11:25:40,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [430724520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:40,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:40,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-06 11:25:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696534733] [2021-05-06 11:25:40,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-06 11:25:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-06 11:25:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:25:40,336 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 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) [2021-05-06 11:25:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:40,634 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-05-06 11:25:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-06 11:25:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 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 218 [2021-05-06 11:25:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:40,635 INFO L225 Difference]: With dead ends: 228 [2021-05-06 11:25:40,635 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 11:25:40,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3585.6ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:25:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 11:25:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-06 11:25:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-05-06 11:25:40,638 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-05-06 11:25:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-05-06 11:25:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 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) [2021-05-06 11:25:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-05-06 11:25:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-06 11:25:40,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:40,639 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:40,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-06 11:25:40,639 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -208064758, now seen corresponding path program 104 times [2021-05-06 11:25:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248004314] [2021-05-06 11:25:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:40,653 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:40,653 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:40,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:44,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:44,391 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248004314] [2021-05-06 11:25:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [248004314] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:44,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:44,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-06 11:25:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602723110] [2021-05-06 11:25:44,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-06 11:25:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-06 11:25:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:25:44,392 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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) [2021-05-06 11:25:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:44,696 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-05-06 11:25:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-06 11:25:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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 220 [2021-05-06 11:25:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:44,697 INFO L225 Difference]: With dead ends: 230 [2021-05-06 11:25:44,697 INFO L226 Difference]: Without dead ends: 224 [2021-05-06 11:25:44,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3655.1ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:25:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-06 11:25:44,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-05-06 11:25:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-05-06 11:25:44,700 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-05-06 11:25:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:44,700 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-05-06 11:25:44,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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) [2021-05-06 11:25:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-05-06 11:25:44,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-06 11:25:44,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:44,701 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:44,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-06 11:25:44,701 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1039143084, now seen corresponding path program 105 times [2021-05-06 11:25:44,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:44,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048335959] [2021-05-06 11:25:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:44,706 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:44,706 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:44,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:48,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048335959] [2021-05-06 11:25:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048335959] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:48,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:48,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-06 11:25:48,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663805933] [2021-05-06 11:25:48,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-06 11:25:48,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-06 11:25:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:25:48,644 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 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) [2021-05-06 11:25:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:48,966 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-05-06 11:25:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-06 11:25:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 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 222 [2021-05-06 11:25:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:48,967 INFO L225 Difference]: With dead ends: 232 [2021-05-06 11:25:48,967 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 11:25:48,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3852.6ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:25:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 11:25:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-05-06 11:25:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-05-06 11:25:48,970 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-05-06 11:25:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:48,970 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-05-06 11:25:48,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 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) [2021-05-06 11:25:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-05-06 11:25:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-06 11:25:48,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:48,971 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:48,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-06 11:25:48,971 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1310003662, now seen corresponding path program 106 times [2021-05-06 11:25:48,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:48,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185712694] [2021-05-06 11:25:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:48,975 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:48,975 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:48,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:52,861 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:52,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185712694] [2021-05-06 11:25:52,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185712694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:52,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:52,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-06 11:25:52,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575901118] [2021-05-06 11:25:52,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-06 11:25:52,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-06 11:25:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:25:52,863 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 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) [2021-05-06 11:25:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:53,159 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-05-06 11:25:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-06 11:25:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 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 224 [2021-05-06 11:25:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:53,160 INFO L225 Difference]: With dead ends: 234 [2021-05-06 11:25:53,160 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 11:25:53,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3803.9ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:25:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 11:25:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 11:25:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-05-06 11:25:53,163 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-05-06 11:25:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:53,163 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-05-06 11:25:53,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 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) [2021-05-06 11:25:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-05-06 11:25:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-06 11:25:53,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:53,164 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:53,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-06 11:25:53,164 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -385985936, now seen corresponding path program 107 times [2021-05-06 11:25:53,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:53,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111103824] [2021-05-06 11:25:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:53,167 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:53,168 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:53,168 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:57,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:57,144 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:57,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111103824] [2021-05-06 11:25:57,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111103824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:57,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:57,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-06 11:25:57,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667833221] [2021-05-06 11:25:57,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-06 11:25:57,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:57,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-06 11:25:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:25:57,146 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 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) [2021-05-06 11:25:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:57,454 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-05-06 11:25:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-06 11:25:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 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 226 [2021-05-06 11:25:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:57,455 INFO L225 Difference]: With dead ends: 236 [2021-05-06 11:25:57,455 INFO L226 Difference]: Without dead ends: 230 [2021-05-06 11:25:57,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3893.3ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:25:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-06 11:25:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-05-06 11:25:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-05-06 11:25:57,458 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-05-06 11:25:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:57,458 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-05-06 11:25:57,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 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) [2021-05-06 11:25:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-05-06 11:25:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-06 11:25:57,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:57,459 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:57,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-06 11:25:57,459 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:57,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1855582866, now seen corresponding path program 108 times [2021-05-06 11:25:57,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:57,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854218713] [2021-05-06 11:25:57,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:57,470 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:57,470 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:57,470 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:01,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:01,495 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:01,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854218713] [2021-05-06 11:26:01,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854218713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:01,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:01,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-06 11:26:01,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448294416] [2021-05-06 11:26:01,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-06 11:26:01,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-06 11:26:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:26:01,497 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 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) [2021-05-06 11:26:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:01,860 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-05-06 11:26:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-06 11:26:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 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 228 [2021-05-06 11:26:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:01,861 INFO L225 Difference]: With dead ends: 238 [2021-05-06 11:26:01,861 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 11:26:01,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3935.8ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:26:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 11:26:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-05-06 11:26:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-05-06 11:26:01,864 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-05-06 11:26:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:01,864 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-05-06 11:26:01,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 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) [2021-05-06 11:26:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-05-06 11:26:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 11:26:01,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:01,865 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:01,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-06 11:26:01,865 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash -70381004, now seen corresponding path program 109 times [2021-05-06 11:26:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:01,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139327602] [2021-05-06 11:26:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:01,869 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:01,869 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:01,870 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:05,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:05,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139327602] [2021-05-06 11:26:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [139327602] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:05,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:05,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-06 11:26:05,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460589620] [2021-05-06 11:26:05,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-06 11:26:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-06 11:26:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:26:05,987 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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) [2021-05-06 11:26:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:06,463 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-05-06 11:26:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-06 11:26:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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 230 [2021-05-06 11:26:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:06,464 INFO L225 Difference]: With dead ends: 240 [2021-05-06 11:26:06,464 INFO L226 Difference]: Without dead ends: 234 [2021-05-06 11:26:06,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4031.1ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:26:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-06 11:26:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-05-06 11:26:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-05-06 11:26:06,467 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-05-06 11:26:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:06,467 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-05-06 11:26:06,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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) [2021-05-06 11:26:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-05-06 11:26:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-06 11:26:06,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:06,468 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:06,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-06 11:26:06,468 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash 209244502, now seen corresponding path program 110 times [2021-05-06 11:26:06,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:06,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859017864] [2021-05-06 11:26:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:06,478 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:06,479 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:06,479 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:10,634 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:10,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859017864] [2021-05-06 11:26:10,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859017864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:10,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:10,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-06 11:26:10,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146519277] [2021-05-06 11:26:10,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-06 11:26:10,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-06 11:26:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:26:10,636 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 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) [2021-05-06 11:26:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:11,184 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-05-06 11:26:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-06 11:26:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 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 232 [2021-05-06 11:26:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:11,185 INFO L225 Difference]: With dead ends: 242 [2021-05-06 11:26:11,185 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 11:26:11,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4075.1ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:26:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 11:26:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-06 11:26:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-05-06 11:26:11,188 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-05-06 11:26:11,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:11,188 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-05-06 11:26:11,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 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) [2021-05-06 11:26:11,188 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-05-06 11:26:11,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-06 11:26:11,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:11,189 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:11,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-06 11:26:11,189 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1653583880, now seen corresponding path program 111 times [2021-05-06 11:26:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:11,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360476754] [2021-05-06 11:26:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:11,192 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:11,192 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:11,193 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:15,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:15,440 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360476754] [2021-05-06 11:26:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [360476754] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:15,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:15,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-06 11:26:15,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286713143] [2021-05-06 11:26:15,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-06 11:26:15,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-06 11:26:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:26:15,442 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 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) [2021-05-06 11:26:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:15,925 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-05-06 11:26:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-06 11:26:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 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 234 [2021-05-06 11:26:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:15,926 INFO L225 Difference]: With dead ends: 244 [2021-05-06 11:26:15,926 INFO L226 Difference]: Without dead ends: 238 [2021-05-06 11:26:15,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4165.7ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:26:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-06 11:26:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-05-06 11:26:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-05-06 11:26:15,929 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-05-06 11:26:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:15,929 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-05-06 11:26:15,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 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) [2021-05-06 11:26:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-05-06 11:26:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-06 11:26:15,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:15,930 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:15,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-06 11:26:15,930 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -830296550, now seen corresponding path program 112 times [2021-05-06 11:26:15,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:15,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441568673] [2021-05-06 11:26:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:15,933 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:15,933 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:15,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:20,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:20,268 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:20,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441568673] [2021-05-06 11:26:20,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1441568673] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:20,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:20,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-06 11:26:20,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132205820] [2021-05-06 11:26:20,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-06 11:26:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-06 11:26:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:26:20,270 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 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) [2021-05-06 11:26:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:20,843 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-05-06 11:26:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-06 11:26:20,843 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 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 236 [2021-05-06 11:26:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:20,844 INFO L225 Difference]: With dead ends: 246 [2021-05-06 11:26:20,844 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 11:26:20,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4251.3ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:26:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 11:26:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-06 11:26:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-05-06 11:26:20,847 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-05-06 11:26:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:20,847 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-05-06 11:26:20,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 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) [2021-05-06 11:26:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-05-06 11:26:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-06 11:26:20,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:20,848 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:20,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-06 11:26:20,848 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash 74845116, now seen corresponding path program 113 times [2021-05-06 11:26:20,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:20,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432541184] [2021-05-06 11:26:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:20,851 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:20,851 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:20,852 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:25,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:25,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:25,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432541184] [2021-05-06 11:26:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [432541184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:25,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-06 11:26:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933652466] [2021-05-06 11:26:25,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-06 11:26:25,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-06 11:26:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:26:25,217 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 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) [2021-05-06 11:26:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:25,515 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-05-06 11:26:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-06 11:26:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 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 238 [2021-05-06 11:26:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:25,516 INFO L225 Difference]: With dead ends: 248 [2021-05-06 11:26:25,516 INFO L226 Difference]: Without dead ends: 242 [2021-05-06 11:26:25,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4273.6ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:26:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-06 11:26:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-05-06 11:26:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-05-06 11:26:25,519 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-05-06 11:26:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:25,519 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-05-06 11:26:25,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 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) [2021-05-06 11:26:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-05-06 11:26:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-06 11:26:25,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:25,520 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:25,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-06 11:26:25,520 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1962374946, now seen corresponding path program 114 times [2021-05-06 11:26:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:25,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703389268] [2021-05-06 11:26:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:25,523 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:25,523 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:25,523 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:29,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:29,981 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:29,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703389268] [2021-05-06 11:26:29,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [703389268] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:29,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:29,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-06 11:26:29,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913326623] [2021-05-06 11:26:29,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-06 11:26:29,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-06 11:26:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:26:29,982 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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) [2021-05-06 11:26:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:30,482 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-05-06 11:26:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-06 11:26:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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 240 [2021-05-06 11:26:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:30,483 INFO L225 Difference]: With dead ends: 250 [2021-05-06 11:26:30,483 INFO L226 Difference]: Without dead ends: 244 [2021-05-06 11:26:30,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4372.5ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:26:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-06 11:26:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-06 11:26:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-05-06 11:26:30,486 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-05-06 11:26:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:30,486 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-05-06 11:26:30,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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) [2021-05-06 11:26:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-05-06 11:26:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-06 11:26:30,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:30,487 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:30,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-06 11:26:30,487 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:30,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:30,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1225767552, now seen corresponding path program 115 times [2021-05-06 11:26:30,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:30,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345610884] [2021-05-06 11:26:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:30,490 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:30,490 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:30,491 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:35,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:35,052 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:35,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345610884] [2021-05-06 11:26:35,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345610884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:35,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:35,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-06 11:26:35,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848374345] [2021-05-06 11:26:35,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-06 11:26:35,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:35,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-06 11:26:35,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:26:35,053 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 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) [2021-05-06 11:26:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:35,500 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-05-06 11:26:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-06 11:26:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 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 242 [2021-05-06 11:26:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:35,501 INFO L225 Difference]: With dead ends: 252 [2021-05-06 11:26:35,501 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 11:26:35,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4474.7ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:26:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 11:26:35,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-06 11:26:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-05-06 11:26:35,504 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-05-06 11:26:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:35,504 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-05-06 11:26:35,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 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) [2021-05-06 11:26:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-05-06 11:26:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-06 11:26:35,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:35,505 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:35,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-06 11:26:35,505 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2015665758, now seen corresponding path program 116 times [2021-05-06 11:26:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:35,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904208649] [2021-05-06 11:26:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:35,508 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:35,508 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:35,509 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:40,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:40,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904208649] [2021-05-06 11:26:40,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1904208649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:40,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:40,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-06 11:26:40,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114126937] [2021-05-06 11:26:40,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-06 11:26:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:40,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-06 11:26:40,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:26:40,186 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 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) [2021-05-06 11:26:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:40,519 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-05-06 11:26:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-06 11:26:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 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 244 [2021-05-06 11:26:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:40,520 INFO L225 Difference]: With dead ends: 254 [2021-05-06 11:26:40,520 INFO L226 Difference]: Without dead ends: 248 [2021-05-06 11:26:40,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4578.6ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:26:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-06 11:26:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-05-06 11:26:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:40,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-05-06 11:26:40,523 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-05-06 11:26:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:40,523 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-05-06 11:26:40,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 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) [2021-05-06 11:26:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-05-06 11:26:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-06 11:26:40,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:40,524 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:40,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-06 11:26:40,524 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:40,524 INFO L82 PathProgramCache]: Analyzing trace with hash -898630332, now seen corresponding path program 117 times [2021-05-06 11:26:40,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:40,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838139750] [2021-05-06 11:26:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:40,529 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:40,529 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:40,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:45,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:45,237 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:45,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838139750] [2021-05-06 11:26:45,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838139750] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:45,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:45,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-06 11:26:45,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324581922] [2021-05-06 11:26:45,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-06 11:26:45,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-06 11:26:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:26:45,239 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 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) [2021-05-06 11:26:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:45,784 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-05-06 11:26:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-06 11:26:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 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 246 [2021-05-06 11:26:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:45,785 INFO L225 Difference]: With dead ends: 256 [2021-05-06 11:26:45,785 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 11:26:45,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4616.9ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:26:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 11:26:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-06 11:26:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-05-06 11:26:45,788 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-05-06 11:26:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:45,788 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-05-06 11:26:45,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 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) [2021-05-06 11:26:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-05-06 11:26:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 11:26:45,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:45,789 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:45,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-06 11:26:45,789 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1169409946, now seen corresponding path program 118 times [2021-05-06 11:26:45,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:45,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467661321] [2021-05-06 11:26:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:45,795 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:45,795 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:45,796 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:50,648 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:50,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467661321] [2021-05-06 11:26:50,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [467661321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:50,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:50,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-06 11:26:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844494777] [2021-05-06 11:26:50,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-06 11:26:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-06 11:26:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:26:50,649 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 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) [2021-05-06 11:26:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:51,183 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-05-06 11:26:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-06 11:26:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 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 248 [2021-05-06 11:26:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:51,184 INFO L225 Difference]: With dead ends: 258 [2021-05-06 11:26:51,184 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 11:26:51,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4761.7ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:26:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 11:26:51,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-05-06 11:26:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-05-06 11:26:51,187 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-05-06 11:26:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:51,187 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-05-06 11:26:51,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 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) [2021-05-06 11:26:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-05-06 11:26:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-06 11:26:51,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:51,188 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:51,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-06 11:26:51,188 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash 604386056, now seen corresponding path program 119 times [2021-05-06 11:26:51,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:51,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883733903] [2021-05-06 11:26:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:51,191 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:51,192 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:51,192 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:56,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:56,036 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:56,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883733903] [2021-05-06 11:26:56,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883733903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:56,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:56,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-06 11:26:56,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332895926] [2021-05-06 11:26:56,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-06 11:26:56,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:56,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-06 11:26:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:26:56,038 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 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) [2021-05-06 11:26:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:56,592 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-05-06 11:26:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-06 11:26:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 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 250 [2021-05-06 11:26:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:56,593 INFO L225 Difference]: With dead ends: 260 [2021-05-06 11:26:56,593 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 11:26:56,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4745.3ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:26:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 11:26:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-06 11:26:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-05-06 11:26:56,596 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-05-06 11:26:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:56,596 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-05-06 11:26:56,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 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) [2021-05-06 11:26:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-05-06 11:26:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-06 11:26:56,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:56,597 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:56,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-06 11:26:56,597 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 120327466, now seen corresponding path program 120 times [2021-05-06 11:26:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:56,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531688670] [2021-05-06 11:26:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:56,600 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:56,600 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:56,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:01,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:01,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531688670] [2021-05-06 11:27:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [531688670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:01,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:01,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-06 11:27:01,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626761565] [2021-05-06 11:27:01,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-06 11:27:01,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-06 11:27:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:27:01,586 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 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) [2021-05-06 11:27:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:02,165 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-05-06 11:27:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-06 11:27:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 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 252 [2021-05-06 11:27:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:02,166 INFO L225 Difference]: With dead ends: 262 [2021-05-06 11:27:02,166 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 11:27:02,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4889.5ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:27:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 11:27:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-05-06 11:27:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-05-06 11:27:02,189 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-05-06 11:27:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:02,189 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-05-06 11:27:02,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 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) [2021-05-06 11:27:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-05-06 11:27:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-06 11:27:02,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:02,190 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:02,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-06 11:27:02,190 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1203509556, now seen corresponding path program 121 times [2021-05-06 11:27:02,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:02,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7257718] [2021-05-06 11:27:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:02,198 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:02,199 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:02,199 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:08,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:08,308 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:08,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7257718] [2021-05-06 11:27:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [7257718] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:08,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:08,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-06 11:27:08,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609187558] [2021-05-06 11:27:08,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-06 11:27:08,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-06 11:27:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:27:08,310 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 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) [2021-05-06 11:27:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:08,913 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-05-06 11:27:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-06 11:27:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 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 254 [2021-05-06 11:27:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:08,914 INFO L225 Difference]: With dead ends: 264 [2021-05-06 11:27:08,914 INFO L226 Difference]: Without dead ends: 258 [2021-05-06 11:27:08,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 5944.5ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:27:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-06 11:27:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-05-06 11:27:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-05-06 11:27:08,932 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-05-06 11:27:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:08,932 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-05-06 11:27:08,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 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) [2021-05-06 11:27:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-05-06 11:27:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-06 11:27:08,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:08,948 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:08,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-06 11:27:08,948 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2100568082, now seen corresponding path program 122 times [2021-05-06 11:27:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314223764] [2021-05-06 11:27:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:08,952 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:08,952 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:08,953 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:14,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:14,116 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:14,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314223764] [2021-05-06 11:27:14,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314223764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:14,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:14,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-06 11:27:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654503501] [2021-05-06 11:27:14,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-06 11:27:14,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:14,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-06 11:27:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:27:14,118 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 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) [2021-05-06 11:27:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:14,515 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-05-06 11:27:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-06 11:27:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 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 256 [2021-05-06 11:27:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:14,516 INFO L225 Difference]: With dead ends: 266 [2021-05-06 11:27:14,516 INFO L226 Difference]: Without dead ends: 260 [2021-05-06 11:27:14,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5058.0ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:27:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-06 11:27:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-05-06 11:27:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-05-06 11:27:14,519 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-05-06 11:27:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:14,520 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-05-06 11:27:14,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 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) [2021-05-06 11:27:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-05-06 11:27:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-06 11:27:14,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:14,520 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:14,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-06 11:27:14,521 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash -885385072, now seen corresponding path program 123 times [2021-05-06 11:27:14,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:14,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693407360] [2021-05-06 11:27:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:14,524 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:14,524 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:14,524 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:19,681 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:19,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693407360] [2021-05-06 11:27:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693407360] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:19,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:19,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-06 11:27:19,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820182655] [2021-05-06 11:27:19,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-06 11:27:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:19,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-06 11:27:19,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:27:19,683 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 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) [2021-05-06 11:27:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:20,214 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-05-06 11:27:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-06 11:27:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 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 258 [2021-05-06 11:27:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:20,215 INFO L225 Difference]: With dead ends: 268 [2021-05-06 11:27:20,215 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 11:27:20,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 5063.2ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:27:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 11:27:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-05-06 11:27:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-05-06 11:27:20,218 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-05-06 11:27:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:20,218 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-05-06 11:27:20,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 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) [2021-05-06 11:27:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-05-06 11:27:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-06 11:27:20,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:20,219 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:20,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-06 11:27:20,219 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1325616974, now seen corresponding path program 124 times [2021-05-06 11:27:20,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:20,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658013674] [2021-05-06 11:27:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:20,223 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:20,223 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:20,223 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:25,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:25,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:25,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658013674] [2021-05-06 11:27:25,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658013674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:25,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:25,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-06 11:27:25,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598531252] [2021-05-06 11:27:25,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-06 11:27:25,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-06 11:27:25,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:27:25,512 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 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) [2021-05-06 11:27:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:25,943 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-05-06 11:27:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-06 11:27:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 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 260 [2021-05-06 11:27:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:25,944 INFO L225 Difference]: With dead ends: 270 [2021-05-06 11:27:25,944 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 11:27:25,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5187.7ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:27:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 11:27:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-05-06 11:27:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-05-06 11:27:25,947 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-05-06 11:27:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:25,947 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-05-06 11:27:25,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 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) [2021-05-06 11:27:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-05-06 11:27:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-06 11:27:25,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:25,948 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:25,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-06 11:27:25,948 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash 813287508, now seen corresponding path program 125 times [2021-05-06 11:27:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:25,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774828553] [2021-05-06 11:27:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:25,959 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:25,959 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:25,964 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:31,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:31,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774828553] [2021-05-06 11:27:31,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1774828553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:31,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:31,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-06 11:27:31,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179613398] [2021-05-06 11:27:31,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-06 11:27:31,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-06 11:27:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:27:31,334 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 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) [2021-05-06 11:27:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:31,830 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-05-06 11:27:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-06 11:27:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 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 262 [2021-05-06 11:27:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:31,831 INFO L225 Difference]: With dead ends: 272 [2021-05-06 11:27:31,831 INFO L226 Difference]: Without dead ends: 266 [2021-05-06 11:27:31,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5269.0ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:27:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-06 11:27:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-06 11:27:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-05-06 11:27:31,834 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-05-06 11:27:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:31,834 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-05-06 11:27:31,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 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) [2021-05-06 11:27:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-05-06 11:27:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-06 11:27:31,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:31,835 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:31,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-06 11:27:31,835 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:31,842 INFO L82 PathProgramCache]: Analyzing trace with hash -988840074, now seen corresponding path program 126 times [2021-05-06 11:27:31,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:31,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479630801] [2021-05-06 11:27:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:31,847 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:31,847 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:31,848 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:37,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:37,313 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:37,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479630801] [2021-05-06 11:27:37,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479630801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:37,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:37,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-06 11:27:37,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267234368] [2021-05-06 11:27:37,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-06 11:27:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-06 11:27:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:27:37,316 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 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) [2021-05-06 11:27:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:37,878 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-05-06 11:27:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-06 11:27:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 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 264 [2021-05-06 11:27:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:37,880 INFO L225 Difference]: With dead ends: 274 [2021-05-06 11:27:37,880 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 11:27:37,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5361.9ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:27:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 11:27:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-05-06 11:27:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-05-06 11:27:37,883 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-05-06 11:27:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:37,884 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-05-06 11:27:37,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 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) [2021-05-06 11:27:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-05-06 11:27:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 11:27:37,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:37,884 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:37,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-06 11:27:37,885 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1961626088, now seen corresponding path program 127 times [2021-05-06 11:27:37,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:37,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395229839] [2021-05-06 11:27:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:37,888 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:37,888 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:37,889 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:43,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395229839] [2021-05-06 11:27:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [395229839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-06 11:27:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667625370] [2021-05-06 11:27:43,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-06 11:27:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-06 11:27:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:27:43,525 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 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) [2021-05-06 11:27:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:44,215 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2021-05-06 11:27:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-06 11:27:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 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 266 [2021-05-06 11:27:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:44,216 INFO L225 Difference]: With dead ends: 276 [2021-05-06 11:27:44,216 INFO L226 Difference]: Without dead ends: 270 [2021-05-06 11:27:44,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5528.1ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:27:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-06 11:27:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-05-06 11:27:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-05-06 11:27:44,219 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-05-06 11:27:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:44,220 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-05-06 11:27:44,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 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) [2021-05-06 11:27:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-05-06 11:27:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-06 11:27:44,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:44,220 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:44,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-06 11:27:44,221 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash -506115014, now seen corresponding path program 128 times [2021-05-06 11:27:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:44,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888441651] [2021-05-06 11:27:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:44,224 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:44,225 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:44,225 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:50,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:50,154 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888441651] [2021-05-06 11:27:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888441651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:50,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:50,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-06 11:27:50,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61482585] [2021-05-06 11:27:50,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-06 11:27:50,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:50,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-06 11:27:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:27:50,156 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 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) [2021-05-06 11:27:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:50,560 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-05-06 11:27:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-06 11:27:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 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 268 [2021-05-06 11:27:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:50,561 INFO L225 Difference]: With dead ends: 278 [2021-05-06 11:27:50,561 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 11:27:50,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5817.0ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:27:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 11:27:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-05-06 11:27:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2021-05-06 11:27:50,565 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2021-05-06 11:27:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:50,565 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2021-05-06 11:27:50,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 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) [2021-05-06 11:27:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2021-05-06 11:27:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-06 11:27:50,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:50,566 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:50,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-06 11:27:50,566 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1919311396, now seen corresponding path program 129 times [2021-05-06 11:27:50,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:50,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485522802] [2021-05-06 11:27:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:50,570 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:50,570 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:50,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:56,902 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:56,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485522802] [2021-05-06 11:27:56,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485522802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:56,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:56,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-06 11:27:56,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312652322] [2021-05-06 11:27:56,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-06 11:27:56,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-06 11:27:56,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:27:56,904 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 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) [2021-05-06 11:27:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:57,346 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2021-05-06 11:27:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-06 11:27:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 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 270 [2021-05-06 11:27:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:57,347 INFO L225 Difference]: With dead ends: 280 [2021-05-06 11:27:57,347 INFO L226 Difference]: Without dead ends: 274 [2021-05-06 11:27:57,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 6194.9ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:27:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-06 11:27:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-05-06 11:27:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2021-05-06 11:27:57,350 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2021-05-06 11:27:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:57,350 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2021-05-06 11:27:57,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 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) [2021-05-06 11:27:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2021-05-06 11:27:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-06 11:27:57,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:57,351 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:57,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-06 11:27:57,351 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1503598334, now seen corresponding path program 130 times [2021-05-06 11:27:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:57,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111516826] [2021-05-06 11:27:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:57,355 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:57,356 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:57,356 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:03,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:03,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111516826] [2021-05-06 11:28:03,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [111516826] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:03,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:03,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-06 11:28:03,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284460150] [2021-05-06 11:28:03,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-06 11:28:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-06 11:28:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:28:03,104 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 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) [2021-05-06 11:28:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:03,790 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2021-05-06 11:28:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-06 11:28:03,791 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 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 272 [2021-05-06 11:28:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:03,791 INFO L225 Difference]: With dead ends: 282 [2021-05-06 11:28:03,791 INFO L226 Difference]: Without dead ends: 276 [2021-05-06 11:28:03,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5645.7ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:28:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-06 11:28:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-06 11:28:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-05-06 11:28:03,795 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2021-05-06 11:28:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:03,795 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-05-06 11:28:03,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 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) [2021-05-06 11:28:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-05-06 11:28:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-06 11:28:03,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:03,796 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:03,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-06 11:28:03,796 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash 974900128, now seen corresponding path program 131 times [2021-05-06 11:28:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:03,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516027713] [2021-05-06 11:28:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:03,799 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:03,799 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:03,800 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:09,675 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516027713] [2021-05-06 11:28:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [516027713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:09,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:09,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-06 11:28:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867371531] [2021-05-06 11:28:09,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-06 11:28:09,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-06 11:28:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:28:09,677 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 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) [2021-05-06 11:28:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:10,314 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2021-05-06 11:28:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-06 11:28:10,315 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 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 274 [2021-05-06 11:28:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:10,315 INFO L225 Difference]: With dead ends: 284 [2021-05-06 11:28:10,315 INFO L226 Difference]: Without dead ends: 278 [2021-05-06 11:28:10,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5770.8ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:28:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-06 11:28:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-05-06 11:28:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2021-05-06 11:28:10,319 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2021-05-06 11:28:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:10,319 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2021-05-06 11:28:10,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 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) [2021-05-06 11:28:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2021-05-06 11:28:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-06 11:28:10,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:10,320 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:10,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-06 11:28:10,320 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash -297934910, now seen corresponding path program 132 times [2021-05-06 11:28:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:10,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522950524] [2021-05-06 11:28:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:10,323 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:10,324 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:10,324 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:16,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:16,316 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:16,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522950524] [2021-05-06 11:28:16,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [522950524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:16,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:16,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-06 11:28:16,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531554512] [2021-05-06 11:28:16,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-06 11:28:16,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:16,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-06 11:28:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:28:16,319 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 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) [2021-05-06 11:28:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:16,940 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-05-06 11:28:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-06 11:28:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 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 276 [2021-05-06 11:28:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:16,941 INFO L225 Difference]: With dead ends: 286 [2021-05-06 11:28:16,942 INFO L226 Difference]: Without dead ends: 280 [2021-05-06 11:28:16,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5872.7ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:28:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-06 11:28:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-05-06 11:28:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2021-05-06 11:28:16,945 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2021-05-06 11:28:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:16,945 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2021-05-06 11:28:16,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 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) [2021-05-06 11:28:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2021-05-06 11:28:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-06 11:28:16,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:16,946 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:16,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-06 11:28:16,946 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash 573272932, now seen corresponding path program 133 times [2021-05-06 11:28:16,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529705594] [2021-05-06 11:28:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:16,950 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:16,950 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:16,950 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:22,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:22,997 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:22,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529705594] [2021-05-06 11:28:22,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529705594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:22,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:22,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-06 11:28:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772014572] [2021-05-06 11:28:22,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-06 11:28:22,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-06 11:28:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:28:22,999 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 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) [2021-05-06 11:28:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:23,651 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2021-05-06 11:28:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-06 11:28:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 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 278 [2021-05-06 11:28:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:23,652 INFO L225 Difference]: With dead ends: 288 [2021-05-06 11:28:23,652 INFO L226 Difference]: Without dead ends: 282 [2021-05-06 11:28:23,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5937.4ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:28:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-06 11:28:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-05-06 11:28:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-05-06 11:28:23,656 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2021-05-06 11:28:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:23,656 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-05-06 11:28:23,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 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) [2021-05-06 11:28:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-05-06 11:28:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-06 11:28:23,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:23,657 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:23,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-06 11:28:23,657 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 285386374, now seen corresponding path program 134 times [2021-05-06 11:28:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196478761] [2021-05-06 11:28:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:23,663 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:23,663 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:23,663 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:29,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:29,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:29,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196478761] [2021-05-06 11:28:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1196478761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:29,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:29,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-06 11:28:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670867096] [2021-05-06 11:28:29,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-06 11:28:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-06 11:28:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:28:29,775 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 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) [2021-05-06 11:28:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:30,445 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2021-05-06 11:28:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-06 11:28:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 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 280 [2021-05-06 11:28:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:30,446 INFO L225 Difference]: With dead ends: 290 [2021-05-06 11:28:30,446 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 11:28:30,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5995.3ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:28:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 11:28:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-05-06 11:28:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-05-06 11:28:30,450 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2021-05-06 11:28:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:30,450 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-05-06 11:28:30,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 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) [2021-05-06 11:28:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-05-06 11:28:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-06 11:28:30,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:30,451 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:30,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-06 11:28:30,451 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1495688920, now seen corresponding path program 135 times [2021-05-06 11:28:30,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:30,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974350439] [2021-05-06 11:28:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:30,454 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:30,455 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:30,455 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:36,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:36,665 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:36,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974350439] [2021-05-06 11:28:36,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [974350439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:36,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-06 11:28:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255037424] [2021-05-06 11:28:36,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-06 11:28:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-06 11:28:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:28:36,667 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 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) [2021-05-06 11:28:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:37,336 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2021-05-06 11:28:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-06 11:28:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 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 282 [2021-05-06 11:28:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:37,338 INFO L225 Difference]: With dead ends: 292 [2021-05-06 11:28:37,338 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 11:28:37,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 6100.2ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:28:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 11:28:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 11:28:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:37,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2021-05-06 11:28:37,341 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2021-05-06 11:28:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:37,341 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2021-05-06 11:28:37,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 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) [2021-05-06 11:28:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2021-05-06 11:28:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 11:28:37,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:37,342 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:37,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-06 11:28:37,342 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 582904650, now seen corresponding path program 136 times [2021-05-06 11:28:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:37,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677847761] [2021-05-06 11:28:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:37,346 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:37,346 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:37,346 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:43,615 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:43,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677847761] [2021-05-06 11:28:43,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [677847761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:43,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:43,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-06 11:28:43,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965452744] [2021-05-06 11:28:43,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-06 11:28:43,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-06 11:28:43,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:28:43,617 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 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) [2021-05-06 11:28:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:44,315 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2021-05-06 11:28:44,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-06 11:28:44,316 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 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 284 [2021-05-06 11:28:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:44,317 INFO L225 Difference]: With dead ends: 294 [2021-05-06 11:28:44,317 INFO L226 Difference]: Without dead ends: 288 [2021-05-06 11:28:44,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 6158.2ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:28:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-06 11:28:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-05-06 11:28:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2021-05-06 11:28:44,320 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2021-05-06 11:28:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:44,320 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2021-05-06 11:28:44,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 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) [2021-05-06 11:28:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2021-05-06 11:28:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-06 11:28:44,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:44,321 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:44,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-06 11:28:44,322 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 951532780, now seen corresponding path program 137 times [2021-05-06 11:28:44,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:44,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216315416] [2021-05-06 11:28:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:44,327 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:44,327 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:44,327 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:50,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:50,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:50,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216315416] [2021-05-06 11:28:50,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216315416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:50,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:50,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-06 11:28:50,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497332539] [2021-05-06 11:28:50,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-06 11:28:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:50,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-06 11:28:50,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:28:50,798 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 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) [2021-05-06 11:28:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:51,536 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2021-05-06 11:28:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-06 11:28:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 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 286 [2021-05-06 11:28:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:51,537 INFO L225 Difference]: With dead ends: 296 [2021-05-06 11:28:51,537 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 11:28:51,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6351.1ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:28:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 11:28:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2021-05-06 11:28:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2021-05-06 11:28:51,540 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2021-05-06 11:28:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:51,540 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2021-05-06 11:28:51,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 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) [2021-05-06 11:28:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2021-05-06 11:28:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-06 11:28:51,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:51,541 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:51,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-06 11:28:51,541 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1279119858, now seen corresponding path program 138 times [2021-05-06 11:28:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:51,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446349818] [2021-05-06 11:28:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:51,545 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:51,545 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:51,545 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:58,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:58,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:58,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446349818] [2021-05-06 11:28:58,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446349818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:58,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:58,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-06 11:28:58,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427810152] [2021-05-06 11:28:58,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-06 11:28:58,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-06 11:28:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:28:58,131 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 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) [2021-05-06 11:28:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:58,732 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2021-05-06 11:28:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-06 11:28:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 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 288 [2021-05-06 11:28:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:58,733 INFO L225 Difference]: With dead ends: 298 [2021-05-06 11:28:58,733 INFO L226 Difference]: Without dead ends: 292 [2021-05-06 11:28:58,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 6467.6ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:28:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-06 11:28:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-06 11:28:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0034965034965035) internal successors, (287), 286 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2021-05-06 11:28:58,737 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2021-05-06 11:28:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:58,737 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2021-05-06 11:28:58,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 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) [2021-05-06 11:28:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2021-05-06 11:28:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-06 11:28:58,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:58,738 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:58,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-06 11:28:58,738 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1747624272, now seen corresponding path program 139 times [2021-05-06 11:28:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:58,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138901684] [2021-05-06 11:28:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:58,741 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:58,741 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:58,742 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:05,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:05,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138901684] [2021-05-06 11:29:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138901684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:05,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:05,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-06 11:29:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131995081] [2021-05-06 11:29:05,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-06 11:29:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-06 11:29:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:29:05,422 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 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) [2021-05-06 11:29:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:05,841 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2021-05-06 11:29:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-06 11:29:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 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 290 [2021-05-06 11:29:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:05,842 INFO L225 Difference]: With dead ends: 300 [2021-05-06 11:29:05,842 INFO L226 Difference]: Without dead ends: 294 [2021-05-06 11:29:05,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 6560.9ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:29:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-06 11:29:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-05-06 11:29:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0034722222222223) internal successors, (289), 288 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2021-05-06 11:29:05,846 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2021-05-06 11:29:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:05,846 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2021-05-06 11:29:05,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 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) [2021-05-06 11:29:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2021-05-06 11:29:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-06 11:29:05,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:05,847 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:05,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-06 11:29:05,847 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1008800046, now seen corresponding path program 140 times [2021-05-06 11:29:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:05,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603651578] [2021-05-06 11:29:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:05,851 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:05,851 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:05,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:12,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:12,494 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:12,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603651578] [2021-05-06 11:29:12,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603651578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:12,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:12,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-06 11:29:12,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459008585] [2021-05-06 11:29:12,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-06 11:29:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:12,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-06 11:29:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:29:12,496 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 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) [2021-05-06 11:29:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:13,151 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2021-05-06 11:29:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-06 11:29:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 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 292 [2021-05-06 11:29:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:13,152 INFO L225 Difference]: With dead ends: 302 [2021-05-06 11:29:13,152 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 11:29:13,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6520.1ms TimeCoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:29:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 11:29:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-05-06 11:29:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0034482758620689) internal successors, (291), 290 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2021-05-06 11:29:13,155 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2021-05-06 11:29:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:13,155 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2021-05-06 11:29:13,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 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) [2021-05-06 11:29:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2021-05-06 11:29:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-06 11:29:13,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:13,156 INFO L523 BasicCegarLoop]: trace histogram [141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:13,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-06 11:29:13,157 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 331677300, now seen corresponding path program 141 times [2021-05-06 11:29:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928979110] [2021-05-06 11:29:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:13,167 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:13,167 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:13,168 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:19,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:19,932 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:19,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928979110] [2021-05-06 11:29:19,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [928979110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:19,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:19,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2021-05-06 11:29:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003683703] [2021-05-06 11:29:19,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2021-05-06 11:29:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-05-06 11:29:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:29:19,934 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 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) [2021-05-06 11:29:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:20,802 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2021-05-06 11:29:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-06 11:29:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 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 294 [2021-05-06 11:29:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:20,803 INFO L225 Difference]: With dead ends: 304 [2021-05-06 11:29:20,803 INFO L226 Difference]: Without dead ends: 298 [2021-05-06 11:29:20,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 6650.2ms TimeCoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:29:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-06 11:29:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2021-05-06 11:29:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0034246575342465) internal successors, (293), 292 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2021-05-06 11:29:20,807 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2021-05-06 11:29:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:20,807 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2021-05-06 11:29:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 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) [2021-05-06 11:29:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2021-05-06 11:29:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-06 11:29:20,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:20,808 INFO L523 BasicCegarLoop]: trace histogram [142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:20,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-06 11:29:20,808 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash 40218006, now seen corresponding path program 142 times [2021-05-06 11:29:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:20,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914449129] [2021-05-06 11:29:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:20,811 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:20,811 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:20,812 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:27,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:27,617 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:27,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914449129] [2021-05-06 11:29:27,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [914449129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:27,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:27,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2021-05-06 11:29:27,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84070974] [2021-05-06 11:29:27,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2021-05-06 11:29:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-05-06 11:29:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:29:27,619 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:28,407 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2021-05-06 11:29:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-06 11:29:28,407 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have 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 [2021-05-06 11:29:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:28,408 INFO L225 Difference]: With dead ends: 306 [2021-05-06 11:29:28,408 INFO L226 Difference]: Without dead ends: 300 [2021-05-06 11:29:28,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6690.1ms TimeCoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:29:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-06 11:29:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-05-06 11:29:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0034013605442176) internal successors, (295), 294 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2021-05-06 11:29:28,411 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2021-05-06 11:29:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:28,412 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2021-05-06 11:29:28,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:28,412 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2021-05-06 11:29:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-06 11:29:28,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:28,413 INFO L523 BasicCegarLoop]: trace histogram [143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:28,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-06 11:29:28,413 INFO L428 AbstractCegarLoop]: === Iteration 145 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -879289288, now seen corresponding path program 143 times [2021-05-06 11:29:28,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:28,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399055967] [2021-05-06 11:29:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:28,416 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:28,416 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:28,417 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:35,362 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:35,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399055967] [2021-05-06 11:29:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [399055967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:35,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2021-05-06 11:29:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123042841] [2021-05-06 11:29:35,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 147 states [2021-05-06 11:29:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-05-06 11:29:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:29:35,365 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:35,804 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2021-05-06 11:29:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-05-06 11:29:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have 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 [2021-05-06 11:29:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:35,805 INFO L225 Difference]: With dead ends: 308 [2021-05-06 11:29:35,805 INFO L226 Difference]: Without dead ends: 302 [2021-05-06 11:29:35,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 6827.8ms TimeCoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:29:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-06 11:29:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2021-05-06 11:29:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0033783783783783) internal successors, (297), 296 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2021-05-06 11:29:35,808 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2021-05-06 11:29:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:35,809 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2021-05-06 11:29:35,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2021-05-06 11:29:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-06 11:29:35,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:35,810 INFO L523 BasicCegarLoop]: trace histogram [144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:35,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-06 11:29:35,810 INFO L428 AbstractCegarLoop]: === Iteration 146 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash 237464154, now seen corresponding path program 144 times [2021-05-06 11:29:35,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:35,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430879269] [2021-05-06 11:29:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:35,813 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:35,813 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:35,814 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:42,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:42,829 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:42,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430879269] [2021-05-06 11:29:42,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430879269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:42,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:42,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2021-05-06 11:29:42,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599886868] [2021-05-06 11:29:42,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-06 11:29:42,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:42,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-06 11:29:42,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:29:42,831 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:43,745 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2021-05-06 11:29:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-06 11:29:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2021-05-06 11:29:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:43,746 INFO L225 Difference]: With dead ends: 310 [2021-05-06 11:29:43,746 INFO L226 Difference]: Without dead ends: 304 [2021-05-06 11:29:43,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 6887.2ms TimeCoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:29:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-06 11:29:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2021-05-06 11:29:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0033557046979866) internal successors, (299), 298 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2021-05-06 11:29:43,749 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2021-05-06 11:29:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:43,750 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2021-05-06 11:29:43,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2021-05-06 11:29:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 11:29:43,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:43,751 INFO L523 BasicCegarLoop]: trace histogram [145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:43,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-06 11:29:43,751 INFO L428 AbstractCegarLoop]: === Iteration 147 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:43,751 INFO L82 PathProgramCache]: Analyzing trace with hash -304302084, now seen corresponding path program 145 times [2021-05-06 11:29:43,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:43,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194407461] [2021-05-06 11:29:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:43,754 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:43,754 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:43,755 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:50,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:50,946 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194407461] [2021-05-06 11:29:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194407461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:50,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:50,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2021-05-06 11:29:50,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804186277] [2021-05-06 11:29:50,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 149 states [2021-05-06 11:29:50,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:50,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-05-06 11:29:50,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:29:50,948 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:51,831 INFO L93 Difference]: Finished difference Result 312 states and 312 transitions. [2021-05-06 11:29:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-05-06 11:29:51,832 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2021-05-06 11:29:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:51,832 INFO L225 Difference]: With dead ends: 312 [2021-05-06 11:29:51,832 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 11:29:51,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 7070.6ms TimeCoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:29:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 11:29:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-05-06 11:29:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0033333333333334) internal successors, (301), 300 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2021-05-06 11:29:51,836 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2021-05-06 11:29:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:51,836 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2021-05-06 11:29:51,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2021-05-06 11:29:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-05-06 11:29:51,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:51,837 INFO L523 BasicCegarLoop]: trace histogram [146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:51,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-06 11:29:51,837 INFO L428 AbstractCegarLoop]: === Iteration 148 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1250613986, now seen corresponding path program 146 times [2021-05-06 11:29:51,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:51,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786851869] [2021-05-06 11:29:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:51,841 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:51,841 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:51,841 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:59,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:59,059 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:59,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786851869] [2021-05-06 11:29:59,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [786851869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:59,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:59,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2021-05-06 11:29:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659237833] [2021-05-06 11:29:59,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states [2021-05-06 11:29:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-05-06 11:29:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:29:59,061 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:59,710 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2021-05-06 11:29:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-06 11:29:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2021-05-06 11:29:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:59,711 INFO L225 Difference]: With dead ends: 314 [2021-05-06 11:29:59,711 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 11:29:59,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7092.0ms TimeCoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:29:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 11:29:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2021-05-06 11:29:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0033112582781456) internal successors, (303), 302 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2021-05-06 11:29:59,715 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2021-05-06 11:29:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:59,715 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2021-05-06 11:29:59,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2021-05-06 11:29:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-05-06 11:29:59,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:59,716 INFO L523 BasicCegarLoop]: trace histogram [147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:59,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-06 11:29:59,716 INFO L428 AbstractCegarLoop]: === Iteration 149 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -123285056, now seen corresponding path program 147 times [2021-05-06 11:29:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:59,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792097158] [2021-05-06 11:29:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:59,720 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:59,720 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:59,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:07,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:07,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:07,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792097158] [2021-05-06 11:30:07,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792097158] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:07,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:07,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2021-05-06 11:30:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292135080] [2021-05-06 11:30:07,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-06 11:30:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-06 11:30:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:30:07,147 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:07,998 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2021-05-06 11:30:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-06 11:30:07,999 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2021-05-06 11:30:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:07,999 INFO L225 Difference]: With dead ends: 316 [2021-05-06 11:30:07,999 INFO L226 Difference]: Without dead ends: 310 [2021-05-06 11:30:08,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 7297.9ms TimeCoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:30:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-06 11:30:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2021-05-06 11:30:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.0032894736842106) internal successors, (305), 304 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2021-05-06 11:30:08,003 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2021-05-06 11:30:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:08,003 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2021-05-06 11:30:08,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2021-05-06 11:30:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-05-06 11:30:08,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:08,004 INFO L523 BasicCegarLoop]: trace histogram [148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:08,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-06 11:30:08,004 INFO L428 AbstractCegarLoop]: === Iteration 150 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash 908058082, now seen corresponding path program 148 times [2021-05-06 11:30:08,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:08,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076215851] [2021-05-06 11:30:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:08,023 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:08,023 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:08,024 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:15,497 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076215851] [2021-05-06 11:30:15,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076215851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:15,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:15,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2021-05-06 11:30:15,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524819709] [2021-05-06 11:30:15,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-06 11:30:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-06 11:30:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:30:15,499 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:16,041 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2021-05-06 11:30:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-05-06 11:30:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2021-05-06 11:30:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:16,042 INFO L225 Difference]: With dead ends: 318 [2021-05-06 11:30:16,042 INFO L226 Difference]: Without dead ends: 312 [2021-05-06 11:30:16,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 7349.1ms TimeCoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:30:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-06 11:30:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2021-05-06 11:30:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0032679738562091) internal successors, (307), 306 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2021-05-06 11:30:16,046 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2021-05-06 11:30:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:16,046 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2021-05-06 11:30:16,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2021-05-06 11:30:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-05-06 11:30:16,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:16,047 INFO L523 BasicCegarLoop]: trace histogram [149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:16,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-06 11:30:16,047 INFO L428 AbstractCegarLoop]: === Iteration 151 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:16,047 INFO L82 PathProgramCache]: Analyzing trace with hash -108631676, now seen corresponding path program 149 times [2021-05-06 11:30:16,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:16,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173355217] [2021-05-06 11:30:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:16,050 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:16,051 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:16,051 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:23,543 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173355217] [2021-05-06 11:30:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [173355217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:23,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:23,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2021-05-06 11:30:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284529929] [2021-05-06 11:30:23,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 153 states [2021-05-06 11:30:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-05-06 11:30:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:30:23,545 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:24,425 INFO L93 Difference]: Finished difference Result 320 states and 320 transitions. [2021-05-06 11:30:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-05-06 11:30:24,425 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2021-05-06 11:30:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:24,426 INFO L225 Difference]: With dead ends: 320 [2021-05-06 11:30:24,426 INFO L226 Difference]: Without dead ends: 314 [2021-05-06 11:30:24,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 7371.4ms TimeCoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:30:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-06 11:30:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2021-05-06 11:30:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0032467532467533) internal successors, (309), 308 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2021-05-06 11:30:24,430 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2021-05-06 11:30:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:24,430 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2021-05-06 11:30:24,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2021-05-06 11:30:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-05-06 11:30:24,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:24,431 INFO L523 BasicCegarLoop]: trace histogram [150, 150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:24,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-06 11:30:24,431 INFO L428 AbstractCegarLoop]: === Iteration 152 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:24,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2105054374, now seen corresponding path program 150 times [2021-05-06 11:30:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:24,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631251984] [2021-05-06 11:30:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:24,434 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:24,435 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:24,435 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:32,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:32,009 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:32,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631251984] [2021-05-06 11:30:32,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631251984] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:32,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:32,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2021-05-06 11:30:32,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982420002] [2021-05-06 11:30:32,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 154 states [2021-05-06 11:30:32,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:32,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-05-06 11:30:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:30:32,011 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:32,724 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2021-05-06 11:30:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-06 11:30:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2021-05-06 11:30:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:32,725 INFO L225 Difference]: With dead ends: 322 [2021-05-06 11:30:32,725 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 11:30:32,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 7452.4ms TimeCoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:30:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 11:30:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-05-06 11:30:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0032258064516129) internal successors, (311), 310 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2021-05-06 11:30:32,729 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2021-05-06 11:30:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:32,729 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2021-05-06 11:30:32,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2021-05-06 11:30:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-05-06 11:30:32,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:32,730 INFO L523 BasicCegarLoop]: trace histogram [151, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:32,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-06 11:30:32,730 INFO L428 AbstractCegarLoop]: === Iteration 153 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:32,730 INFO L82 PathProgramCache]: Analyzing trace with hash -846430392, now seen corresponding path program 151 times [2021-05-06 11:30:32,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709888780] [2021-05-06 11:30:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:32,733 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:32,733 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:32,734 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:40,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:40,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:40,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709888780] [2021-05-06 11:30:40,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709888780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:40,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:40,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2021-05-06 11:30:40,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510077072] [2021-05-06 11:30:40,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 155 states [2021-05-06 11:30:40,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:40,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-05-06 11:30:40,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 11:30:40,417 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:41,219 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2021-05-06 11:30:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-05-06 11:30:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2021-05-06 11:30:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:41,220 INFO L225 Difference]: With dead ends: 324 [2021-05-06 11:30:41,220 INFO L226 Difference]: Without dead ends: 318 [2021-05-06 11:30:41,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 7559.3ms TimeCoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 11:30:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-06 11:30:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2021-05-06 11:30:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.0032051282051282) internal successors, (313), 312 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2021-05-06 11:30:41,224 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2021-05-06 11:30:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:41,224 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2021-05-06 11:30:41,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2021-05-06 11:30:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-06 11:30:41,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:41,225 INFO L523 BasicCegarLoop]: trace histogram [152, 152, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:41,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-06 11:30:41,225 INFO L428 AbstractCegarLoop]: === Iteration 154 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1750092138, now seen corresponding path program 152 times [2021-05-06 11:30:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:41,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254182767] [2021-05-06 11:30:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:41,228 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:41,229 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:41,229 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:49,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:49,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254182767] [2021-05-06 11:30:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [254182767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:49,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:49,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2021-05-06 11:30:49,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693856072] [2021-05-06 11:30:49,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states [2021-05-06 11:30:49,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-05-06 11:30:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 11:30:49,089 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:50,090 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2021-05-06 11:30:50,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-05-06 11:30:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2021-05-06 11:30:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:50,091 INFO L225 Difference]: With dead ends: 326 [2021-05-06 11:30:50,091 INFO L226 Difference]: Without dead ends: 320 [2021-05-06 11:30:50,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 7726.0ms TimeCoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 11:30:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-06 11:30:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2021-05-06 11:30:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0031847133757963) internal successors, (315), 314 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2021-05-06 11:30:50,095 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2021-05-06 11:30:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:50,095 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2021-05-06 11:30:50,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2021-05-06 11:30:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-05-06 11:30:50,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:50,096 INFO L523 BasicCegarLoop]: trace histogram [153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:50,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-06 11:30:50,096 INFO L428 AbstractCegarLoop]: === Iteration 155 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1632244492, now seen corresponding path program 153 times [2021-05-06 11:30:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:50,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387597276] [2021-05-06 11:30:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:50,099 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:50,099 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:50,100 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:58,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:58,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:58,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387597276] [2021-05-06 11:30:58,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [387597276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:58,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:58,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2021-05-06 11:30:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359726418] [2021-05-06 11:30:58,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 157 states [2021-05-06 11:30:58,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-05-06 11:30:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 11:30:58,030 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:58,573 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2021-05-06 11:30:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-05-06 11:30:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2021-05-06 11:30:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:58,574 INFO L225 Difference]: With dead ends: 328 [2021-05-06 11:30:58,574 INFO L226 Difference]: Without dead ends: 322 [2021-05-06 11:30:58,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 7803.3ms TimeCoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 11:30:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-06 11:30:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2021-05-06 11:30:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.0031645569620253) internal successors, (317), 316 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2021-05-06 11:30:58,578 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2021-05-06 11:30:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:58,578 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2021-05-06 11:30:58,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2021-05-06 11:30:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 11:30:58,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:58,579 INFO L523 BasicCegarLoop]: trace histogram [154, 154, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:58,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-05-06 11:30:58,579 INFO L428 AbstractCegarLoop]: === Iteration 156 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash 49806382, now seen corresponding path program 154 times [2021-05-06 11:30:58,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:58,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163597954] [2021-05-06 11:30:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:58,582 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:58,582 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:58,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:06,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:06,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:06,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163597954] [2021-05-06 11:31:06,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [163597954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:06,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:06,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2021-05-06 11:31:06,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536453954] [2021-05-06 11:31:06,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 158 states [2021-05-06 11:31:06,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:06,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-05-06 11:31:06,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 11:31:06,675 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:07,499 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2021-05-06 11:31:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-06 11:31:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2021-05-06 11:31:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:07,500 INFO L225 Difference]: With dead ends: 330 [2021-05-06 11:31:07,500 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 11:31:07,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 7961.7ms TimeCoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 11:31:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 11:31:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 11:31:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0031446540880504) internal successors, (319), 318 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2021-05-06 11:31:07,504 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2021-05-06 11:31:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:07,504 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2021-05-06 11:31:07,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2021-05-06 11:31:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-05-06 11:31:07,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:07,505 INFO L523 BasicCegarLoop]: trace histogram [155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:07,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-06 11:31:07,506 INFO L428 AbstractCegarLoop]: === Iteration 157 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:07,506 INFO L82 PathProgramCache]: Analyzing trace with hash -254794544, now seen corresponding path program 155 times [2021-05-06 11:31:07,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:07,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452360906] [2021-05-06 11:31:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:07,519 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:07,519 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:07,519 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:15,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:15,625 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:15,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452360906] [2021-05-06 11:31:15,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452360906] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:15,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:15,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2021-05-06 11:31:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122633359] [2021-05-06 11:31:15,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-05-06 11:31:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-05-06 11:31:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 11:31:15,628 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:16,701 INFO L93 Difference]: Finished difference Result 332 states and 332 transitions. [2021-05-06 11:31:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-05-06 11:31:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2021-05-06 11:31:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:16,702 INFO L225 Difference]: With dead ends: 332 [2021-05-06 11:31:16,702 INFO L226 Difference]: Without dead ends: 326 [2021-05-06 11:31:16,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 7963.0ms TimeCoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 11:31:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-06 11:31:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2021-05-06 11:31:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.003125) internal successors, (321), 320 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2021-05-06 11:31:16,706 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2021-05-06 11:31:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:16,707 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2021-05-06 11:31:16,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2021-05-06 11:31:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-05-06 11:31:16,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:16,708 INFO L523 BasicCegarLoop]: trace histogram [156, 156, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:16,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-06 11:31:16,708 INFO L428 AbstractCegarLoop]: === Iteration 158 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -918508302, now seen corresponding path program 156 times [2021-05-06 11:31:16,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:16,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741827937] [2021-05-06 11:31:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:16,711 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:16,711 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:16,713 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:24,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:24,938 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741827937] [2021-05-06 11:31:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [741827937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:24,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2021-05-06 11:31:24,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469095309] [2021-05-06 11:31:24,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 160 states [2021-05-06 11:31:24,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-05-06 11:31:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 11:31:24,940 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:25,916 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2021-05-06 11:31:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-06 11:31:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324 [2021-05-06 11:31:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:25,917 INFO L225 Difference]: With dead ends: 334 [2021-05-06 11:31:25,917 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 11:31:25,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 8085.9ms TimeCoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 11:31:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 11:31:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-05-06 11:31:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.0031055900621118) internal successors, (323), 322 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2021-05-06 11:31:25,921 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2021-05-06 11:31:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:25,921 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2021-05-06 11:31:25,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2021-05-06 11:31:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-05-06 11:31:25,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:25,922 INFO L523 BasicCegarLoop]: trace histogram [157, 157, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:25,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-06 11:31:25,922 INFO L428 AbstractCegarLoop]: === Iteration 159 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1202697364, now seen corresponding path program 157 times [2021-05-06 11:31:25,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:25,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830314254] [2021-05-06 11:31:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:25,926 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:25,926 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:25,926 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:34,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:34,260 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830314254] [2021-05-06 11:31:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [830314254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:34,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:34,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2021-05-06 11:31:34,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078605401] [2021-05-06 11:31:34,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-06 11:31:34,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:34,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-06 11:31:34,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 11:31:34,262 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:34,817 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2021-05-06 11:31:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-06 11:31:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2021-05-06 11:31:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:34,818 INFO L225 Difference]: With dead ends: 336 [2021-05-06 11:31:34,818 INFO L226 Difference]: Without dead ends: 330 [2021-05-06 11:31:34,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8195.3ms TimeCoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 11:31:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-06 11:31:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2021-05-06 11:31:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0030864197530864) internal successors, (325), 324 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2021-05-06 11:31:34,822 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2021-05-06 11:31:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2021-05-06 11:31:34,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2021-05-06 11:31:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-05-06 11:31:34,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:34,823 INFO L523 BasicCegarLoop]: trace histogram [158, 158, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:34,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-05-06 11:31:34,823 INFO L428 AbstractCegarLoop]: === Iteration 160 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash -428123210, now seen corresponding path program 158 times [2021-05-06 11:31:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:34,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018620888] [2021-05-06 11:31:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:34,827 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:34,827 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:34,827 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:43,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:43,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:43,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018620888] [2021-05-06 11:31:43,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018620888] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:43,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:43,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2021-05-06 11:31:43,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485770775] [2021-05-06 11:31:43,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 162 states [2021-05-06 11:31:43,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:43,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-05-06 11:31:43,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 11:31:43,219 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:43,849 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2021-05-06 11:31:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-05-06 11:31:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 328 [2021-05-06 11:31:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:43,850 INFO L225 Difference]: With dead ends: 338 [2021-05-06 11:31:43,850 INFO L226 Difference]: Without dead ends: 332 [2021-05-06 11:31:43,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8254.8ms TimeCoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 11:31:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-06 11:31:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2021-05-06 11:31:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2021-05-06 11:31:43,861 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2021-05-06 11:31:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:43,861 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2021-05-06 11:31:43,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2021-05-06 11:31:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-05-06 11:31:43,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:43,863 INFO L523 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:43,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-06 11:31:43,863 INFO L428 AbstractCegarLoop]: === Iteration 161 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash 16368216, now seen corresponding path program 159 times [2021-05-06 11:31:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:43,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329723046] [2021-05-06 11:31:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:43,866 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:43,866 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:43,867 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:52,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:52,537 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:52,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329723046] [2021-05-06 11:31:52,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [329723046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:52,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:52,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2021-05-06 11:31:52,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235823600] [2021-05-06 11:31:52,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 163 states [2021-05-06 11:31:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:52,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-05-06 11:31:52,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 11:31:52,539 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:53,448 INFO L93 Difference]: Finished difference Result 340 states and 340 transitions. [2021-05-06 11:31:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-05-06 11:31:53,448 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2021-05-06 11:31:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:53,449 INFO L225 Difference]: With dead ends: 340 [2021-05-06 11:31:53,449 INFO L226 Difference]: Without dead ends: 334 [2021-05-06 11:31:53,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8538.1ms TimeCoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 11:31:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-06 11:31:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2021-05-06 11:31:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.0030487804878048) internal successors, (329), 328 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2021-05-06 11:31:53,453 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2021-05-06 11:31:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:53,453 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2021-05-06 11:31:53,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2021-05-06 11:31:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-05-06 11:31:53,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:53,454 INFO L523 BasicCegarLoop]: trace histogram [160, 160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:53,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-06 11:31:53,454 INFO L428 AbstractCegarLoop]: === Iteration 162 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1970866298, now seen corresponding path program 160 times [2021-05-06 11:31:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:53,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202913478] [2021-05-06 11:31:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:53,457 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:53,458 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:53,458 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:02,120 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:02,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202913478] [2021-05-06 11:32:02,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202913478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:02,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:02,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2021-05-06 11:32:02,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714204964] [2021-05-06 11:32:02,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 164 states [2021-05-06 11:32:02,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-05-06 11:32:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 11:32:02,122 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:03,230 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2021-05-06 11:32:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-06 11:32:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 332 [2021-05-06 11:32:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:03,231 INFO L225 Difference]: With dead ends: 342 [2021-05-06 11:32:03,231 INFO L226 Difference]: Without dead ends: 336 [2021-05-06 11:32:03,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 8519.5ms TimeCoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 11:32:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-06 11:32:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2021-05-06 11:32:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.003030303030303) internal successors, (331), 330 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2021-05-06 11:32:03,235 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2021-05-06 11:32:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:03,235 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2021-05-06 11:32:03,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2021-05-06 11:32:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-05-06 11:32:03,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:03,236 INFO L523 BasicCegarLoop]: trace histogram [161, 161, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:03,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-05-06 11:32:03,236 INFO L428 AbstractCegarLoop]: === Iteration 163 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -952152548, now seen corresponding path program 161 times [2021-05-06 11:32:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961825393] [2021-05-06 11:32:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:03,239 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:03,240 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:03,240 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:12,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:12,014 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:12,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961825393] [2021-05-06 11:32:12,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1961825393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:12,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:12,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2021-05-06 11:32:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886012341] [2021-05-06 11:32:12,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 165 states [2021-05-06 11:32:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-05-06 11:32:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 11:32:12,016 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:13,136 INFO L93 Difference]: Finished difference Result 344 states and 344 transitions. [2021-05-06 11:32:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-05-06 11:32:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2021-05-06 11:32:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:13,137 INFO L225 Difference]: With dead ends: 344 [2021-05-06 11:32:13,137 INFO L226 Difference]: Without dead ends: 338 [2021-05-06 11:32:13,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8634.0ms TimeCoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 11:32:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-06 11:32:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2021-05-06 11:32:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0030120481927711) internal successors, (333), 332 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2021-05-06 11:32:13,141 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2021-05-06 11:32:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:13,141 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2021-05-06 11:32:13,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:13,141 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2021-05-06 11:32:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-05-06 11:32:13,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:13,142 INFO L523 BasicCegarLoop]: trace histogram [162, 162, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:13,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-06 11:32:13,143 INFO L428 AbstractCegarLoop]: === Iteration 164 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1064651970, now seen corresponding path program 162 times [2021-05-06 11:32:13,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:13,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756440621] [2021-05-06 11:32:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:13,146 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:13,146 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:13,146 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:22,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:22,020 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:22,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756440621] [2021-05-06 11:32:22,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756440621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:22,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:22,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2021-05-06 11:32:22,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844086709] [2021-05-06 11:32:22,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 166 states [2021-05-06 11:32:22,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-05-06 11:32:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 11:32:22,022 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:23,143 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2021-05-06 11:32:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-05-06 11:32:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2021-05-06 11:32:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:23,144 INFO L225 Difference]: With dead ends: 346 [2021-05-06 11:32:23,144 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 11:32:23,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 8739.6ms TimeCoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 11:32:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 11:32:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2021-05-06 11:32:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.0029940119760479) internal successors, (335), 334 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2021-05-06 11:32:23,148 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2021-05-06 11:32:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:23,149 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2021-05-06 11:32:23,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2021-05-06 11:32:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-05-06 11:32:23,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:23,150 INFO L523 BasicCegarLoop]: trace histogram [163, 163, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:23,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-05-06 11:32:23,150 INFO L428 AbstractCegarLoop]: === Iteration 165 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1802414112, now seen corresponding path program 163 times [2021-05-06 11:32:23,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:23,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297054566] [2021-05-06 11:32:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:23,159 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:23,159 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:23,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:32,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:32,033 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:32,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297054566] [2021-05-06 11:32:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1297054566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:32,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:32,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2021-05-06 11:32:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525017628] [2021-05-06 11:32:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 167 states [2021-05-06 11:32:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-05-06 11:32:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 11:32:32,036 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:33,198 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2021-05-06 11:32:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-05-06 11:32:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2021-05-06 11:32:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:33,199 INFO L225 Difference]: With dead ends: 348 [2021-05-06 11:32:33,199 INFO L226 Difference]: Without dead ends: 342 [2021-05-06 11:32:33,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 8738.9ms TimeCoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 11:32:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-06 11:32:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2021-05-06 11:32:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.0029761904761905) internal successors, (337), 336 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2021-05-06 11:32:33,203 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2021-05-06 11:32:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:33,204 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2021-05-06 11:32:33,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2021-05-06 11:32:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-05-06 11:32:33,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:33,205 INFO L523 BasicCegarLoop]: trace histogram [164, 164, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:33,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-05-06 11:32:33,205 INFO L428 AbstractCegarLoop]: === Iteration 166 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2122228734, now seen corresponding path program 164 times [2021-05-06 11:32:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473587142] [2021-05-06 11:32:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:33,208 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:33,208 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:33,209 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:42,240 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:42,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473587142] [2021-05-06 11:32:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473587142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:42,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:42,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2021-05-06 11:32:42,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18882803] [2021-05-06 11:32:42,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 168 states [2021-05-06 11:32:42,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-05-06 11:32:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 11:32:42,243 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:43,413 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2021-05-06 11:32:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-05-06 11:32:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2021-05-06 11:32:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:43,414 INFO L225 Difference]: With dead ends: 350 [2021-05-06 11:32:43,414 INFO L226 Difference]: Without dead ends: 344 [2021-05-06 11:32:43,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 8895.3ms TimeCoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 11:32:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-06 11:32:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2021-05-06 11:32:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.0029585798816567) internal successors, (339), 338 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2021-05-06 11:32:43,418 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2021-05-06 11:32:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:43,418 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2021-05-06 11:32:43,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2021-05-06 11:32:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-05-06 11:32:43,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:43,419 INFO L523 BasicCegarLoop]: trace histogram [165, 165, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:43,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-06 11:32:43,420 INFO L428 AbstractCegarLoop]: === Iteration 167 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -226435164, now seen corresponding path program 165 times [2021-05-06 11:32:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117509472] [2021-05-06 11:32:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:43,423 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:43,423 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:43,423 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:52,709 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:52,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117509472] [2021-05-06 11:32:52,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117509472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:52,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:52,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2021-05-06 11:32:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220742409] [2021-05-06 11:32:52,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 169 states [2021-05-06 11:32:52,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:52,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-05-06 11:32:52,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 11:32:52,711 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:53,746 INFO L93 Difference]: Finished difference Result 352 states and 352 transitions. [2021-05-06 11:32:53,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-05-06 11:32:53,747 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2021-05-06 11:32:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:53,748 INFO L225 Difference]: With dead ends: 352 [2021-05-06 11:32:53,748 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 11:32:53,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 9144.8ms TimeCoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 11:32:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 11:32:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2021-05-06 11:32:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.0029411764705882) internal successors, (341), 340 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2021-05-06 11:32:53,752 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2021-05-06 11:32:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:53,752 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2021-05-06 11:32:53,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2021-05-06 11:32:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-05-06 11:32:53,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:53,753 INFO L523 BasicCegarLoop]: trace histogram [166, 166, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:53,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-05-06 11:32:53,753 INFO L428 AbstractCegarLoop]: === Iteration 168 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 565052102, now seen corresponding path program 166 times [2021-05-06 11:32:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:53,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935022888] [2021-05-06 11:32:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:53,756 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:53,757 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:53,757 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:03,147 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:03,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935022888] [2021-05-06 11:33:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935022888] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:03,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:03,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2021-05-06 11:33:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693240657] [2021-05-06 11:33:03,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 170 states [2021-05-06 11:33:03,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-05-06 11:33:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2021-05-06 11:33:03,150 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:03,930 INFO L93 Difference]: Finished difference Result 354 states and 354 transitions. [2021-05-06 11:33:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-05-06 11:33:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 344 [2021-05-06 11:33:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:03,931 INFO L225 Difference]: With dead ends: 354 [2021-05-06 11:33:03,931 INFO L226 Difference]: Without dead ends: 348 [2021-05-06 11:33:03,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 9246.7ms TimeCoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2021-05-06 11:33:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-06 11:33:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2021-05-06 11:33:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.0029239766081872) internal successors, (343), 342 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2021-05-06 11:33:03,935 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2021-05-06 11:33:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2021-05-06 11:33:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2021-05-06 11:33:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-05-06 11:33:03,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:03,936 INFO L523 BasicCegarLoop]: trace histogram [167, 167, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:03,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-06 11:33:03,937 INFO L428 AbstractCegarLoop]: === Iteration 169 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 975103336, now seen corresponding path program 167 times [2021-05-06 11:33:03,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:03,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068772966] [2021-05-06 11:33:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:03,940 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:03,940 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:03,940 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:13,351 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:13,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068772966] [2021-05-06 11:33:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068772966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:13,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2021-05-06 11:33:13,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469899292] [2021-05-06 11:33:13,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 171 states [2021-05-06 11:33:13,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-05-06 11:33:13,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 11:33:13,354 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:13,940 INFO L93 Difference]: Finished difference Result 356 states and 356 transitions. [2021-05-06 11:33:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-05-06 11:33:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2021-05-06 11:33:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:13,941 INFO L225 Difference]: With dead ends: 356 [2021-05-06 11:33:13,941 INFO L226 Difference]: Without dead ends: 350 [2021-05-06 11:33:13,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 9267.3ms TimeCoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 11:33:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-06 11:33:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2021-05-06 11:33:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.002906976744186) internal successors, (345), 344 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2021-05-06 11:33:13,945 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 346 [2021-05-06 11:33:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:13,946 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2021-05-06 11:33:13,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2021-05-06 11:33:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-05-06 11:33:13,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:13,947 INFO L523 BasicCegarLoop]: trace histogram [168, 168, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:13,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-06 11:33:13,947 INFO L428 AbstractCegarLoop]: === Iteration 170 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash -102652022, now seen corresponding path program 168 times [2021-05-06 11:33:13,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:13,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575870867] [2021-05-06 11:33:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:13,950 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:13,950 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:13,951 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:23,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:23,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575870867] [2021-05-06 11:33:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [575870867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2021-05-06 11:33:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473957400] [2021-05-06 11:33:23,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 172 states [2021-05-06 11:33:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2021-05-06 11:33:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2021-05-06 11:33:23,489 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:24,449 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2021-05-06 11:33:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-05-06 11:33:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 348 [2021-05-06 11:33:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:24,451 INFO L225 Difference]: With dead ends: 358 [2021-05-06 11:33:24,451 INFO L226 Difference]: Without dead ends: 352 [2021-05-06 11:33:24,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 9389.6ms TimeCoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2021-05-06 11:33:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-06 11:33:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2021-05-06 11:33:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0028901734104045) internal successors, (347), 346 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2021-05-06 11:33:24,455 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 348 [2021-05-06 11:33:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:24,455 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2021-05-06 11:33:24,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2021-05-06 11:33:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-05-06 11:33:24,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:24,456 INFO L523 BasicCegarLoop]: trace histogram [169, 169, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:24,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-05-06 11:33:24,456 INFO L428 AbstractCegarLoop]: === Iteration 171 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash -738432724, now seen corresponding path program 169 times [2021-05-06 11:33:24,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:24,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014806129] [2021-05-06 11:33:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:24,460 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:24,460 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:24,460 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:34,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:34,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014806129] [2021-05-06 11:33:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014806129] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:34,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:34,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2021-05-06 11:33:34,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397523815] [2021-05-06 11:33:34,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 173 states [2021-05-06 11:33:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-05-06 11:33:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 11:33:34,048 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:35,671 INFO L93 Difference]: Finished difference Result 360 states and 360 transitions. [2021-05-06 11:33:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-05-06 11:33:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2021-05-06 11:33:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:35,672 INFO L225 Difference]: With dead ends: 360 [2021-05-06 11:33:35,672 INFO L226 Difference]: Without dead ends: 354 [2021-05-06 11:33:35,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 9437.5ms TimeCoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 11:33:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-06 11:33:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2021-05-06 11:33:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.0028735632183907) internal successors, (349), 348 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2021-05-06 11:33:35,677 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 350 [2021-05-06 11:33:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:35,677 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2021-05-06 11:33:35,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2021-05-06 11:33:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-05-06 11:33:35,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:35,678 INFO L523 BasicCegarLoop]: trace histogram [170, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:35,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-06 11:33:35,678 INFO L428 AbstractCegarLoop]: === Iteration 172 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1838331314, now seen corresponding path program 170 times [2021-05-06 11:33:35,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:35,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56190478] [2021-05-06 11:33:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:35,681 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:35,681 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:35,682 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:45,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:45,418 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:45,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56190478] [2021-05-06 11:33:45,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [56190478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:45,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:45,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2021-05-06 11:33:45,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887795584] [2021-05-06 11:33:45,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 174 states [2021-05-06 11:33:45,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-05-06 11:33:45,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2021-05-06 11:33:45,421 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:46,747 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2021-05-06 11:33:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-05-06 11:33:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 352 [2021-05-06 11:33:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:46,749 INFO L225 Difference]: With dead ends: 362 [2021-05-06 11:33:46,749 INFO L226 Difference]: Without dead ends: 356 [2021-05-06 11:33:46,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 9588.3ms TimeCoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2021-05-06 11:33:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-06 11:33:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2021-05-06 11:33:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.002857142857143) internal successors, (351), 350 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2021-05-06 11:33:46,753 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 352 [2021-05-06 11:33:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:46,753 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2021-05-06 11:33:46,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2021-05-06 11:33:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-05-06 11:33:46,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:46,754 INFO L523 BasicCegarLoop]: trace histogram [171, 171, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:46,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-06 11:33:46,754 INFO L428 AbstractCegarLoop]: === Iteration 173 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2016045808, now seen corresponding path program 171 times [2021-05-06 11:33:46,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:46,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950482468] [2021-05-06 11:33:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:46,758 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:46,758 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:46,758 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:56,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:56,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950482468] [2021-05-06 11:33:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [950482468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:56,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:56,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [175] imperfect sequences [] total 175 [2021-05-06 11:33:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922171033] [2021-05-06 11:33:56,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 175 states [2021-05-06 11:33:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:56,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-05-06 11:33:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15053, Invalid=15397, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 11:33:56,540 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:57,162 INFO L93 Difference]: Finished difference Result 364 states and 364 transitions. [2021-05-06 11:33:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-05-06 11:33:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2021-05-06 11:33:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:57,163 INFO L225 Difference]: With dead ends: 364 [2021-05-06 11:33:57,163 INFO L226 Difference]: Without dead ends: 358 [2021-05-06 11:33:57,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9629.3ms TimeCoverageRelationStatistics Valid=15053, Invalid=15397, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 11:33:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-06 11:33:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2021-05-06 11:33:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.0028409090909092) internal successors, (353), 352 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2021-05-06 11:33:57,167 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 354 [2021-05-06 11:33:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2021-05-06 11:33:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2021-05-06 11:33:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-05-06 11:33:57,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:57,169 INFO L523 BasicCegarLoop]: trace histogram [172, 172, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:57,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-06 11:33:57,169 INFO L428 AbstractCegarLoop]: === Iteration 174 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -484316398, now seen corresponding path program 172 times [2021-05-06 11:33:57,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:57,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203607351] [2021-05-06 11:33:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:57,175 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:57,175 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:57,175 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:07,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:07,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203607351] [2021-05-06 11:34:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [203607351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:07,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:07,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2021-05-06 11:34:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280519490] [2021-05-06 11:34:07,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 176 states [2021-05-06 11:34:07,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-05-06 11:34:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2021-05-06 11:34:07,141 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:08,515 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2021-05-06 11:34:08,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-05-06 11:34:08,515 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2021-05-06 11:34:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:08,516 INFO L225 Difference]: With dead ends: 366 [2021-05-06 11:34:08,516 INFO L226 Difference]: Without dead ends: 360 [2021-05-06 11:34:08,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 9812.1ms TimeCoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2021-05-06 11:34:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-06 11:34:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 359. [2021-05-06 11:34:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.002824858757062) internal successors, (355), 354 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2021-05-06 11:34:08,520 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 356 [2021-05-06 11:34:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:08,521 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2021-05-06 11:34:08,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2021-05-06 11:34:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-05-06 11:34:08,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:08,522 INFO L523 BasicCegarLoop]: trace histogram [173, 173, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:08,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-06 11:34:08,522 INFO L428 AbstractCegarLoop]: === Iteration 175 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1849289396, now seen corresponding path program 173 times [2021-05-06 11:34:08,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:08,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374387293] [2021-05-06 11:34:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:08,525 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:08,525 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:08,526 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:18,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:18,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:18,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374387293] [2021-05-06 11:34:18,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1374387293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:18,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:18,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2021-05-06 11:34:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092489277] [2021-05-06 11:34:18,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 177 states [2021-05-06 11:34:18,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:18,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2021-05-06 11:34:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15402, Invalid=15750, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 11:34:18,573 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:19,913 INFO L93 Difference]: Finished difference Result 368 states and 368 transitions. [2021-05-06 11:34:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-05-06 11:34:19,913 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2021-05-06 11:34:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:19,914 INFO L225 Difference]: With dead ends: 368 [2021-05-06 11:34:19,914 INFO L226 Difference]: Without dead ends: 362 [2021-05-06 11:34:19,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 9894.5ms TimeCoverageRelationStatistics Valid=15402, Invalid=15750, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 11:34:19,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-06 11:34:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2021-05-06 11:34:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.002808988764045) internal successors, (357), 356 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2021-05-06 11:34:19,918 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 358 [2021-05-06 11:34:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:19,918 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2021-05-06 11:34:19,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2021-05-06 11:34:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-05-06 11:34:19,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:19,920 INFO L523 BasicCegarLoop]: trace histogram [174, 174, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:19,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-06 11:34:19,920 INFO L428 AbstractCegarLoop]: === Iteration 176 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1823438378, now seen corresponding path program 174 times [2021-05-06 11:34:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:19,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664144240] [2021-05-06 11:34:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:19,923 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:19,923 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:19,923 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:30,034 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:30,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664144240] [2021-05-06 11:34:30,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664144240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:30,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:30,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [178] imperfect sequences [] total 178 [2021-05-06 11:34:30,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139300302] [2021-05-06 11:34:30,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 178 states [2021-05-06 11:34:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-05-06 11:34:30,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2021-05-06 11:34:30,037 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:30,745 INFO L93 Difference]: Finished difference Result 370 states and 370 transitions. [2021-05-06 11:34:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-05-06 11:34:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2021-05-06 11:34:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:30,746 INFO L225 Difference]: With dead ends: 370 [2021-05-06 11:34:30,746 INFO L226 Difference]: Without dead ends: 364 [2021-05-06 11:34:30,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 9960.9ms TimeCoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2021-05-06 11:34:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-06 11:34:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 363. [2021-05-06 11:34:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.0027932960893855) internal successors, (359), 358 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2021-05-06 11:34:30,750 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 360 [2021-05-06 11:34:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:30,751 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2021-05-06 11:34:30,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2021-05-06 11:34:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-05-06 11:34:30,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:30,752 INFO L523 BasicCegarLoop]: trace histogram [175, 175, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:30,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-05-06 11:34:30,752 INFO L428 AbstractCegarLoop]: === Iteration 177 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash -851711880, now seen corresponding path program 175 times [2021-05-06 11:34:30,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:30,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599045505] [2021-05-06 11:34:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:30,755 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:30,755 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:30,756 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:41,075 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:41,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599045505] [2021-05-06 11:34:41,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [599045505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:41,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:41,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2021-05-06 11:34:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068564975] [2021-05-06 11:34:41,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-05-06 11:34:41,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-05-06 11:34:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15755, Invalid=16107, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 11:34:41,077 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:42,644 INFO L93 Difference]: Finished difference Result 372 states and 372 transitions. [2021-05-06 11:34:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-05-06 11:34:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2021-05-06 11:34:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:42,645 INFO L225 Difference]: With dead ends: 372 [2021-05-06 11:34:42,645 INFO L226 Difference]: Without dead ends: 366 [2021-05-06 11:34:42,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 10168.7ms TimeCoverageRelationStatistics Valid=15755, Invalid=16107, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 11:34:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-06 11:34:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2021-05-06 11:34:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.0027777777777778) internal successors, (361), 360 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2021-05-06 11:34:42,650 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 362 [2021-05-06 11:34:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:42,650 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2021-05-06 11:34:42,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2021-05-06 11:34:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-05-06 11:34:42,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:42,651 INFO L523 BasicCegarLoop]: trace histogram [176, 176, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:42,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-05-06 11:34:42,651 INFO L428 AbstractCegarLoop]: === Iteration 178 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 969549466, now seen corresponding path program 176 times [2021-05-06 11:34:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:42,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259470824] [2021-05-06 11:34:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:42,654 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:42,654 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:42,655 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat