/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:15:57,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:15:57,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:15:57,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:15:57,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:15:57,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:15:57,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:15:57,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:15:57,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:15:57,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:15:57,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:15:57,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:15:57,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:15:57,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:15:57,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:15:57,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:15:57,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:15:57,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:15:57,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:15:57,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:15:57,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:15:57,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:15:57,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:15:57,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:15:57,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:57,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:15:57,711 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:15:58,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:15:58,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:15:58,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:15:58,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:15:58,053 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:15:58,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2021-05-02 23:15:58,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce94712/7d6f92a1aa5e4ca9bb792a45971cd62e/FLAGebfe2395a [2021-05-02 23:15:58,514 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:15:58,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2021-05-02 23:15:58,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce94712/7d6f92a1aa5e4ca9bb792a45971cd62e/FLAGebfe2395a [2021-05-02 23:15:58,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21ce94712/7d6f92a1aa5e4ca9bb792a45971cd62e [2021-05-02 23:15:58,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:15:58,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:15:58,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:58,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:15:58,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:15:58,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c75626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58, skipping insertion in model container [2021-05-02 23:15:58,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:15:58,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:15:58,680 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2021-05-02 23:15:58,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:58,717 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:15:58,750 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2021-05-02 23:15:58,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:15:58,793 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:15:58,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58 WrapperNode [2021-05-02 23:15:58,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:15:58,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:15:58,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:15:58,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:15:58,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... [2021-05-02 23:15:58,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:15:58,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:15:58,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:15:58,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:15:58,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:15:58,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:15:58,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:15:58,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:15:58,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:15:58,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:15:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:15:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:15:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:15:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:15:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:15:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:15:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:15:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:15:58,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:15:59,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:15:59,192 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-02 23:15:59,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:59 BoogieIcfgContainer [2021-05-02 23:15:59,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:15:59,194 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:15:59,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:15:59,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:15:59,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:15:58" (1/3) ... [2021-05-02 23:15:59,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efb3847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:59, skipping insertion in model container [2021-05-02 23:15:59,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:15:58" (2/3) ... [2021-05-02 23:15:59,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6efb3847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:15:59, skipping insertion in model container [2021-05-02 23:15:59,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:15:59" (3/3) ... [2021-05-02 23:15:59,198 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2021-05-02 23:15:59,201 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:15:59,204 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:15:59,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:15:59,235 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:15:59,235 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:15:59,235 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:15:59,235 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:15:59,235 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:15:59,235 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:15:59,235 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:15:59,235 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:15:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:15:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:15:59,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,251 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:59,252 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2021-05-02 23:15:59,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527364574] [2021-05-02 23:15:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,313 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527364574] [2021-05-02 23:15:59,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527364574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:15:59,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428564023] [2021-05-02 23:15:59,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:15:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:15:59,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:59,493 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,565 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2021-05-02 23:15:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:15:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:15:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,571 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:15:59,572 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:15:59,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:15:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:15:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:15:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-02 23:15:59,596 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-05-02 23:15:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,597 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-02 23:15:59,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-02 23:15:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:15:59,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,598 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:59,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:15:59,598 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2021-05-02 23:15:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531589156] [2021-05-02 23:15:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,676 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531589156] [2021-05-02 23:15:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531589156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:15:59,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782065310] [2021-05-02 23:15:59,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:15:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:15:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:59,678 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:15:59,753 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2021-05-02 23:15:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:15:59,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:15:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:15:59,755 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:15:59,755 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:15:59,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:15:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:15:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-05-02 23:15:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2021-05-02 23:15:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-05-02 23:15:59,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-05-02 23:15:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:15:59,761 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-05-02 23:15:59,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:15:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-05-02 23:15:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:15:59,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:15:59,762 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:15:59,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:15:59,762 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:15:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:15:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2021-05-02 23:15:59,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:15:59,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661899867] [2021-05-02 23:15:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:15:59,775 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:15:59,777 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:15:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:15:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:15:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:15:59,893 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:15:59,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661899867] [2021-05-02 23:15:59,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661899867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:15:59,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:15:59,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:15:59,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104628555] [2021-05-02 23:15:59,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:15:59,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:15:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:15:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:15:59,895 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,018 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2021-05-02 23:16:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:00,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:16:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,022 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:16:00,022 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:16:00,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:16:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2021-05-02 23:16:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) [2021-05-02 23:16:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-05-02 23:16:00,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2021-05-02 23:16:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,037 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-05-02 23:16:00,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-05-02 23:16:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:16:00,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,038 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:00,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:00,038 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2021-05-02 23:16:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482716343] [2021-05-02 23:16:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,048 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,052 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,187 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482716343] [2021-05-02 23:16:00,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [482716343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112886916] [2021-05-02 23:16:00,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:00,190 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,317 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2021-05-02 23:16:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:16:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,320 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:16:00,320 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:16:00,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:16:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2021-05-02 23:16:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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) [2021-05-02 23:16:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 23:16:00,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2021-05-02 23:16:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,329 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 23:16:00,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 23:16:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:16:00,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,331 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:00,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:00,331 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2021-05-02 23:16:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029817219] [2021-05-02 23:16:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,337 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,443 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029817219] [2021-05-02 23:16:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029817219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485642757] [2021-05-02 23:16:00,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:00,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:00,445 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,590 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2021-05-02 23:16:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:16:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,591 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:00,591 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:16:00,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:16:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2021-05-02 23:16:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-05-02 23:16:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-02 23:16:00,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2021-05-02 23:16:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,596 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-02 23:16:00,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-02 23:16:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:16:00,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,596 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:00,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:00,597 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2021-05-02 23:16:00,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86898932] [2021-05-02 23:16:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,601 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,602 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:00,692 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:00,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86898932] [2021-05-02 23:16:00,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [86898932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:00,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:00,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154292162] [2021-05-02 23:16:00,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:00,694 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:00,892 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2021-05-02 23:16:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:16:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:00,894 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:16:00,894 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:16:00,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:16:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2021-05-02 23:16:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2021-05-02 23:16:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-05-02 23:16:00,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2021-05-02 23:16:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:00,906 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-05-02 23:16:00,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-05-02 23:16:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:16:00,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:00,907 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:00,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:00,907 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2021-05-02 23:16:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:00,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190341578] [2021-05-02 23:16:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:00,913 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:00,914 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:01,031 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190341578] [2021-05-02 23:16:01,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1190341578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:01,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:01,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:01,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511861696] [2021-05-02 23:16:01,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:01,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:01,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:01,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:01,032 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:01,288 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2021-05-02 23:16:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:16:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:01,290 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:16:01,290 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:16:01,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:16:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2021-05-02 23:16:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 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) [2021-05-02 23:16:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-05-02 23:16:01,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2021-05-02 23:16:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:01,305 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-05-02 23:16:01,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-05-02 23:16:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:16:01,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:01,311 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:01,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:01,311 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2021-05-02 23:16:01,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:01,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123388012] [2021-05-02 23:16:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:01,317 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:01,318 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:01,447 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:01,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123388012] [2021-05-02 23:16:01,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [123388012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:01,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:01,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:01,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969755333] [2021-05-02 23:16:01,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:01,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:01,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:01,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:01,448 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:01,743 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2021-05-02 23:16:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:16:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:01,744 INFO L225 Difference]: With dead ends: 155 [2021-05-02 23:16:01,745 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:16:01,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:16:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-05-02 23:16:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2021-05-02 23:16:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 23:16:01,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2021-05-02 23:16:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:01,749 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 23:16:01,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 23:16:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:16:01,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:01,750 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:01,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:01,751 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2021-05-02 23:16:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:01,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180070277] [2021-05-02 23:16:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:01,756 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:01,757 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:01,867 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:01,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180070277] [2021-05-02 23:16:01,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1180070277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:01,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:01,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:01,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831613847] [2021-05-02 23:16:01,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:01,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:01,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:01,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:01,869 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:02,299 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2021-05-02 23:16:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:16:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:02,301 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:16:02,301 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 23:16:02,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 23:16:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2021-05-02 23:16:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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) [2021-05-02 23:16:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-05-02 23:16:02,308 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2021-05-02 23:16:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:02,308 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-05-02 23:16:02,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-05-02 23:16:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:16:02,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:02,309 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:02,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:02,310 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2021-05-02 23:16:02,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160368082] [2021-05-02 23:16:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:02,314 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:02,316 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:02,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:02,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160368082] [2021-05-02 23:16:02,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160368082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:02,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:02,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138440307] [2021-05-02 23:16:02,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:02,464 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:02,906 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2021-05-02 23:16:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-02 23:16:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:02,907 INFO L225 Difference]: With dead ends: 185 [2021-05-02 23:16:02,907 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:16:02,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:16:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2021-05-02 23:16:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2021-05-02 23:16:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 23:16:02,913 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-02 23:16:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:02,914 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 23:16:02,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 23:16:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 23:16:02,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:02,915 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:02,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:02,915 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2021-05-02 23:16:02,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:02,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678737710] [2021-05-02 23:16:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:02,921 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:02,922 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:03,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678737710] [2021-05-02 23:16:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678737710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:03,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:03,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:03,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774396880] [2021-05-02 23:16:03,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:03,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:03,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:03,067 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:03,666 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2021-05-02 23:16:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-02 23:16:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:03,667 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:16:03,667 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:16:03,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:16:03,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2021-05-02 23:16:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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) [2021-05-02 23:16:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 23:16:03,671 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2021-05-02 23:16:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:03,672 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 23:16:03,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 23:16:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:16:03,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:03,672 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:03,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:03,673 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2021-05-02 23:16:03,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:03,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981366212] [2021-05-02 23:16:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:03,677 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:03,678 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:03,829 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:03,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981366212] [2021-05-02 23:16:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [981366212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:03,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:03,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:03,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306604517] [2021-05-02 23:16:03,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:03,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:03,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:03,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:03,830 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:03,925 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2021-05-02 23:16:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 23:16:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:03,927 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:16:03,927 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:16:03,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:16:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2021-05-02 23:16:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 23:16:03,931 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2021-05-02 23:16:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:03,931 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 23:16:03,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 23:16:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:16:03,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:03,932 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:03,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:03,932 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2021-05-02 23:16:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:03,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596512352] [2021-05-02 23:16:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:03,954 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:03,955 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:04,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596512352] [2021-05-02 23:16:04,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596512352] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:04,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968599686] [2021-05-02 23:16:04,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:04,052 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,119 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2021-05-02 23:16:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 23:16:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,120 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:16:04,121 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:16:04,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:16:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-05-02 23:16:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2021-05-02 23:16:04,127 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2021-05-02 23:16:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,127 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2021-05-02 23:16:04,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2021-05-02 23:16:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:16:04,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,128 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:04,128 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2021-05-02 23:16:04,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174002481] [2021-05-02 23:16:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,133 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,134 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:04,217 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174002481] [2021-05-02 23:16:04,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [174002481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143394311] [2021-05-02 23:16:04,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:04,219 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,276 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2021-05-02 23:16:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 48 [2021-05-02 23:16:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,278 INFO L225 Difference]: With dead ends: 141 [2021-05-02 23:16:04,278 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:16:04,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:16:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 23:16:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2021-05-02 23:16:04,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2021-05-02 23:16:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,288 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2021-05-02 23:16:04,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2021-05-02 23:16:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:16:04,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,291 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:04,291 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2021-05-02 23:16:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924832747] [2021-05-02 23:16:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,296 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:04,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924832747] [2021-05-02 23:16:04,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924832747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:04,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546950089] [2021-05-02 23:16:04,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:04,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:04,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:04,394 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,475 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2021-05-02 23:16:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:16:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,476 INFO L225 Difference]: With dead ends: 165 [2021-05-02 23:16:04,476 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 23:16:04,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 23:16:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-05-02 23:16:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2021-05-02 23:16:04,485 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2021-05-02 23:16:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,486 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2021-05-02 23:16:04,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2021-05-02 23:16:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:04,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,486 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:04,487 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2021-05-02 23:16:04,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455281241] [2021-05-02 23:16:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,492 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,493 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:04,606 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455281241] [2021-05-02 23:16:04,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [455281241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:04,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095753954] [2021-05-02 23:16:04,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:04,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:04,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:04,607 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,701 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 23:16:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 54 [2021-05-02 23:16:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,703 INFO L225 Difference]: With dead ends: 189 [2021-05-02 23:16:04,703 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 23:16:04,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 23:16:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2021-05-02 23:16:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2021-05-02 23:16:04,707 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2021-05-02 23:16:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,707 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2021-05-02 23:16:04,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2021-05-02 23:16:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:16:04,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,708 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:04,708 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2021-05-02 23:16:04,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692936600] [2021-05-02 23:16:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,712 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,713 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:04,809 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:04,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692936600] [2021-05-02 23:16:04,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [692936600] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:04,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:04,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120781839] [2021-05-02 23:16:04,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:04,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:04,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:04,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:04,810 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:04,954 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2021-05-02 23:16:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:16:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:04,955 INFO L225 Difference]: With dead ends: 213 [2021-05-02 23:16:04,955 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 23:16:04,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 23:16:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2021-05-02 23:16:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2021-05-02 23:16:04,966 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2021-05-02 23:16:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:04,966 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2021-05-02 23:16:04,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2021-05-02 23:16:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:04,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:04,967 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:04,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:04,967 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2021-05-02 23:16:04,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:04,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105962522] [2021-05-02 23:16:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:04,975 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:04,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:05,095 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105962522] [2021-05-02 23:16:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [105962522] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:05,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:05,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006589623] [2021-05-02 23:16:05,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:05,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:05,097 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:05,256 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2021-05-02 23:16:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 60 [2021-05-02 23:16:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:05,258 INFO L225 Difference]: With dead ends: 237 [2021-05-02 23:16:05,258 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:16:05,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:16:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2021-05-02 23:16:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2021-05-02 23:16:05,280 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2021-05-02 23:16:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:05,280 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2021-05-02 23:16:05,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2021-05-02 23:16:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:16:05,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:05,281 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:05,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:05,281 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2021-05-02 23:16:05,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:05,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037359633] [2021-05-02 23:16:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:05,286 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:05,287 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:05,396 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:05,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037359633] [2021-05-02 23:16:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037359633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:05,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073644486] [2021-05-02 23:16:05,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:05,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:05,397 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:05,587 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2021-05-02 23:16:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-02 23:16:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:05,589 INFO L225 Difference]: With dead ends: 261 [2021-05-02 23:16:05,589 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:16:05,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:16:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2021-05-02 23:16:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2021-05-02 23:16:05,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2021-05-02 23:16:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:05,597 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2021-05-02 23:16:05,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2021-05-02 23:16:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:05,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:05,598 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:05,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:05,598 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2021-05-02 23:16:05,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:05,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821580828] [2021-05-02 23:16:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:05,603 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:05,603 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:05,670 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821580828] [2021-05-02 23:16:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [821580828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:05,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:05,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077011875] [2021-05-02 23:16:05,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:05,671 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:05,725 INFO L93 Difference]: Finished difference Result 327 states and 426 transitions. [2021-05-02 23:16:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 23:16:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:05,730 INFO L225 Difference]: With dead ends: 327 [2021-05-02 23:16:05,730 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 23:16:05,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 23:16:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2021-05-02 23:16:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 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) [2021-05-02 23:16:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2021-05-02 23:16:05,739 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2021-05-02 23:16:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:05,739 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2021-05-02 23:16:05,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2021-05-02 23:16:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:16:05,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:05,740 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:05,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:05,740 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2021-05-02 23:16:05,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:05,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230599029] [2021-05-02 23:16:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:05,744 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:05,745 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:05,881 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230599029] [2021-05-02 23:16:05,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230599029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:05,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:05,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:05,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362595163] [2021-05-02 23:16:05,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:05,882 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:06,134 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2021-05-02 23:16:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-02 23:16:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:06,136 INFO L225 Difference]: With dead ends: 244 [2021-05-02 23:16:06,136 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:16:06,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:16:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-05-02 23:16:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 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) [2021-05-02 23:16:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2021-05-02 23:16:06,143 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2021-05-02 23:16:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:06,144 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2021-05-02 23:16:06,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2021-05-02 23:16:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:16:06,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:06,144 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:06,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:06,145 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2021-05-02 23:16:06,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:06,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519365394] [2021-05-02 23:16:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:06,149 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:06,150 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:06,342 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:06,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519365394] [2021-05-02 23:16:06,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [519365394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:06,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:06,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:06,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241573717] [2021-05-02 23:16:06,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:06,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:06,343 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:06,453 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2021-05-02 23:16:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 23:16:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:06,455 INFO L225 Difference]: With dead ends: 341 [2021-05-02 23:16:06,456 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 23:16:06,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 23:16:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 160. [2021-05-02 23:16:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 155 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) [2021-05-02 23:16:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 203 transitions. [2021-05-02 23:16:06,478 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 203 transitions. Word has length 68 [2021-05-02 23:16:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:06,478 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 203 transitions. [2021-05-02 23:16:06,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 203 transitions. [2021-05-02 23:16:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:06,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:06,479 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:06,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:06,479 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2021-05-02 23:16:06,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:06,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179336061] [2021-05-02 23:16:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:06,484 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:06,485 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:06,616 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:06,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179336061] [2021-05-02 23:16:06,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [179336061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:06,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:06,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:06,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611263608] [2021-05-02 23:16:06,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:06,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:06,617 INFO L87 Difference]: Start difference. First operand 160 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:06,854 INFO L93 Difference]: Finished difference Result 299 states and 389 transitions. [2021-05-02 23:16:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 70 [2021-05-02 23:16:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:06,855 INFO L225 Difference]: With dead ends: 299 [2021-05-02 23:16:06,855 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 23:16:06,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 23:16:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2021-05-02 23:16:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.2732919254658386) internal successors, (205), 161 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) [2021-05-02 23:16:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2021-05-02 23:16:06,866 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 70 [2021-05-02 23:16:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:06,866 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2021-05-02 23:16:06,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2021-05-02 23:16:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 23:16:06,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:06,867 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:06,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:06,867 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:06,867 INFO L82 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2021-05-02 23:16:06,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:06,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419546938] [2021-05-02 23:16:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:06,871 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:06,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:07,177 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:07,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419546938] [2021-05-02 23:16:07,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [419546938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:07,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:07,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644253551] [2021-05-02 23:16:07,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:07,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:07,178 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:07,268 INFO L93 Difference]: Finished difference Result 242 states and 307 transitions. [2021-05-02 23:16:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 23:16:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:07,269 INFO L225 Difference]: With dead ends: 242 [2021-05-02 23:16:07,270 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:16:07,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:16:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 23:16:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.270440251572327) internal successors, (202), 159 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-05-02 23:16:07,281 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 73 [2021-05-02 23:16:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:07,281 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-05-02 23:16:07,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-05-02 23:16:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:16:07,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,282 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:07,282 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 1 times [2021-05-02 23:16:07,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054754244] [2021-05-02 23:16:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:07,287 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:07,288 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:07,365 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:07,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054754244] [2021-05-02 23:16:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054754244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963816738] [2021-05-02 23:16:07,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:07,366 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:07,498 INFO L93 Difference]: Finished difference Result 732 states and 956 transitions. [2021-05-02 23:16:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 23:16:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:07,501 INFO L225 Difference]: With dead ends: 732 [2021-05-02 23:16:07,501 INFO L226 Difference]: Without dead ends: 658 [2021-05-02 23:16:07,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-05-02 23:16:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 170. [2021-05-02 23:16:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 165 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-05-02 23:16:07,521 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 75 [2021-05-02 23:16:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:07,521 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-05-02 23:16:07,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-05-02 23:16:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 23:16:07,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,522 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:07,522 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 2 times [2021-05-02 23:16:07,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370326046] [2021-05-02 23:16:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:07,527 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:07,528 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:07,658 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370326046] [2021-05-02 23:16:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370326046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:07,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:07,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469622443] [2021-05-02 23:16:07,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:07,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:07,660 INFO L87 Difference]: Start difference. First operand 170 states and 214 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:07,965 INFO L93 Difference]: Finished difference Result 994 states and 1302 transitions. [2021-05-02 23:16:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 23:16:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:07,970 INFO L225 Difference]: With dead ends: 994 [2021-05-02 23:16:07,970 INFO L226 Difference]: Without dead ends: 920 [2021-05-02 23:16:07,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-02 23:16:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 174. [2021-05-02 23:16:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 169 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2021-05-02 23:16:07,996 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 79 [2021-05-02 23:16:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:07,996 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2021-05-02 23:16:07,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2021-05-02 23:16:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:16:07,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,997 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:07,998 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 3 times [2021-05-02 23:16:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118511156] [2021-05-02 23:16:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:08,003 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:08,004 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:08,143 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:08,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118511156] [2021-05-02 23:16:08,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [118511156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:08,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:08,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098372632] [2021-05-02 23:16:08,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:08,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:08,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:08,144 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:08,588 INFO L93 Difference]: Finished difference Result 1256 states and 1648 transitions. [2021-05-02 23:16:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-02 23:16:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:08,593 INFO L225 Difference]: With dead ends: 1256 [2021-05-02 23:16:08,593 INFO L226 Difference]: Without dead ends: 1182 [2021-05-02 23:16:08,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-05-02 23:16:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 178. [2021-05-02 23:16:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.283236994219653) internal successors, (222), 173 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2021-05-02 23:16:08,625 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 83 [2021-05-02 23:16:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:08,626 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2021-05-02 23:16:08,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2021-05-02 23:16:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:16:08,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:08,627 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:08,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:08,627 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1475350488, now seen corresponding path program 4 times [2021-05-02 23:16:08,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:08,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176256189] [2021-05-02 23:16:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:08,631 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:08,632 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:08,831 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176256189] [2021-05-02 23:16:08,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176256189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:08,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:08,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34567070] [2021-05-02 23:16:08,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:08,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:08,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:08,832 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:09,473 INFO L93 Difference]: Finished difference Result 1518 states and 1994 transitions. [2021-05-02 23:16:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-02 23:16:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:09,478 INFO L225 Difference]: With dead ends: 1518 [2021-05-02 23:16:09,478 INFO L226 Difference]: Without dead ends: 1444 [2021-05-02 23:16:09,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:09,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-05-02 23:16:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 182. [2021-05-02 23:16:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2881355932203389) internal successors, (228), 177 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2021-05-02 23:16:09,515 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 87 [2021-05-02 23:16:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:09,515 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2021-05-02 23:16:09,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2021-05-02 23:16:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 23:16:09,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:09,516 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:09,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:09,516 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1709610318, now seen corresponding path program 5 times [2021-05-02 23:16:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:09,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328141997] [2021-05-02 23:16:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,525 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:09,526 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:09,734 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328141997] [2021-05-02 23:16:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [328141997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:09,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222330794] [2021-05-02 23:16:09,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:09,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:09,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:09,735 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,661 INFO L93 Difference]: Finished difference Result 1780 states and 2340 transitions. [2021-05-02 23:16:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:10,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-02 23:16:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,666 INFO L225 Difference]: With dead ends: 1780 [2021-05-02 23:16:10,667 INFO L226 Difference]: Without dead ends: 1706 [2021-05-02 23:16:10,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-05-02 23:16:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 186. [2021-05-02 23:16:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.292817679558011) internal successors, (234), 181 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 238 transitions. [2021-05-02 23:16:10,717 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 238 transitions. Word has length 91 [2021-05-02 23:16:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,717 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 238 transitions. [2021-05-02 23:16:10,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 238 transitions. [2021-05-02 23:16:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:16:10,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,718 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:10,718 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -510562364, now seen corresponding path program 6 times [2021-05-02 23:16:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542151264] [2021-05-02 23:16:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,722 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,724 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:10,972 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542151264] [2021-05-02 23:16:10,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [542151264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74420286] [2021-05-02 23:16:10,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:10,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:10,974 INFO L87 Difference]: Start difference. First operand 186 states and 238 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,148 INFO L93 Difference]: Finished difference Result 2042 states and 2686 transitions. [2021-05-02 23:16:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:12,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-02 23:16:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,155 INFO L225 Difference]: With dead ends: 2042 [2021-05-02 23:16:12,155 INFO L226 Difference]: Without dead ends: 1968 [2021-05-02 23:16:12,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-05-02 23:16:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 190. [2021-05-02 23:16:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2972972972972974) internal successors, (240), 185 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2021-05-02 23:16:12,225 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 95 [2021-05-02 23:16:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,225 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2021-05-02 23:16:12,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2021-05-02 23:16:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:16:12,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,226 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:12,226 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2126389050, now seen corresponding path program 7 times [2021-05-02 23:16:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078633698] [2021-05-02 23:16:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,230 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,234 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,516 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078633698] [2021-05-02 23:16:12,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078633698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:12,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677366006] [2021-05-02 23:16:12,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:12,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:12,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:12,518 INFO L87 Difference]: Start difference. First operand 190 states and 244 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,902 INFO L93 Difference]: Finished difference Result 2057 states and 2705 transitions. [2021-05-02 23:16:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 23:16:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,909 INFO L225 Difference]: With dead ends: 2057 [2021-05-02 23:16:13,909 INFO L226 Difference]: Without dead ends: 1983 [2021-05-02 23:16:13,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-05-02 23:16:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 192. [2021-05-02 23:16:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2994652406417113) internal successors, (243), 187 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) [2021-05-02 23:16:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2021-05-02 23:16:13,973 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 99 [2021-05-02 23:16:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,973 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2021-05-02 23:16:13,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2021-05-02 23:16:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 23:16:13,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,974 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:13,975 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1611342123, now seen corresponding path program 8 times [2021-05-02 23:16:13,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120099790] [2021-05-02 23:16:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,981 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,255 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120099790] [2021-05-02 23:16:14,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120099790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023246855] [2021-05-02 23:16:14,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:14,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:14,257 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,893 INFO L93 Difference]: Finished difference Result 2188 states and 2878 transitions. [2021-05-02 23:16:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 23:16:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,900 INFO L225 Difference]: With dead ends: 2188 [2021-05-02 23:16:15,900 INFO L226 Difference]: Without dead ends: 2114 [2021-05-02 23:16:15,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-05-02 23:16:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 194. [2021-05-02 23:16:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.3015873015873016) internal successors, (246), 189 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 250 transitions. [2021-05-02 23:16:15,971 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 250 transitions. Word has length 101 [2021-05-02 23:16:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,971 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 250 transitions. [2021-05-02 23:16:15,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 250 transitions. [2021-05-02 23:16:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:15,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,972 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:15,973 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1408087540, now seen corresponding path program 1 times [2021-05-02 23:16:15,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146139099] [2021-05-02 23:16:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,977 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,978 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,684 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146139099] [2021-05-02 23:16:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [146139099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:16,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920111236] [2021-05-02 23:16:16,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:16,685 INFO L87 Difference]: Start difference. First operand 194 states and 250 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,474 INFO L93 Difference]: Finished difference Result 276 states and 356 transitions. [2021-05-02 23:16:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,476 INFO L225 Difference]: With dead ends: 276 [2021-05-02 23:16:17,476 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 23:16:17,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 23:16:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2021-05-02 23:16:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.2985074626865671) internal successors, (261), 201 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) [2021-05-02 23:16:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 265 transitions. [2021-05-02 23:16:17,547 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 265 transitions. Word has length 102 [2021-05-02 23:16:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,547 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 265 transitions. [2021-05-02 23:16:17,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 265 transitions. [2021-05-02 23:16:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:17,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,548 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:17,548 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,548 INFO L82 PathProgramCache]: Analyzing trace with hash 520185162, now seen corresponding path program 1 times [2021-05-02 23:16:17,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341858784] [2021-05-02 23:16:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,553 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,554 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,502 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341858784] [2021-05-02 23:16:19,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341858784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691286700] [2021-05-02 23:16:19,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:19,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:19,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:19,503 INFO L87 Difference]: Start difference. First operand 206 states and 265 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,877 INFO L93 Difference]: Finished difference Result 489 states and 636 transitions. [2021-05-02 23:16:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,879 INFO L225 Difference]: With dead ends: 489 [2021-05-02 23:16:20,879 INFO L226 Difference]: Without dead ends: 450 [2021-05-02 23:16:20,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1888.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-02 23:16:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-05-02 23:16:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.3037542662116042) internal successors, (382), 293 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 386 transitions. [2021-05-02 23:16:20,996 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 386 transitions. Word has length 102 [2021-05-02 23:16:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,997 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 386 transitions. [2021-05-02 23:16:20,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 386 transitions. [2021-05-02 23:16:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:20,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,998 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:20,998 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash 127158152, now seen corresponding path program 1 times [2021-05-02 23:16:20,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438247375] [2021-05-02 23:16:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,003 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,004 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438247375] [2021-05-02 23:16:21,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [438247375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:21,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688531492] [2021-05-02 23:16:21,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:21,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:21,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:21,580 INFO L87 Difference]: Start difference. First operand 298 states and 386 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,204 INFO L93 Difference]: Finished difference Result 450 states and 582 transitions. [2021-05-02 23:16:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 102 [2021-05-02 23:16:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,210 INFO L225 Difference]: With dead ends: 450 [2021-05-02 23:16:22,210 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 23:16:22,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 597.3ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 23:16:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-02 23:16:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2969283276450512) internal successors, (380), 293 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 384 transitions. [2021-05-02 23:16:22,348 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 384 transitions. Word has length 102 [2021-05-02 23:16:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,348 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 384 transitions. [2021-05-02 23:16:22,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 384 transitions. [2021-05-02 23:16:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:22,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,349 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:22,349 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2021-05-02 23:16:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077020964] [2021-05-02 23:16:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,354 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,355 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077020964] [2021-05-02 23:16:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077020964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78115742] [2021-05-02 23:16:22,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:22,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:22,911 INFO L87 Difference]: Start difference. First operand 298 states and 384 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,601 INFO L93 Difference]: Finished difference Result 450 states and 578 transitions. [2021-05-02 23:16:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,603 INFO L225 Difference]: With dead ends: 450 [2021-05-02 23:16:23,603 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 23:16:23,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 23:16:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-02 23:16:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2901023890784984) internal successors, (378), 293 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 382 transitions. [2021-05-02 23:16:23,731 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 382 transitions. Word has length 102 [2021-05-02 23:16:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,731 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 382 transitions. [2021-05-02 23:16:23,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 382 transitions. [2021-05-02 23:16:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:23,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,732 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:23,732 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2021-05-02 23:16:23,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495043741] [2021-05-02 23:16:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,737 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,738 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,259 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495043741] [2021-05-02 23:16:24,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495043741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63867484] [2021-05-02 23:16:24,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:24,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:24,260 INFO L87 Difference]: Start difference. First operand 298 states and 382 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,928 INFO L93 Difference]: Finished difference Result 450 states and 574 transitions. [2021-05-02 23:16:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,930 INFO L225 Difference]: With dead ends: 450 [2021-05-02 23:16:24,930 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 23:16:24,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 23:16:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-02 23:16:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2832764505119454) internal successors, (376), 293 states have internal predecessors, (376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 380 transitions. [2021-05-02 23:16:25,055 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 380 transitions. Word has length 102 [2021-05-02 23:16:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,055 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 380 transitions. [2021-05-02 23:16:25,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 380 transitions. [2021-05-02 23:16:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:25,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,056 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:25,056 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 4 times [2021-05-02 23:16:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654850260] [2021-05-02 23:16:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,064 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,066 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:26,371 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654850260] [2021-05-02 23:16:26,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [654850260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313887232] [2021-05-02 23:16:26,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:26,372 INFO L87 Difference]: Start difference. First operand 298 states and 380 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,873 INFO L93 Difference]: Finished difference Result 653 states and 837 transitions. [2021-05-02 23:16:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,875 INFO L225 Difference]: With dead ends: 653 [2021-05-02 23:16:26,875 INFO L226 Difference]: Without dead ends: 599 [2021-05-02 23:16:26,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 943.0ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-05-02 23:16:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 377. [2021-05-02 23:16:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 372 states have (on average 1.271505376344086) internal successors, (473), 372 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 477 transitions. [2021-05-02 23:16:27,026 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 477 transitions. Word has length 102 [2021-05-02 23:16:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,027 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 477 transitions. [2021-05-02 23:16:27,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 477 transitions. [2021-05-02 23:16:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:27,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,028 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:27,028 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 5 times [2021-05-02 23:16:27,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355719006] [2021-05-02 23:16:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,032 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,033 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,421 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355719006] [2021-05-02 23:16:28,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [355719006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:28,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928304022] [2021-05-02 23:16:28,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:28,422 INFO L87 Difference]: Start difference. First operand 377 states and 477 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,023 INFO L93 Difference]: Finished difference Result 780 states and 991 transitions. [2021-05-02 23:16:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,026 INFO L225 Difference]: With dead ends: 780 [2021-05-02 23:16:29,026 INFO L226 Difference]: Without dead ends: 729 [2021-05-02 23:16:29,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-05-02 23:16:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 504. [2021-05-02 23:16:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.2605210420841684) internal successors, (629), 499 states have internal predecessors, (629), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 633 transitions. [2021-05-02 23:16:29,248 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 633 transitions. Word has length 102 [2021-05-02 23:16:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,249 INFO L480 AbstractCegarLoop]: Abstraction has 504 states and 633 transitions. [2021-05-02 23:16:29,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 633 transitions. [2021-05-02 23:16:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:29,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,250 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:29,250 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 6 times [2021-05-02 23:16:29,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636166152] [2021-05-02 23:16:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,255 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,814 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636166152] [2021-05-02 23:16:30,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636166152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:30,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324544029] [2021-05-02 23:16:30,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:30,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:30,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:30,815 INFO L87 Difference]: Start difference. First operand 504 states and 633 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,599 INFO L93 Difference]: Finished difference Result 1031 states and 1297 transitions. [2021-05-02 23:16:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,603 INFO L225 Difference]: With dead ends: 1031 [2021-05-02 23:16:31,603 INFO L226 Difference]: Without dead ends: 983 [2021-05-02 23:16:31,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1207.0ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-05-02 23:16:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 755. [2021-05-02 23:16:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 750 states have (on average 1.252) internal successors, (939), 750 states have internal predecessors, (939), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 943 transitions. [2021-05-02 23:16:31,934 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 943 transitions. Word has length 102 [2021-05-02 23:16:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,934 INFO L480 AbstractCegarLoop]: Abstraction has 755 states and 943 transitions. [2021-05-02 23:16:31,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 943 transitions. [2021-05-02 23:16:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:31,936 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,936 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:31,936 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 7 times [2021-05-02 23:16:31,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007844617] [2021-05-02 23:16:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,940 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,940 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,503 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-05-02 23:16:33,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,696 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007844617] [2021-05-02 23:16:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007844617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286461705] [2021-05-02 23:16:33,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:33,697 INFO L87 Difference]: Start difference. First operand 755 states and 943 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,956 INFO L93 Difference]: Finished difference Result 1518 states and 1891 transitions. [2021-05-02 23:16:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:34,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 102 [2021-05-02 23:16:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,961 INFO L225 Difference]: With dead ends: 1518 [2021-05-02 23:16:34,961 INFO L226 Difference]: Without dead ends: 1473 [2021-05-02 23:16:34,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1420.6ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-05-02 23:16:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1254. [2021-05-02 23:16:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1249 states have (on average 1.2465972778222578) internal successors, (1557), 1249 states have internal predecessors, (1557), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1561 transitions. [2021-05-02 23:16:35,523 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1561 transitions. Word has length 102 [2021-05-02 23:16:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,523 INFO L480 AbstractCegarLoop]: Abstraction has 1254 states and 1561 transitions. [2021-05-02 23:16:35,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1561 transitions. [2021-05-02 23:16:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:35,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,526 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:35,526 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,526 INFO L82 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 8 times [2021-05-02 23:16:35,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171127124] [2021-05-02 23:16:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,530 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:36,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171127124] [2021-05-02 23:16:36,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171127124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:36,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474834350] [2021-05-02 23:16:36,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:36,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:36,103 INFO L87 Difference]: Start difference. First operand 1254 states and 1561 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,398 INFO L93 Difference]: Finished difference Result 1406 states and 1741 transitions. [2021-05-02 23:16:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2021-05-02 23:16:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,402 INFO L225 Difference]: With dead ends: 1406 [2021-05-02 23:16:37,402 INFO L226 Difference]: Without dead ends: 1364 [2021-05-02 23:16:37,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 668.4ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-05-02 23:16:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1362. [2021-05-02 23:16:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1357 states have (on average 1.2380250552689758) internal successors, (1680), 1357 states have internal predecessors, (1680), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1684 transitions. [2021-05-02 23:16:38,045 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1684 transitions. Word has length 102 [2021-05-02 23:16:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,045 INFO L480 AbstractCegarLoop]: Abstraction has 1362 states and 1684 transitions. [2021-05-02 23:16:38,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1684 transitions. [2021-05-02 23:16:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:38,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,047 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:38,047 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 9 times [2021-05-02 23:16:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860136238] [2021-05-02 23:16:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,053 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,054 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:38,264 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860136238] [2021-05-02 23:16:38,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860136238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:38,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928161697] [2021-05-02 23:16:38,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:38,265 INFO L87 Difference]: Start difference. First operand 1362 states and 1684 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,964 INFO L93 Difference]: Finished difference Result 8299 states and 10182 transitions. [2021-05-02 23:16:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,985 INFO L225 Difference]: With dead ends: 8299 [2021-05-02 23:16:42,985 INFO L226 Difference]: Without dead ends: 8291 [2021-05-02 23:16:42,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 373.8ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-05-02 23:16:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5246. [2021-05-02 23:16:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5246 states, 5241 states have (on average 1.2407937416523565) internal successors, (6503), 5241 states have internal predecessors, (6503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5246 states to 5246 states and 6507 transitions. [2021-05-02 23:16:45,710 INFO L78 Accepts]: Start accepts. Automaton has 5246 states and 6507 transitions. Word has length 102 [2021-05-02 23:16:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,711 INFO L480 AbstractCegarLoop]: Abstraction has 5246 states and 6507 transitions. [2021-05-02 23:16:45,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5246 states and 6507 transitions. [2021-05-02 23:16:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:45,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,717 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:45,717 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash -410122998, now seen corresponding path program 10 times [2021-05-02 23:16:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540288921] [2021-05-02 23:16:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,721 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,722 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:46,859 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540288921] [2021-05-02 23:16:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [540288921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385625328] [2021-05-02 23:16:46,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:46,860 INFO L87 Difference]: Start difference. First operand 5246 states and 6507 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,079 INFO L93 Difference]: Finished difference Result 6272 states and 7788 transitions. [2021-05-02 23:16:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 102 [2021-05-02 23:16:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,087 INFO L225 Difference]: With dead ends: 6272 [2021-05-02 23:16:50,087 INFO L226 Difference]: Without dead ends: 5880 [2021-05-02 23:16:50,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-05-02 23:16:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5144. [2021-05-02 23:16:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5139 states have (on average 1.2428488032691185) internal successors, (6387), 5139 states have internal predecessors, (6387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 6391 transitions. [2021-05-02 23:16:52,692 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 6391 transitions. Word has length 102 [2021-05-02 23:16:52,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:52,692 INFO L480 AbstractCegarLoop]: Abstraction has 5144 states and 6391 transitions. [2021-05-02 23:16:52,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 6391 transitions. [2021-05-02 23:16:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:52,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:52,699 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:52,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:52,700 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 11 times [2021-05-02 23:16:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495926145] [2021-05-02 23:16:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:52,703 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:52,704 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,938 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2021-05-02 23:16:53,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:53,328 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495926145] [2021-05-02 23:16:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [495926145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:53,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:53,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:53,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892581295] [2021-05-02 23:16:53,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:53,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:53,329 INFO L87 Difference]: Start difference. First operand 5144 states and 6391 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,524 INFO L93 Difference]: Finished difference Result 8770 states and 10843 transitions. [2021-05-02 23:16:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 102 [2021-05-02 23:16:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,530 INFO L225 Difference]: With dead ends: 8770 [2021-05-02 23:16:56,530 INFO L226 Difference]: Without dead ends: 5519 [2021-05-02 23:16:56,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2021-05-02 23:16:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5465. [2021-05-02 23:16:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5460 states have (on average 1.2380952380952381) internal successors, (6760), 5460 states have internal predecessors, (6760), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 6764 transitions. [2021-05-02 23:16:59,274 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 6764 transitions. Word has length 102 [2021-05-02 23:16:59,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:59,274 INFO L480 AbstractCegarLoop]: Abstraction has 5465 states and 6764 transitions. [2021-05-02 23:16:59,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 6764 transitions. [2021-05-02 23:16:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:59,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:59,280 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:59,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:59,281 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1561164468, now seen corresponding path program 12 times [2021-05-02 23:16:59,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:59,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999398950] [2021-05-02 23:16:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:59,285 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:59,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,007 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2021-05-02 23:17:01,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:01,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:01,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999398950] [2021-05-02 23:17:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [999398950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:01,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:01,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:17:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98877615] [2021-05-02 23:17:01,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:17:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:17:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:17:01,187 INFO L87 Difference]: Start difference. First operand 5465 states and 6764 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:05,859 INFO L93 Difference]: Finished difference Result 6564 states and 8146 transitions. [2021-05-02 23:17:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:17:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:17:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:05,868 INFO L225 Difference]: With dead ends: 6564 [2021-05-02 23:17:05,868 INFO L226 Difference]: Without dead ends: 6329 [2021-05-02 23:17:05,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2169.9ms TimeCoverageRelationStatistics Valid=356, Invalid=2506, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:17:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2021-05-02 23:17:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5655. [2021-05-02 23:17:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5650 states have (on average 1.2412389380530973) internal successors, (7013), 5650 states have internal predecessors, (7013), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 7017 transitions. [2021-05-02 23:17:08,825 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 7017 transitions. Word has length 102 [2021-05-02 23:17:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,825 INFO L480 AbstractCegarLoop]: Abstraction has 5655 states and 7017 transitions. [2021-05-02 23:17:08,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 28 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 7017 transitions. [2021-05-02 23:17:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:08,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,831 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:17:08,832 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1954191478, now seen corresponding path program 13 times [2021-05-02 23:17:08,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321886101] [2021-05-02 23:17:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,835 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:08,836 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:09,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:09,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321886101] [2021-05-02 23:17:09,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [321886101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:09,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:09,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:17:09,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397204484] [2021-05-02 23:17:09,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:17:09,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:17:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:17:09,482 INFO L87 Difference]: Start difference. First operand 5655 states and 7017 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:12,938 INFO L93 Difference]: Finished difference Result 9103 states and 11284 transitions. [2021-05-02 23:17:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:17:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 102 [2021-05-02 23:17:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:12,945 INFO L225 Difference]: With dead ends: 9103 [2021-05-02 23:17:12,945 INFO L226 Difference]: Without dead ends: 5265 [2021-05-02 23:17:12,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 814.2ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:17:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-05-02 23:17:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5052. [2021-05-02 23:17:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5047 states have (on average 1.2389538339607689) internal successors, (6253), 5047 states have internal predecessors, (6253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 6257 transitions. [2021-05-02 23:17:15,629 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 6257 transitions. Word has length 102 [2021-05-02 23:17:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:15,629 INFO L480 AbstractCegarLoop]: Abstraction has 5052 states and 6257 transitions. [2021-05-02 23:17:15,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 6257 transitions. [2021-05-02 23:17:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:15,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:15,634 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:15,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:17:15,635 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:15,635 INFO L82 PathProgramCache]: Analyzing trace with hash -653960120, now seen corresponding path program 14 times [2021-05-02 23:17:15,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:15,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404549516] [2021-05-02 23:17:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:15,639 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:15,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,270 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 41 [2021-05-02 23:17:17,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:17,434 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404549516] [2021-05-02 23:17:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [404549516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:17:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168442019] [2021-05-02 23:17:17,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:17:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:17:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:17:17,435 INFO L87 Difference]: Start difference. First operand 5052 states and 6257 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:21,809 INFO L93 Difference]: Finished difference Result 6210 states and 7674 transitions. [2021-05-02 23:17:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:17:21,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 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 102 [2021-05-02 23:17:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:21,815 INFO L225 Difference]: With dead ends: 6210 [2021-05-02 23:17:21,815 INFO L226 Difference]: Without dead ends: 5975 [2021-05-02 23:17:21,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1962.8ms TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:17:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5975 states. [2021-05-02 23:17:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5238. [2021-05-02 23:17:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 5233 states have (on average 1.2367666730364992) internal successors, (6472), 5233 states have internal predecessors, (6472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 6476 transitions. [2021-05-02 23:17:24,644 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 6476 transitions. Word has length 102 [2021-05-02 23:17:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:24,644 INFO L480 AbstractCegarLoop]: Abstraction has 5238 states and 6476 transitions. [2021-05-02 23:17:24,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 6476 transitions. [2021-05-02 23:17:24,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:24,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:24,649 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:24,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:17:24,650 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1046987130, now seen corresponding path program 15 times [2021-05-02 23:17:24,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:24,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444035780] [2021-05-02 23:17:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:24,653 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:24,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:25,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:25,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444035780] [2021-05-02 23:17:25,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444035780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:25,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:25,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:17:25,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661959486] [2021-05-02 23:17:25,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:17:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:17:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:17:25,118 INFO L87 Difference]: Start difference. First operand 5238 states and 6476 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:27,988 INFO L93 Difference]: Finished difference Result 8281 states and 10193 transitions. [2021-05-02 23:17:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:17:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:17:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:27,993 INFO L225 Difference]: With dead ends: 8281 [2021-05-02 23:17:27,993 INFO L226 Difference]: Without dead ends: 4648 [2021-05-02 23:17:27,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:17:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-05-02 23:17:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4648. [2021-05-02 23:17:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4643 states have (on average 1.2220547060090459) internal successors, (5674), 4643 states have internal predecessors, (5674), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 5678 transitions. [2021-05-02 23:17:30,516 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 5678 transitions. Word has length 102 [2021-05-02 23:17:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 4648 states and 5678 transitions. [2021-05-02 23:17:30,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 5678 transitions. [2021-05-02 23:17:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:30,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:30,521 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:30,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:17:30,521 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 710207618, now seen corresponding path program 16 times [2021-05-02 23:17:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:30,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996602743] [2021-05-02 23:17:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:30,525 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:30,526 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:31,000 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:31,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996602743] [2021-05-02 23:17:31,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1996602743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:31,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:31,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:17:31,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180867293] [2021-05-02 23:17:31,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:17:31,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:17:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:17:31,001 INFO L87 Difference]: Start difference. First operand 4648 states and 5678 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:33,903 INFO L93 Difference]: Finished difference Result 7474 states and 9095 transitions. [2021-05-02 23:17:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:17:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:17:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:33,907 INFO L225 Difference]: With dead ends: 7474 [2021-05-02 23:17:33,907 INFO L226 Difference]: Without dead ends: 4331 [2021-05-02 23:17:33,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:17:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-05-02 23:17:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4061. [2021-05-02 23:17:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 4056 states have (on average 1.2233727810650887) internal successors, (4962), 4056 states have internal predecessors, (4962), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 4966 transitions. [2021-05-02 23:17:36,127 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 4966 transitions. Word has length 102 [2021-05-02 23:17:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:36,127 INFO L480 AbstractCegarLoop]: Abstraction has 4061 states and 4966 transitions. [2021-05-02 23:17:36,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 4966 transitions. [2021-05-02 23:17:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:36,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:36,131 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:36,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:17:36,131 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:36,132 INFO L82 PathProgramCache]: Analyzing trace with hash -994254842, now seen corresponding path program 17 times [2021-05-02 23:17:36,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:36,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065929238] [2021-05-02 23:17:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:36,135 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:36,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,313 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-05-02 23:17:37,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:37,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:37,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065929238] [2021-05-02 23:17:37,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065929238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:37,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:37,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:17:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250569069] [2021-05-02 23:17:37,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:17:37,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:17:37,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:17:37,505 INFO L87 Difference]: Start difference. First operand 4061 states and 4966 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:40,359 INFO L93 Difference]: Finished difference Result 4930 states and 6033 transitions. [2021-05-02 23:17:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:17:40,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 102 [2021-05-02 23:17:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:40,364 INFO L225 Difference]: With dead ends: 4930 [2021-05-02 23:17:40,364 INFO L226 Difference]: Without dead ends: 4272 [2021-05-02 23:17:40,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 977.9ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:17:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2021-05-02 23:17:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3716. [2021-05-02 23:17:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3711 states have (on average 1.21880894637564) internal successors, (4523), 3711 states have internal predecessors, (4523), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4527 transitions. [2021-05-02 23:17:42,367 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4527 transitions. Word has length 102 [2021-05-02 23:17:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:42,367 INFO L480 AbstractCegarLoop]: Abstraction has 3716 states and 4527 transitions. [2021-05-02 23:17:42,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4527 transitions. [2021-05-02 23:17:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:42,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:42,371 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:42,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:17:42,371 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 18 times [2021-05-02 23:17:42,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:42,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852337499] [2021-05-02 23:17:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:42,374 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:42,375 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:43,967 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852337499] [2021-05-02 23:17:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852337499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:43,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:43,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:17:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337436059] [2021-05-02 23:17:43,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:17:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:17:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:17:43,968 INFO L87 Difference]: Start difference. First operand 3716 states and 4527 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:47,535 INFO L93 Difference]: Finished difference Result 4586 states and 5617 transitions. [2021-05-02 23:17:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:17:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 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 102 [2021-05-02 23:17:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:47,539 INFO L225 Difference]: With dead ends: 4586 [2021-05-02 23:17:47,539 INFO L226 Difference]: Without dead ends: 4336 [2021-05-02 23:17:47,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1744.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:17:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-05-02 23:17:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3674. [2021-05-02 23:17:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3669 states have (on average 1.2213137094576179) internal successors, (4481), 3669 states have internal predecessors, (4481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 4485 transitions. [2021-05-02 23:17:49,569 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 4485 transitions. Word has length 102 [2021-05-02 23:17:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:49,570 INFO L480 AbstractCegarLoop]: Abstraction has 3674 states and 4485 transitions. [2021-05-02 23:17:49,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 4485 transitions. [2021-05-02 23:17:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:49,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:49,574 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:49,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:17:49,574 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1363179322, now seen corresponding path program 19 times [2021-05-02 23:17:49,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:49,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852478809] [2021-05-02 23:17:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:49,579 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:49,579 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:50,874 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852478809] [2021-05-02 23:17:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852478809] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:50,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:50,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:17:50,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803943615] [2021-05-02 23:17:50,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:17:50,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:17:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:17:50,875 INFO L87 Difference]: Start difference. First operand 3674 states and 4485 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:53,572 INFO L93 Difference]: Finished difference Result 4642 states and 5665 transitions. [2021-05-02 23:17:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:17:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 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 102 [2021-05-02 23:17:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:53,576 INFO L225 Difference]: With dead ends: 4642 [2021-05-02 23:17:53,576 INFO L226 Difference]: Without dead ends: 4268 [2021-05-02 23:17:53,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1009.4ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:17:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-05-02 23:17:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3650. [2021-05-02 23:17:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3645 states have (on average 1.2205761316872428) internal successors, (4449), 3645 states have internal predecessors, (4449), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 4453 transitions. [2021-05-02 23:17:55,601 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 4453 transitions. Word has length 102 [2021-05-02 23:17:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:55,601 INFO L480 AbstractCegarLoop]: Abstraction has 3650 states and 4453 transitions. [2021-05-02 23:17:55,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 4453 transitions. [2021-05-02 23:17:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:17:55,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:55,605 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:55,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:17:55,605 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 20 times [2021-05-02 23:17:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:55,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753753629] [2021-05-02 23:17:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:55,610 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:55,611 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:55,898 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2021-05-02 23:17:56,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:56,347 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:56,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753753629] [2021-05-02 23:17:56,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [753753629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:56,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:56,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:17:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080076612] [2021-05-02 23:17:56,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:17:56,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:17:56,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:17:56,348 INFO L87 Difference]: Start difference. First operand 3650 states and 4453 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:58,967 INFO L93 Difference]: Finished difference Result 6216 states and 7555 transitions. [2021-05-02 23:17:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:17:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:17:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:58,971 INFO L225 Difference]: With dead ends: 6216 [2021-05-02 23:17:58,971 INFO L226 Difference]: Without dead ends: 3802 [2021-05-02 23:17:58,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:17:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-05-02 23:18:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3764. [2021-05-02 23:18:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3759 states have (on average 1.2136206437882415) internal successors, (4562), 3759 states have internal predecessors, (4562), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 4566 transitions. [2021-05-02 23:18:00,999 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 4566 transitions. Word has length 102 [2021-05-02 23:18:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:01,000 INFO L480 AbstractCegarLoop]: Abstraction has 3764 states and 4566 transitions. [2021-05-02 23:18:01,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 4566 transitions. [2021-05-02 23:18:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:01,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:01,003 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:01,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:18:01,003 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -349524534, now seen corresponding path program 21 times [2021-05-02 23:18:01,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:01,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361276655] [2021-05-02 23:18:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:01,007 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:01,007 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:01,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361276655] [2021-05-02 23:18:01,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361276655] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:01,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:01,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:18:01,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156684096] [2021-05-02 23:18:01,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:18:01,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:01,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:18:01,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:18:01,581 INFO L87 Difference]: Start difference. First operand 3764 states and 4566 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:04,329 INFO L93 Difference]: Finished difference Result 6098 states and 7402 transitions. [2021-05-02 23:18:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:18:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2021-05-02 23:18:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:04,333 INFO L225 Difference]: With dead ends: 6098 [2021-05-02 23:18:04,333 INFO L226 Difference]: Without dead ends: 3486 [2021-05-02 23:18:04,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:18:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-05-02 23:18:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3342. [2021-05-02 23:18:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3337 states have (on average 1.2154629907102188) internal successors, (4056), 3337 states have internal predecessors, (4056), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 4060 transitions. [2021-05-02 23:18:06,147 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 4060 transitions. Word has length 102 [2021-05-02 23:18:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:06,147 INFO L480 AbstractCegarLoop]: Abstraction has 3342 states and 4060 transitions. [2021-05-02 23:18:06,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 4060 transitions. [2021-05-02 23:18:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:06,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:06,150 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:06,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:18:06,150 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash 950706824, now seen corresponding path program 22 times [2021-05-02 23:18:06,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:06,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909133075] [2021-05-02 23:18:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:06,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:06,159 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:07,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:07,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909133075] [2021-05-02 23:18:07,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909133075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:07,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:07,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:18:07,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250323075] [2021-05-02 23:18:07,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:18:07,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:18:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:18:07,952 INFO L87 Difference]: Start difference. First operand 3342 states and 4060 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:11,596 INFO L93 Difference]: Finished difference Result 4242 states and 5192 transitions. [2021-05-02 23:18:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:18:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:18:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:11,600 INFO L225 Difference]: With dead ends: 4242 [2021-05-02 23:18:11,600 INFO L226 Difference]: Without dead ends: 4007 [2021-05-02 23:18:11,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2038.5ms TimeCoverageRelationStatistics Valid=305, Invalid=2047, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:18:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-05-02 23:18:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3396. [2021-05-02 23:18:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3391 states have (on average 1.2138012385726924) internal successors, (4116), 3391 states have internal predecessors, (4116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4120 transitions. [2021-05-02 23:18:13,508 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4120 transitions. Word has length 102 [2021-05-02 23:18:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:13,508 INFO L480 AbstractCegarLoop]: Abstraction has 3396 states and 4120 transitions. [2021-05-02 23:18:13,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4120 transitions. [2021-05-02 23:18:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:13,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:13,511 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:13,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:18:13,511 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 557679814, now seen corresponding path program 23 times [2021-05-02 23:18:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:13,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452582616] [2021-05-02 23:18:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:13,515 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:13,515 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:14,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:14,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452582616] [2021-05-02 23:18:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [452582616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:18:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715958492] [2021-05-02 23:18:14,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:18:14,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:18:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:18:14,054 INFO L87 Difference]: Start difference. First operand 3396 states and 4120 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:16,506 INFO L93 Difference]: Finished difference Result 5484 states and 6628 transitions. [2021-05-02 23:18:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:18:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:18:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:16,509 INFO L225 Difference]: With dead ends: 5484 [2021-05-02 23:18:16,509 INFO L226 Difference]: Without dead ends: 3116 [2021-05-02 23:18:16,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:18:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-05-02 23:18:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2995. [2021-05-02 23:18:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2990 states have (on average 1.208695652173913) internal successors, (3614), 2990 states have internal predecessors, (3614), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 3618 transitions. [2021-05-02 23:18:18,219 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 3618 transitions. Word has length 102 [2021-05-02 23:18:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:18,219 INFO L480 AbstractCegarLoop]: Abstraction has 2995 states and 3618 transitions. [2021-05-02 23:18:18,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 3618 transitions. [2021-05-02 23:18:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:18,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:18,221 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:18,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:18:18,222 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:18,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:18,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 24 times [2021-05-02 23:18:18,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:18,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813003694] [2021-05-02 23:18:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:18,231 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:18,232 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:19,821 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-05-02 23:18:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:20,030 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:20,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813003694] [2021-05-02 23:18:20,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [813003694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:20,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:20,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:18:20,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299455486] [2021-05-02 23:18:20,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:18:20,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:20,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:18:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:18:20,031 INFO L87 Difference]: Start difference. First operand 2995 states and 3618 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:23,691 INFO L93 Difference]: Finished difference Result 3838 states and 4681 transitions. [2021-05-02 23:18:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:18:23,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:18:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:23,695 INFO L225 Difference]: With dead ends: 3838 [2021-05-02 23:18:23,695 INFO L226 Difference]: Without dead ends: 3588 [2021-05-02 23:18:23,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2044.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:18:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2021-05-02 23:18:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2968. [2021-05-02 23:18:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2968 states, 2963 states have (on average 1.2105973675329058) internal successors, (3587), 2963 states have internal predecessors, (3587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2968 states to 2968 states and 3591 transitions. [2021-05-02 23:18:25,446 INFO L78 Accepts]: Start accepts. Automaton has 2968 states and 3591 transitions. Word has length 102 [2021-05-02 23:18:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:25,446 INFO L480 AbstractCegarLoop]: Abstraction has 2968 states and 3591 transitions. [2021-05-02 23:18:25,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2968 states and 3591 transitions. [2021-05-02 23:18:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:25,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:25,448 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:25,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:18:25,448 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 25 times [2021-05-02 23:18:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:25,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799777683] [2021-05-02 23:18:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:25,454 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:25,454 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:26,845 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799777683] [2021-05-02 23:18:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [799777683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:26,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:26,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:18:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84110016] [2021-05-02 23:18:26,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:18:26,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:18:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:18:26,846 INFO L87 Difference]: Start difference. First operand 2968 states and 3591 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:29,333 INFO L93 Difference]: Finished difference Result 3879 states and 4714 transitions. [2021-05-02 23:18:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:18:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 102 [2021-05-02 23:18:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:29,337 INFO L225 Difference]: With dead ends: 3879 [2021-05-02 23:18:29,337 INFO L226 Difference]: Without dead ends: 3523 [2021-05-02 23:18:29,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1086.2ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:18:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2021-05-02 23:18:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2944. [2021-05-02 23:18:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2939 states have (on average 1.2095951003742769) internal successors, (3555), 2939 states have internal predecessors, (3555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 3559 transitions. [2021-05-02 23:18:31,039 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 3559 transitions. Word has length 102 [2021-05-02 23:18:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:31,040 INFO L480 AbstractCegarLoop]: Abstraction has 2944 states and 3559 transitions. [2021-05-02 23:18:31,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 3559 transitions. [2021-05-02 23:18:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:31,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:31,042 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:31,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:18:31,042 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 26 times [2021-05-02 23:18:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988401688] [2021-05-02 23:18:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:31,046 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:31,046 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:31,289 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2021-05-02 23:18:31,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:31,759 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988401688] [2021-05-02 23:18:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [988401688] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:31,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:31,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:18:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834639672] [2021-05-02 23:18:31,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:18:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:18:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:18:31,760 INFO L87 Difference]: Start difference. First operand 2944 states and 3559 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:34,182 INFO L93 Difference]: Finished difference Result 5114 states and 6171 transitions. [2021-05-02 23:18:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:18:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 102 [2021-05-02 23:18:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:34,186 INFO L225 Difference]: With dead ends: 5114 [2021-05-02 23:18:34,186 INFO L226 Difference]: Without dead ends: 3064 [2021-05-02 23:18:34,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 908.7ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:18:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-05-02 23:18:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 3034. [2021-05-02 23:18:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3029 states have (on average 1.203037306041598) internal successors, (3644), 3029 states have internal predecessors, (3644), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 3648 transitions. [2021-05-02 23:18:35,921 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 3648 transitions. Word has length 102 [2021-05-02 23:18:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:35,921 INFO L480 AbstractCegarLoop]: Abstraction has 3034 states and 3648 transitions. [2021-05-02 23:18:35,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 3648 transitions. [2021-05-02 23:18:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:35,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:35,923 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:35,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:18:35,924 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1407670214, now seen corresponding path program 27 times [2021-05-02 23:18:35,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:35,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311763218] [2021-05-02 23:18:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:35,928 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:35,929 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:36,543 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311763218] [2021-05-02 23:18:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [311763218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:36,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:36,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:18:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744431788] [2021-05-02 23:18:36,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:18:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:18:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:18:36,544 INFO L87 Difference]: Start difference. First operand 3034 states and 3648 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:39,006 INFO L93 Difference]: Finished difference Result 4960 states and 5966 transitions. [2021-05-02 23:18:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:18:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2021-05-02 23:18:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:39,010 INFO L225 Difference]: With dead ends: 4960 [2021-05-02 23:18:39,010 INFO L226 Difference]: Without dead ends: 2830 [2021-05-02 23:18:39,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 843.4ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:18:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2021-05-02 23:18:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2720. [2021-05-02 23:18:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2715 states have (on average 1.2029465930018417) internal successors, (3266), 2715 states have internal predecessors, (3266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 3270 transitions. [2021-05-02 23:18:40,630 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 3270 transitions. Word has length 102 [2021-05-02 23:18:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:40,630 INFO L480 AbstractCegarLoop]: Abstraction has 2720 states and 3270 transitions. [2021-05-02 23:18:40,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 3270 transitions. [2021-05-02 23:18:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:40,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:40,632 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:40,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:18:40,632 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 28 times [2021-05-02 23:18:40,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:40,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437336818] [2021-05-02 23:18:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:40,637 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:40,637 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:41,377 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 40 [2021-05-02 23:18:42,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:42,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:42,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437336818] [2021-05-02 23:18:42,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [437336818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:42,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:42,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:18:42,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968137142] [2021-05-02 23:18:42,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:18:42,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:18:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:18:42,838 INFO L87 Difference]: Start difference. First operand 2720 states and 3270 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:49,754 INFO L93 Difference]: Finished difference Result 6757 states and 8200 transitions. [2021-05-02 23:18:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:18:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 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 102 [2021-05-02 23:18:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:49,760 INFO L225 Difference]: With dead ends: 6757 [2021-05-02 23:18:49,760 INFO L226 Difference]: Without dead ends: 6522 [2021-05-02 23:18:49,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 3701.1ms TimeCoverageRelationStatistics Valid=726, Invalid=5594, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:18:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-05-02 23:18:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 2738. [2021-05-02 23:18:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2733 states have (on average 1.2016099524332235) internal successors, (3284), 2733 states have internal predecessors, (3284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 3288 transitions. [2021-05-02 23:18:51,492 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 3288 transitions. Word has length 102 [2021-05-02 23:18:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:51,492 INFO L480 AbstractCegarLoop]: Abstraction has 2738 states and 3288 transitions. [2021-05-02 23:18:51,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 3288 transitions. [2021-05-02 23:18:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:51,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:51,495 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:51,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:18:51,495 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 29 times [2021-05-02 23:18:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:51,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094629691] [2021-05-02 23:18:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:51,499 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:51,500 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:52,051 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2021-05-02 23:18:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:52,155 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:52,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094629691] [2021-05-02 23:18:52,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094629691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:52,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:52,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:18:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641779517] [2021-05-02 23:18:52,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:18:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:18:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:18:52,156 INFO L87 Difference]: Start difference. First operand 2738 states and 3288 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:55,083 INFO L93 Difference]: Finished difference Result 3030 states and 3657 transitions. [2021-05-02 23:18:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:18:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 102 [2021-05-02 23:18:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:55,087 INFO L225 Difference]: With dead ends: 3030 [2021-05-02 23:18:55,087 INFO L226 Difference]: Without dead ends: 2832 [2021-05-02 23:18:55,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 920.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:18:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-05-02 23:18:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2738. [2021-05-02 23:18:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2733 states have (on average 1.2016099524332235) internal successors, (3284), 2733 states have internal predecessors, (3284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 3288 transitions. [2021-05-02 23:18:56,921 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 3288 transitions. Word has length 102 [2021-05-02 23:18:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:56,921 INFO L480 AbstractCegarLoop]: Abstraction has 2738 states and 3288 transitions. [2021-05-02 23:18:56,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 3288 transitions. [2021-05-02 23:18:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:18:56,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:56,924 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:56,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:18:56,924 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 30 times [2021-05-02 23:18:56,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:56,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579457394] [2021-05-02 23:18:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:56,929 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:56,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:58,223 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2021-05-02 23:18:58,450 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 45 [2021-05-02 23:18:58,650 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 41 [2021-05-02 23:18:59,574 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 40 [2021-05-02 23:18:59,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:59,758 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:59,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579457394] [2021-05-02 23:18:59,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [579457394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:59,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:59,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:18:59,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349635985] [2021-05-02 23:18:59,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:18:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:18:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:18:59,759 INFO L87 Difference]: Start difference. First operand 2738 states and 3288 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:06,633 INFO L93 Difference]: Finished difference Result 9380 states and 11255 transitions. [2021-05-02 23:19:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:19:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:19:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:06,640 INFO L225 Difference]: With dead ends: 9380 [2021-05-02 23:19:06,641 INFO L226 Difference]: Without dead ends: 5636 [2021-05-02 23:19:06,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 3475.8ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:19:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-05-02 23:19:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4301. [2021-05-02 23:19:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4301 states, 4296 states have (on average 1.1945996275605215) internal successors, (5132), 4296 states have internal predecessors, (5132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 5136 transitions. [2021-05-02 23:19:09,430 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 5136 transitions. Word has length 102 [2021-05-02 23:19:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:09,430 INFO L480 AbstractCegarLoop]: Abstraction has 4301 states and 5136 transitions. [2021-05-02 23:19:09,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 5136 transitions. [2021-05-02 23:19:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:09,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:09,433 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:09,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:19:09,433 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1865298874, now seen corresponding path program 31 times [2021-05-02 23:19:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:09,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509813769] [2021-05-02 23:19:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:09,438 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:09,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:09,735 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-05-02 23:19:09,886 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-05-02 23:19:10,053 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 42 [2021-05-02 23:19:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:10,464 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:10,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509813769] [2021-05-02 23:19:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [509813769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:10,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:10,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:19:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997940171] [2021-05-02 23:19:10,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:19:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:19:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:19:10,464 INFO L87 Difference]: Start difference. First operand 4301 states and 5136 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:14,385 INFO L93 Difference]: Finished difference Result 6667 states and 7941 transitions. [2021-05-02 23:19:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:19:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:19:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:14,391 INFO L225 Difference]: With dead ends: 6667 [2021-05-02 23:19:14,391 INFO L226 Difference]: Without dead ends: 4501 [2021-05-02 23:19:14,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:19:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-05-02 23:19:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 4388. [2021-05-02 23:19:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4383 states have (on average 1.189368012776637) internal successors, (5213), 4383 states have internal predecessors, (5213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5217 transitions. [2021-05-02 23:19:17,186 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5217 transitions. Word has length 102 [2021-05-02 23:19:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:17,186 INFO L480 AbstractCegarLoop]: Abstraction has 4388 states and 5217 transitions. [2021-05-02 23:19:17,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5217 transitions. [2021-05-02 23:19:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:17,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:17,189 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:17,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:19:17,189 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 32 times [2021-05-02 23:19:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:17,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177344820] [2021-05-02 23:19:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:17,193 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:17,194 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:17,731 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177344820] [2021-05-02 23:19:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [177344820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:17,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:17,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:19:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553031183] [2021-05-02 23:19:17,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:19:17,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:17,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:19:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:19:17,732 INFO L87 Difference]: Start difference. First operand 4388 states and 5217 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:21,625 INFO L93 Difference]: Finished difference Result 4638 states and 5535 transitions. [2021-05-02 23:19:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:19:21,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 102 [2021-05-02 23:19:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:21,630 INFO L225 Difference]: With dead ends: 4638 [2021-05-02 23:19:21,631 INFO L226 Difference]: Without dead ends: 4440 [2021-05-02 23:19:21,632 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:19:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-05-02 23:19:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 4388. [2021-05-02 23:19:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4383 states have (on average 1.189368012776637) internal successors, (5213), 4383 states have internal predecessors, (5213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5217 transitions. [2021-05-02 23:19:24,624 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5217 transitions. Word has length 102 [2021-05-02 23:19:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:24,624 INFO L480 AbstractCegarLoop]: Abstraction has 4388 states and 5217 transitions. [2021-05-02 23:19:24,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5217 transitions. [2021-05-02 23:19:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:24,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:24,628 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:24,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:19:24,628 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1904666614, now seen corresponding path program 33 times [2021-05-02 23:19:24,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:24,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67482459] [2021-05-02 23:19:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:24,645 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:24,646 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:27,197 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 39 [2021-05-02 23:19:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:27,413 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:27,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67482459] [2021-05-02 23:19:27,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [67482459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:27,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:27,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:19:27,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363735671] [2021-05-02 23:19:27,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:19:27,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:19:27,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:19:27,414 INFO L87 Difference]: Start difference. First operand 4388 states and 5217 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:32,922 INFO L93 Difference]: Finished difference Result 6092 states and 7297 transitions. [2021-05-02 23:19:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:19:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 102 [2021-05-02 23:19:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:32,929 INFO L225 Difference]: With dead ends: 6092 [2021-05-02 23:19:32,929 INFO L226 Difference]: Without dead ends: 5772 [2021-05-02 23:19:32,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2678.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:19:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2021-05-02 23:19:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4518. [2021-05-02 23:19:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 4513 states have (on average 1.1872368712608021) internal successors, (5358), 4513 states have internal predecessors, (5358), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 5362 transitions. [2021-05-02 23:19:36,068 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 5362 transitions. Word has length 102 [2021-05-02 23:19:36,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:36,068 INFO L480 AbstractCegarLoop]: Abstraction has 4518 states and 5362 transitions. [2021-05-02 23:19:36,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 5362 transitions. [2021-05-02 23:19:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:36,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:36,073 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:36,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:19:36,073 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash -181998386, now seen corresponding path program 34 times [2021-05-02 23:19:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:36,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783302944] [2021-05-02 23:19:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:36,078 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:36,080 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:36,372 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-05-02 23:19:36,516 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-05-02 23:19:36,986 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-02 23:19:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:37,113 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:37,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783302944] [2021-05-02 23:19:37,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [783302944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:37,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:37,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:19:37,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781511142] [2021-05-02 23:19:37,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:19:37,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:37,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:19:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:19:37,114 INFO L87 Difference]: Start difference. First operand 4518 states and 5362 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:41,489 INFO L93 Difference]: Finished difference Result 7596 states and 9032 transitions. [2021-05-02 23:19:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:19:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2021-05-02 23:19:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:41,495 INFO L225 Difference]: With dead ends: 7596 [2021-05-02 23:19:41,495 INFO L226 Difference]: Without dead ends: 4777 [2021-05-02 23:19:41,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1483.1ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:19:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-05-02 23:19:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4077. [2021-05-02 23:19:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4072 states have (on average 1.206041257367387) internal successors, (4911), 4072 states have internal predecessors, (4911), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 4915 transitions. [2021-05-02 23:19:44,149 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 4915 transitions. Word has length 102 [2021-05-02 23:19:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:44,150 INFO L480 AbstractCegarLoop]: Abstraction has 4077 states and 4915 transitions. [2021-05-02 23:19:44,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 4915 transitions. [2021-05-02 23:19:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:44,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:44,152 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:44,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:19:44,153 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1003439112, now seen corresponding path program 35 times [2021-05-02 23:19:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:44,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762685019] [2021-05-02 23:19:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:44,157 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:44,157 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:44,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762685019] [2021-05-02 23:19:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762685019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:19:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817509474] [2021-05-02 23:19:44,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:19:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:19:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:19:44,825 INFO L87 Difference]: Start difference. First operand 4077 states and 4915 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:48,532 INFO L93 Difference]: Finished difference Result 4298 states and 5199 transitions. [2021-05-02 23:19:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:19:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:19:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:48,537 INFO L225 Difference]: With dead ends: 4298 [2021-05-02 23:19:48,537 INFO L226 Difference]: Without dead ends: 4112 [2021-05-02 23:19:48,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:19:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2021-05-02 23:19:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 4077. [2021-05-02 23:19:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4072 states have (on average 1.206041257367387) internal successors, (4911), 4072 states have internal predecessors, (4911), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 4915 transitions. [2021-05-02 23:19:51,308 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 4915 transitions. Word has length 102 [2021-05-02 23:19:51,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:51,309 INFO L480 AbstractCegarLoop]: Abstraction has 4077 states and 4915 transitions. [2021-05-02 23:19:51,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 4915 transitions. [2021-05-02 23:19:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:19:51,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:51,312 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:51,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:19:51,312 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 610412102, now seen corresponding path program 36 times [2021-05-02 23:19:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427527958] [2021-05-02 23:19:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:51,317 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:51,318 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:51,741 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 40 [2021-05-02 23:19:52,891 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-05-02 23:19:53,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:53,070 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:53,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427527958] [2021-05-02 23:19:53,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427527958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:53,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:53,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:19:53,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100114387] [2021-05-02 23:19:53,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:19:53,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:19:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:19:53,071 INFO L87 Difference]: Start difference. First operand 4077 states and 4915 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:57,920 INFO L93 Difference]: Finished difference Result 5716 states and 6888 transitions. [2021-05-02 23:19:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:19:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 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 102 [2021-05-02 23:19:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:57,927 INFO L225 Difference]: With dead ends: 5716 [2021-05-02 23:19:57,927 INFO L226 Difference]: Without dead ends: 5466 [2021-05-02 23:19:57,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1808.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:19:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-05-02 23:20:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4681. [2021-05-02 23:20:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4676 states have (on average 1.2033789563729684) internal successors, (5627), 4676 states have internal predecessors, (5627), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 5631 transitions. [2021-05-02 23:20:01,112 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 5631 transitions. Word has length 102 [2021-05-02 23:20:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:01,112 INFO L480 AbstractCegarLoop]: Abstraction has 4681 states and 5631 transitions. [2021-05-02 23:20:01,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 5631 transitions. [2021-05-02 23:20:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:01,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:01,116 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:01,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:20:01,116 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 416633098, now seen corresponding path program 37 times [2021-05-02 23:20:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:01,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659793191] [2021-05-02 23:20:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:01,120 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:01,121 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:01,492 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 40 [2021-05-02 23:20:02,715 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 46 [2021-05-02 23:20:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:02,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:02,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659793191] [2021-05-02 23:20:02,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [659793191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:02,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:02,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:20:02,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895589606] [2021-05-02 23:20:02,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:20:02,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:20:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:20:02,874 INFO L87 Difference]: Start difference. First operand 4681 states and 5631 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:07,882 INFO L93 Difference]: Finished difference Result 5725 states and 6897 transitions. [2021-05-02 23:20:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:20:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:20:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:07,889 INFO L225 Difference]: With dead ends: 5725 [2021-05-02 23:20:07,889 INFO L226 Difference]: Without dead ends: 5478 [2021-05-02 23:20:07,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1952.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:20:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-05-02 23:20:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4621. [2021-05-02 23:20:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4616 states have (on average 1.2060225303292895) internal successors, (5567), 4616 states have internal predecessors, (5567), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 5571 transitions. [2021-05-02 23:20:11,061 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 5571 transitions. Word has length 102 [2021-05-02 23:20:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:11,061 INFO L480 AbstractCegarLoop]: Abstraction has 4621 states and 5571 transitions. [2021-05-02 23:20:11,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 5571 transitions. [2021-05-02 23:20:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:11,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:11,064 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:11,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:20:11,064 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 725205962, now seen corresponding path program 38 times [2021-05-02 23:20:11,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:11,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934763246] [2021-05-02 23:20:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:11,069 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:11,070 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:11,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:11,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934763246] [2021-05-02 23:20:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [934763246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:11,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:11,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:20:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972888096] [2021-05-02 23:20:11,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:20:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:20:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:20:11,610 INFO L87 Difference]: Start difference. First operand 4621 states and 5571 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:15,265 INFO L93 Difference]: Finished difference Result 8005 states and 9629 transitions. [2021-05-02 23:20:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:20:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:20:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:15,272 INFO L225 Difference]: With dead ends: 8005 [2021-05-02 23:20:15,272 INFO L226 Difference]: Without dead ends: 4849 [2021-05-02 23:20:15,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:20:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-05-02 23:20:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4783. [2021-05-02 23:20:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4783 states, 4778 states have (on average 1.198618668899121) internal successors, (5727), 4778 states have internal predecessors, (5727), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4783 states to 4783 states and 5731 transitions. [2021-05-02 23:20:18,604 INFO L78 Accepts]: Start accepts. Automaton has 4783 states and 5731 transitions. Word has length 102 [2021-05-02 23:20:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:18,604 INFO L480 AbstractCegarLoop]: Abstraction has 4783 states and 5731 transitions. [2021-05-02 23:20:18,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4783 states and 5731 transitions. [2021-05-02 23:20:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:18,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:18,607 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:18,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:20:18,607 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 44957194, now seen corresponding path program 39 times [2021-05-02 23:20:18,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:18,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011948413] [2021-05-02 23:20:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:18,612 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:18,613 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:19,114 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 39 [2021-05-02 23:20:19,701 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 43 [2021-05-02 23:20:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:19,895 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011948413] [2021-05-02 23:20:19,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011948413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:19,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:19,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:20:19,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213779604] [2021-05-02 23:20:19,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:20:19,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:20:19,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:20:19,895 INFO L87 Difference]: Start difference. First operand 4783 states and 5731 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:24,706 INFO L93 Difference]: Finished difference Result 5815 states and 6947 transitions. [2021-05-02 23:20:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:20:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:20:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:24,713 INFO L225 Difference]: With dead ends: 5815 [2021-05-02 23:20:24,713 INFO L226 Difference]: Without dead ends: 5533 [2021-05-02 23:20:24,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1321.7ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:20:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-05-02 23:20:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4783. [2021-05-02 23:20:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4783 states, 4778 states have (on average 1.1975722059439096) internal successors, (5722), 4778 states have internal predecessors, (5722), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4783 states to 4783 states and 5726 transitions. [2021-05-02 23:20:28,059 INFO L78 Accepts]: Start accepts. Automaton has 4783 states and 5726 transitions. Word has length 102 [2021-05-02 23:20:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:28,059 INFO L480 AbstractCegarLoop]: Abstraction has 4783 states and 5726 transitions. [2021-05-02 23:20:28,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4783 states and 5726 transitions. [2021-05-02 23:20:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:28,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:28,062 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:28,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:20:28,063 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1497426230, now seen corresponding path program 40 times [2021-05-02 23:20:28,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:28,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038515569] [2021-05-02 23:20:28,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:28,073 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:28,074 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:29,020 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 44 [2021-05-02 23:20:29,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:29,202 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:29,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038515569] [2021-05-02 23:20:29,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038515569] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:29,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:29,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:20:29,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194101946] [2021-05-02 23:20:29,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:20:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:29,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:20:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:20:29,203 INFO L87 Difference]: Start difference. First operand 4783 states and 5726 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:35,914 INFO L93 Difference]: Finished difference Result 9047 states and 10788 transitions. [2021-05-02 23:20:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:20:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 102 [2021-05-02 23:20:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:35,923 INFO L225 Difference]: With dead ends: 9047 [2021-05-02 23:20:35,924 INFO L226 Difference]: Without dead ends: 8255 [2021-05-02 23:20:35,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 945.8ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:20:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-05-02 23:20:39,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 4789. [2021-05-02 23:20:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 4784 states have (on average 1.1969063545150502) internal successors, (5726), 4784 states have internal predecessors, (5726), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 5730 transitions. [2021-05-02 23:20:39,390 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 5730 transitions. Word has length 102 [2021-05-02 23:20:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:39,390 INFO L480 AbstractCegarLoop]: Abstraction has 4789 states and 5730 transitions. [2021-05-02 23:20:39,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 5730 transitions. [2021-05-02 23:20:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:39,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:39,393 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:39,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:20:39,393 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1558120830, now seen corresponding path program 41 times [2021-05-02 23:20:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:39,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477088916] [2021-05-02 23:20:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:39,398 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:39,398 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:39,661 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2021-05-02 23:20:40,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:40,164 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477088916] [2021-05-02 23:20:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477088916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:40,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:40,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:20:40,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294122390] [2021-05-02 23:20:40,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:20:40,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:20:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:20:40,165 INFO L87 Difference]: Start difference. First operand 4789 states and 5730 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:44,534 INFO L93 Difference]: Finished difference Result 5457 states and 6511 transitions. [2021-05-02 23:20:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:20:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 102 [2021-05-02 23:20:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:44,542 INFO L225 Difference]: With dead ends: 5457 [2021-05-02 23:20:44,542 INFO L226 Difference]: Without dead ends: 5175 [2021-05-02 23:20:44,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 941.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:20:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2021-05-02 23:20:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 4846. [2021-05-02 23:20:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4846 states, 4841 states have (on average 1.1956207395166287) internal successors, (5788), 4841 states have internal predecessors, (5788), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 5792 transitions. [2021-05-02 23:20:48,064 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 5792 transitions. Word has length 102 [2021-05-02 23:20:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:48,064 INFO L480 AbstractCegarLoop]: Abstraction has 4846 states and 5792 transitions. [2021-05-02 23:20:48,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 5792 transitions. [2021-05-02 23:20:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:48,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:48,067 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:48,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:20:48,067 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:48,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1194463042, now seen corresponding path program 42 times [2021-05-02 23:20:48,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:48,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140105456] [2021-05-02 23:20:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:48,072 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:48,073 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:48,586 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-02 23:20:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:48,694 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140105456] [2021-05-02 23:20:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [140105456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:48,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:48,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:20:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917878572] [2021-05-02 23:20:48,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:20:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:20:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:20:48,695 INFO L87 Difference]: Start difference. First operand 4846 states and 5792 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:53,475 INFO L93 Difference]: Finished difference Result 8777 states and 10496 transitions. [2021-05-02 23:20:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:20:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:20:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:53,482 INFO L225 Difference]: With dead ends: 8777 [2021-05-02 23:20:53,482 INFO L226 Difference]: Without dead ends: 5597 [2021-05-02 23:20:53,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:20:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-05-02 23:20:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5338. [2021-05-02 23:20:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5333 states have (on average 1.1974498406150385) internal successors, (6386), 5333 states have internal predecessors, (6386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 6390 transitions. [2021-05-02 23:20:57,294 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 6390 transitions. Word has length 102 [2021-05-02 23:20:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:57,294 INFO L480 AbstractCegarLoop]: Abstraction has 5338 states and 6390 transitions. [2021-05-02 23:20:57,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 6390 transitions. [2021-05-02 23:20:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:20:57,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:57,297 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:57,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:20:57,297 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1787981558, now seen corresponding path program 43 times [2021-05-02 23:20:57,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:57,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581029186] [2021-05-02 23:20:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:57,302 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:57,303 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:57,565 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2021-05-02 23:20:58,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:58,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581029186] [2021-05-02 23:20:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [581029186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:58,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:58,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:20:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409982650] [2021-05-02 23:20:58,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:20:58,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:20:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:20:58,081 INFO L87 Difference]: Start difference. First operand 5338 states and 6390 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:03,093 INFO L93 Difference]: Finished difference Result 6053 states and 7210 transitions. [2021-05-02 23:21:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:21:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:21:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:03,100 INFO L225 Difference]: With dead ends: 6053 [2021-05-02 23:21:03,100 INFO L226 Difference]: Without dead ends: 5738 [2021-05-02 23:21:03,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:21:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2021-05-02 23:21:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5365. [2021-05-02 23:21:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5365 states, 5360 states have (on average 1.1955223880597015) internal successors, (6408), 5360 states have internal predecessors, (6408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 6412 transitions. [2021-05-02 23:21:07,009 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 6412 transitions. Word has length 102 [2021-05-02 23:21:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:07,009 INFO L480 AbstractCegarLoop]: Abstraction has 5365 states and 6412 transitions. [2021-05-02 23:21:07,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 6412 transitions. [2021-05-02 23:21:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:21:07,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:07,013 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:07,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:21:07,013 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash 964602314, now seen corresponding path program 44 times [2021-05-02 23:21:07,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:07,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513281963] [2021-05-02 23:21:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:07,018 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:07,018 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:07,583 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-02 23:21:07,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:07,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513281963] [2021-05-02 23:21:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513281963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:07,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:07,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:21:07,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255768407] [2021-05-02 23:21:07,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:21:07,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:21:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:21:07,703 INFO L87 Difference]: Start difference. First operand 5365 states and 6412 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:12,676 INFO L93 Difference]: Finished difference Result 9359 states and 11126 transitions. [2021-05-02 23:21:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:21:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 102 [2021-05-02 23:21:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:12,684 INFO L225 Difference]: With dead ends: 9359 [2021-05-02 23:21:12,684 INFO L226 Difference]: Without dead ends: 5924 [2021-05-02 23:21:12,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 867.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:21:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2021-05-02 23:21:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 5533. [2021-05-02 23:21:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 5528 states have (on average 1.189218523878437) internal successors, (6574), 5528 states have internal predecessors, (6574), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 6578 transitions. [2021-05-02 23:21:16,803 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 6578 transitions. Word has length 102 [2021-05-02 23:21:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:16,803 INFO L480 AbstractCegarLoop]: Abstraction has 5533 states and 6578 transitions. [2021-05-02 23:21:16,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 6578 transitions. [2021-05-02 23:21:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:21:16,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:16,806 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:16,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:21:16,806 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1673675650, now seen corresponding path program 45 times [2021-05-02 23:21:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91550251] [2021-05-02 23:21:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:16,811 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:16,812 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:17,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:17,621 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91550251] [2021-05-02 23:21:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [91550251] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:17,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:17,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:21:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195651597] [2021-05-02 23:21:17,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:21:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:21:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:21:17,622 INFO L87 Difference]: Start difference. First operand 5533 states and 6578 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:23,030 INFO L93 Difference]: Finished difference Result 6289 states and 7441 transitions. [2021-05-02 23:21:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:21:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 102 [2021-05-02 23:21:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:23,038 INFO L225 Difference]: With dead ends: 6289 [2021-05-02 23:21:23,038 INFO L226 Difference]: Without dead ends: 5953 [2021-05-02 23:21:23,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1105.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:21:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-05-02 23:21:27,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 5635. [2021-05-02 23:21:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5635 states, 5630 states have (on average 1.185790408525755) internal successors, (6676), 5630 states have internal predecessors, (6676), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5635 states to 5635 states and 6680 transitions. [2021-05-02 23:21:27,232 INFO L78 Accepts]: Start accepts. Automaton has 5635 states and 6680 transitions. Word has length 102 [2021-05-02 23:21:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:27,232 INFO L480 AbstractCegarLoop]: Abstraction has 5635 states and 6680 transitions. [2021-05-02 23:21:27,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5635 states and 6680 transitions. [2021-05-02 23:21:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:21:27,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:27,236 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:27,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:21:27,236 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 131292226, now seen corresponding path program 46 times [2021-05-02 23:21:27,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:27,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478305543] [2021-05-02 23:21:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:27,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:27,250 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:27,876 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-02 23:21:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:27,984 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:27,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478305543] [2021-05-02 23:21:27,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478305543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:27,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:27,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:21:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106945951] [2021-05-02 23:21:27,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:21:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:21:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:21:27,985 INFO L87 Difference]: Start difference. First operand 5635 states and 6680 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:33,503 INFO L93 Difference]: Finished difference Result 8969 states and 10519 transitions. [2021-05-02 23:21:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:21:33,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:21:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:33,512 INFO L225 Difference]: With dead ends: 8969 [2021-05-02 23:21:33,512 INFO L226 Difference]: Without dead ends: 6269 [2021-05-02 23:21:33,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:21:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-05-02 23:21:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 5728. [2021-05-02 23:21:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5723 states have (on average 1.1817228726192557) internal successors, (6763), 5723 states have internal predecessors, (6763), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 6767 transitions. [2021-05-02 23:21:37,865 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 6767 transitions. Word has length 102 [2021-05-02 23:21:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:37,866 INFO L480 AbstractCegarLoop]: Abstraction has 5728 states and 6767 transitions. [2021-05-02 23:21:37,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 6767 transitions. [2021-05-02 23:21:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:21:37,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:37,869 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:37,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:21:37,870 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -937991158, now seen corresponding path program 47 times [2021-05-02 23:21:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:37,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230631820] [2021-05-02 23:21:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:37,875 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:37,876 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:38,247 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-05-02 23:21:38,665 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-02 23:21:38,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:38,782 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230631820] [2021-05-02 23:21:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230631820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:38,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:38,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:21:38,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596181441] [2021-05-02 23:21:38,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:21:38,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:21:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:21:38,783 INFO L87 Difference]: Start difference. First operand 5728 states and 6767 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:44,652 INFO L93 Difference]: Finished difference Result 6407 states and 7543 transitions. [2021-05-02 23:21:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:21:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:21:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:44,663 INFO L225 Difference]: With dead ends: 6407 [2021-05-02 23:21:44,663 INFO L226 Difference]: Without dead ends: 6059 [2021-05-02 23:21:44,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1252.6ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:21:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-05-02 23:21:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 5695. [2021-05-02 23:21:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5695 states, 5690 states have (on average 1.1818980667838312) internal successors, (6725), 5690 states have internal predecessors, (6725), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5695 states to 5695 states and 6729 transitions. [2021-05-02 23:21:49,754 INFO L78 Accepts]: Start accepts. Automaton has 5695 states and 6729 transitions. Word has length 102 [2021-05-02 23:21:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:49,754 INFO L480 AbstractCegarLoop]: Abstraction has 5695 states and 6729 transitions. [2021-05-02 23:21:49,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5695 states and 6729 transitions. [2021-05-02 23:21:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:21:49,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:49,760 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:49,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:21:49,760 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1814592714, now seen corresponding path program 48 times [2021-05-02 23:21:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617708875] [2021-05-02 23:21:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:49,768 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:49,770 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:50,800 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-05-02 23:21:50,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:50,971 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:50,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617708875] [2021-05-02 23:21:50,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617708875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:50,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:50,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:21:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409792171] [2021-05-02 23:21:50,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:21:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:21:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:21:50,973 INFO L87 Difference]: Start difference. First operand 5695 states and 6729 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:57,868 INFO L93 Difference]: Finished difference Result 10038 states and 11789 transitions. [2021-05-02 23:21:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:21:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 102 [2021-05-02 23:21:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:57,879 INFO L225 Difference]: With dead ends: 10038 [2021-05-02 23:21:57,879 INFO L226 Difference]: Without dead ends: 6484 [2021-05-02 23:21:57,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1579.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:21:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6484 states. [2021-05-02 23:22:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6484 to 5224. [2021-05-02 23:22:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5224 states, 5219 states have (on average 1.197547422877946) internal successors, (6250), 5219 states have internal predecessors, (6250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 6254 transitions. [2021-05-02 23:22:02,422 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 6254 transitions. Word has length 102 [2021-05-02 23:22:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:02,422 INFO L480 AbstractCegarLoop]: Abstraction has 5224 states and 6254 transitions. [2021-05-02 23:22:02,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 6254 transitions. [2021-05-02 23:22:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:22:02,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:02,428 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:02,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:22:02,429 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 49 times [2021-05-02 23:22:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823450573] [2021-05-02 23:22:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:02,438 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:02,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,834 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-05-02 23:22:02,986 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 41 [2021-05-02 23:22:03,530 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-02 23:22:03,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:03,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:03,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823450573] [2021-05-02 23:22:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823450573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:03,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:03,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:22:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877889466] [2021-05-02 23:22:03,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:22:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:22:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:22:03,707 INFO L87 Difference]: Start difference. First operand 5224 states and 6254 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:10,216 INFO L93 Difference]: Finished difference Result 5762 states and 6876 transitions. [2021-05-02 23:22:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:22:10,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 102 [2021-05-02 23:22:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:10,225 INFO L225 Difference]: With dead ends: 5762 [2021-05-02 23:22:10,225 INFO L226 Difference]: Without dead ends: 5486 [2021-05-02 23:22:10,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1846.4ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:22:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-05-02 23:22:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5191. [2021-05-02 23:22:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5186 states have (on average 1.1988044735827228) internal successors, (6217), 5186 states have internal predecessors, (6217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 6221 transitions. [2021-05-02 23:22:14,926 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 6221 transitions. Word has length 102 [2021-05-02 23:22:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:14,926 INFO L480 AbstractCegarLoop]: Abstraction has 5191 states and 6221 transitions. [2021-05-02 23:22:14,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 6221 transitions. [2021-05-02 23:22:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:22:14,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:14,932 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:14,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:22:14,932 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 50 times [2021-05-02 23:22:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:14,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740140301] [2021-05-02 23:22:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:14,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:14,957 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:15,294 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2021-05-02 23:22:15,495 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-05-02 23:22:15,669 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 42 [2021-05-02 23:22:16,257 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-05-02 23:22:16,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:16,417 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740140301] [2021-05-02 23:22:16,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740140301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:16,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:16,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:22:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016025394] [2021-05-02 23:22:16,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:22:16,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:16,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:22:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:22:16,419 INFO L87 Difference]: Start difference. First operand 5191 states and 6221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:23,083 INFO L93 Difference]: Finished difference Result 5595 states and 6699 transitions. [2021-05-02 23:22:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:22:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:22:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:23,096 INFO L225 Difference]: With dead ends: 5595 [2021-05-02 23:22:23,096 INFO L226 Difference]: Without dead ends: 5346 [2021-05-02 23:22:23,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2169.0ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:22:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-05-02 23:22:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 5101. [2021-05-02 23:22:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5101 states, 5096 states have (on average 1.2013343799058085) internal successors, (6122), 5096 states have internal predecessors, (6122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5101 states to 5101 states and 6126 transitions. [2021-05-02 23:22:27,073 INFO L78 Accepts]: Start accepts. Automaton has 5101 states and 6126 transitions. Word has length 102 [2021-05-02 23:22:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:27,073 INFO L480 AbstractCegarLoop]: Abstraction has 5101 states and 6126 transitions. [2021-05-02 23:22:27,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5101 states and 6126 transitions. [2021-05-02 23:22:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:22:27,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:27,077 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:27,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:22:27,077 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 51 times [2021-05-02 23:22:27,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:27,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415098379] [2021-05-02 23:22:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:27,082 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:27,083 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:27,874 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 43 [2021-05-02 23:22:28,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:28,109 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:28,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415098379] [2021-05-02 23:22:28,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1415098379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:28,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:28,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:22:28,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584532186] [2021-05-02 23:22:28,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:22:28,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:22:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:22:28,110 INFO L87 Difference]: Start difference. First operand 5101 states and 6126 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:34,682 INFO L93 Difference]: Finished difference Result 7046 states and 8444 transitions. [2021-05-02 23:22:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:22:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:22:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:34,696 INFO L225 Difference]: With dead ends: 7046 [2021-05-02 23:22:34,697 INFO L226 Difference]: Without dead ends: 6667 [2021-05-02 23:22:34,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:22:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-05-02 23:22:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 5666. [2021-05-02 23:22:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5661 states have (on average 1.2017311429076134) internal successors, (6803), 5661 states have internal predecessors, (6803), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 6807 transitions. [2021-05-02 23:22:39,773 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 6807 transitions. Word has length 102 [2021-05-02 23:22:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:39,774 INFO L480 AbstractCegarLoop]: Abstraction has 5666 states and 6807 transitions. [2021-05-02 23:22:39,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 6807 transitions. [2021-05-02 23:22:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:22:39,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:39,778 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:39,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:22:39,778 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:39,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 52 times [2021-05-02 23:22:39,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:39,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186924934] [2021-05-02 23:22:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:39,784 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:39,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:40,222 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 136 [2021-05-02 23:22:41,297 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 43 [2021-05-02 23:22:41,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:41,512 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:41,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186924934] [2021-05-02 23:22:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [186924934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:41,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:41,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:22:41,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110280249] [2021-05-02 23:22:41,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:22:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:22:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:22:41,513 INFO L87 Difference]: Start difference. First operand 5666 states and 6807 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:48,417 INFO L93 Difference]: Finished difference Result 6986 states and 8373 transitions. [2021-05-02 23:22:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:22:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:22:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:48,427 INFO L225 Difference]: With dead ends: 6986 [2021-05-02 23:22:48,427 INFO L226 Difference]: Without dead ends: 6652 [2021-05-02 23:22:48,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1563.4ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:22:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2021-05-02 23:22:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 5777. [2021-05-02 23:22:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5772 states have (on average 1.198891198891199) internal successors, (6920), 5772 states have internal predecessors, (6920), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 6924 transitions. [2021-05-02 23:22:53,131 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 6924 transitions. Word has length 102 [2021-05-02 23:22:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:53,131 INFO L480 AbstractCegarLoop]: Abstraction has 5777 states and 6924 transitions. [2021-05-02 23:22:53,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 6924 transitions. [2021-05-02 23:22:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:22:53,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:53,135 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:53,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:22:53,135 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1881743098, now seen corresponding path program 53 times [2021-05-02 23:22:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229256931] [2021-05-02 23:22:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:53,141 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:53,142 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:54,647 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 45 [2021-05-02 23:22:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:54,803 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:54,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229256931] [2021-05-02 23:22:54,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [229256931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:54,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:54,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:22:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005992491] [2021-05-02 23:22:54,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:22:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:22:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:22:54,805 INFO L87 Difference]: Start difference. First operand 5777 states and 6924 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:02,074 INFO L93 Difference]: Finished difference Result 6995 states and 8382 transitions. [2021-05-02 23:23:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:23:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 102 [2021-05-02 23:23:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:02,085 INFO L225 Difference]: With dead ends: 6995 [2021-05-02 23:23:02,085 INFO L226 Difference]: Without dead ends: 6664 [2021-05-02 23:23:02,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1707.8ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:23:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2021-05-02 23:23:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 5666. [2021-05-02 23:23:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5661 states have (on average 1.2017311429076134) internal successors, (6803), 5661 states have internal predecessors, (6803), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 6807 transitions. [2021-05-02 23:23:06,579 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 6807 transitions. Word has length 102 [2021-05-02 23:23:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:06,579 INFO L480 AbstractCegarLoop]: Abstraction has 5666 states and 6807 transitions. [2021-05-02 23:23:06,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 6807 transitions. [2021-05-02 23:23:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:23:06,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:06,583 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:06,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:23:06,583 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 54 times [2021-05-02 23:23:06,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:06,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293422110] [2021-05-02 23:23:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:06,591 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:06,591 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:07,014 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 37 [2021-05-02 23:23:07,184 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 38 [2021-05-02 23:23:07,344 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 34 [2021-05-02 23:23:07,879 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 55 [2021-05-02 23:23:08,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:08,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:08,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293422110] [2021-05-02 23:23:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [293422110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:08,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:23:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986928417] [2021-05-02 23:23:08,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:23:08,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:23:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:23:08,054 INFO L87 Difference]: Start difference. First operand 5666 states and 6807 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:17,151 INFO L93 Difference]: Finished difference Result 11431 states and 13625 transitions. [2021-05-02 23:23:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:23:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 102 [2021-05-02 23:23:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:17,167 INFO L225 Difference]: With dead ends: 11431 [2021-05-02 23:23:17,167 INFO L226 Difference]: Without dead ends: 10511 [2021-05-02 23:23:17,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1187.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:23:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-05-02 23:23:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 9274. [2021-05-02 23:23:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9269 states have (on average 1.2028266263890388) internal successors, (11149), 9269 states have internal predecessors, (11149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 11153 transitions. [2021-05-02 23:23:24,675 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 11153 transitions. Word has length 102 [2021-05-02 23:23:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:24,675 INFO L480 AbstractCegarLoop]: Abstraction has 9274 states and 11153 transitions. [2021-05-02 23:23:24,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 11153 transitions. [2021-05-02 23:23:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:23:24,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:24,681 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:24,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:23:24,681 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1615238586, now seen corresponding path program 55 times [2021-05-02 23:23:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087729853] [2021-05-02 23:23:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:24,688 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:24,689 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:25,096 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 33 [2021-05-02 23:23:25,591 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 18 [2021-05-02 23:23:25,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:25,657 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087729853] [2021-05-02 23:23:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087729853] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:25,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:25,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:23:25,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916458076] [2021-05-02 23:23:25,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:23:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:25,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:23:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:23:25,658 INFO L87 Difference]: Start difference. First operand 9274 states and 11153 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:34,709 INFO L93 Difference]: Finished difference Result 10542 states and 12663 transitions. [2021-05-02 23:23:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:23:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 102 [2021-05-02 23:23:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:34,728 INFO L225 Difference]: With dead ends: 10542 [2021-05-02 23:23:34,728 INFO L226 Difference]: Without dead ends: 10048 [2021-05-02 23:23:34,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:23:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2021-05-02 23:23:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 9268. [2021-05-02 23:23:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9263 states have (on average 1.201986397495412) internal successors, (11134), 9263 states have internal predecessors, (11134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 11138 transitions. [2021-05-02 23:23:42,282 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 11138 transitions. Word has length 102 [2021-05-02 23:23:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:42,282 INFO L480 AbstractCegarLoop]: Abstraction has 9268 states and 11138 transitions. [2021-05-02 23:23:42,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 11138 transitions. [2021-05-02 23:23:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:23:42,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:42,290 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:42,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:23:42,290 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 56 times [2021-05-02 23:23:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:42,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664328016] [2021-05-02 23:23:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:42,296 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:42,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:43,016 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 33 [2021-05-02 23:23:43,539 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 60 [2021-05-02 23:23:43,717 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2021-05-02 23:23:43,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:43,776 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:43,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664328016] [2021-05-02 23:23:43,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664328016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:23:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037708480] [2021-05-02 23:23:43,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:23:43,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:23:43,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:23:43,777 INFO L87 Difference]: Start difference. First operand 9268 states and 11138 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:53,229 INFO L93 Difference]: Finished difference Result 11250 states and 13369 transitions. [2021-05-02 23:23:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:23:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 102 [2021-05-02 23:23:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:53,244 INFO L225 Difference]: With dead ends: 11250 [2021-05-02 23:23:53,244 INFO L226 Difference]: Without dead ends: 10466 [2021-05-02 23:23:53,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1207.3ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:23:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2021-05-02 23:24:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 9268. [2021-05-02 23:24:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9268 states, 9263 states have (on average 1.1966965346000216) internal successors, (11085), 9263 states have internal predecessors, (11085), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9268 states to 9268 states and 11089 transitions. [2021-05-02 23:24:01,624 INFO L78 Accepts]: Start accepts. Automaton has 9268 states and 11089 transitions. Word has length 102 [2021-05-02 23:24:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:01,625 INFO L480 AbstractCegarLoop]: Abstraction has 9268 states and 11089 transitions. [2021-05-02 23:24:01,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 9268 states and 11089 transitions. [2021-05-02 23:24:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:24:01,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:01,635 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:01,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:24:01,636 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 57 times [2021-05-02 23:24:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:01,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442962620] [2021-05-02 23:24:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:01,644 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:01,646 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:02,166 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 33 [2021-05-02 23:24:02,382 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 30 [2021-05-02 23:24:02,886 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 20 [2021-05-02 23:24:02,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:02,952 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:02,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442962620] [2021-05-02 23:24:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [442962620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:24:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232546953] [2021-05-02 23:24:02,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:24:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:24:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:24:02,953 INFO L87 Difference]: Start difference. First operand 9268 states and 11089 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:12,069 INFO L93 Difference]: Finished difference Result 11205 states and 13284 transitions. [2021-05-02 23:24:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:24:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 102 [2021-05-02 23:24:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:12,083 INFO L225 Difference]: With dead ends: 11205 [2021-05-02 23:24:12,083 INFO L226 Difference]: Without dead ends: 9995 [2021-05-02 23:24:12,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:24:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-05-02 23:24:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 9205. [2021-05-02 23:24:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9205 states, 9200 states have (on average 1.1880434782608695) internal successors, (10930), 9200 states have internal predecessors, (10930), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9205 states to 9205 states and 10934 transitions. [2021-05-02 23:24:19,592 INFO L78 Accepts]: Start accepts. Automaton has 9205 states and 10934 transitions. Word has length 102 [2021-05-02 23:24:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:19,593 INFO L480 AbstractCegarLoop]: Abstraction has 9205 states and 10934 transitions. [2021-05-02 23:24:19,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 9205 states and 10934 transitions. [2021-05-02 23:24:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:24:19,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:19,603 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:19,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:24:19,603 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1517967882, now seen corresponding path program 58 times [2021-05-02 23:24:19,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:19,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072052744] [2021-05-02 23:24:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:19,611 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:19,613 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:20,270 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 37 [2021-05-02 23:24:20,562 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 37 [2021-05-02 23:24:20,811 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 33 [2021-05-02 23:24:21,617 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 55 [2021-05-02 23:24:21,854 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 29 [2021-05-02 23:24:21,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:21,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:21,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072052744] [2021-05-02 23:24:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072052744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:21,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:21,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:24:21,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868712639] [2021-05-02 23:24:21,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:24:21,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:24:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:24:21,935 INFO L87 Difference]: Start difference. First operand 9205 states and 10934 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:32,518 INFO L93 Difference]: Finished difference Result 10425 states and 12386 transitions. [2021-05-02 23:24:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:24:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 102 [2021-05-02 23:24:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:32,538 INFO L225 Difference]: With dead ends: 10425 [2021-05-02 23:24:32,538 INFO L226 Difference]: Without dead ends: 9961 [2021-05-02 23:24:32,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2139.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:24:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-05-02 23:24:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 9181. [2021-05-02 23:24:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9176 states have (on average 1.1875544899738448) internal successors, (10897), 9176 states have internal predecessors, (10897), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 10901 transitions. [2021-05-02 23:24:41,042 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 10901 transitions. Word has length 102 [2021-05-02 23:24:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:41,042 INFO L480 AbstractCegarLoop]: Abstraction has 9181 states and 10901 transitions. [2021-05-02 23:24:41,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 10901 transitions. [2021-05-02 23:24:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:24:41,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:41,050 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:41,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:24:41,050 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash -587409014, now seen corresponding path program 59 times [2021-05-02 23:24:41,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:41,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597425162] [2021-05-02 23:24:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:41,055 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:41,056 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:41,892 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 48 [2021-05-02 23:24:42,202 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 38 [2021-05-02 23:24:42,472 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 34 [2021-05-02 23:24:43,178 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 43 [2021-05-02 23:24:43,411 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 21 [2021-05-02 23:24:43,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:43,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:43,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597425162] [2021-05-02 23:24:43,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [597425162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:43,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:24:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980917448] [2021-05-02 23:24:43,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:24:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:24:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:24:43,523 INFO L87 Difference]: Start difference. First operand 9181 states and 10901 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:53,810 INFO L93 Difference]: Finished difference Result 10628 states and 12561 transitions. [2021-05-02 23:24:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:24:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 102 [2021-05-02 23:24:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:53,824 INFO L225 Difference]: With dead ends: 10628 [2021-05-02 23:24:53,824 INFO L226 Difference]: Without dead ends: 9882 [2021-05-02 23:24:53,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2638.5ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:24:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9882 states. [2021-05-02 23:25:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9882 to 8741. [2021-05-02 23:25:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8736 states have (on average 1.1854395604395604) internal successors, (10356), 8736 states have internal predecessors, (10356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 10360 transitions. [2021-05-02 23:25:01,014 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 10360 transitions. Word has length 102 [2021-05-02 23:25:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:01,014 INFO L480 AbstractCegarLoop]: Abstraction has 8741 states and 10360 transitions. [2021-05-02 23:25:01,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 10360 transitions. [2021-05-02 23:25:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:25:01,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:01,020 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:01,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:25:01,020 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2050380998, now seen corresponding path program 60 times [2021-05-02 23:25:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:01,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21117920] [2021-05-02 23:25:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:01,026 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:01,027 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:01,537 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-05-02 23:25:02,881 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-05-02 23:25:03,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:03,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:03,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21117920] [2021-05-02 23:25:03,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [21117920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:03,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:03,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:25:03,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523072427] [2021-05-02 23:25:03,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:25:03,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:03,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:25:03,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:25:03,089 INFO L87 Difference]: Start difference. First operand 8741 states and 10360 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:13,142 INFO L93 Difference]: Finished difference Result 10143 states and 11975 transitions. [2021-05-02 23:25:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:25:13,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 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 102 [2021-05-02 23:25:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:13,156 INFO L225 Difference]: With dead ends: 10143 [2021-05-02 23:25:13,157 INFO L226 Difference]: Without dead ends: 9882 [2021-05-02 23:25:13,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2236.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:25:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9882 states. [2021-05-02 23:25:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9882 to 8924. [2021-05-02 23:25:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8919 states have (on average 1.1825316739544791) internal successors, (10547), 8919 states have internal predecessors, (10547), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 10551 transitions. [2021-05-02 23:25:20,686 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 10551 transitions. Word has length 102 [2021-05-02 23:25:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:20,687 INFO L480 AbstractCegarLoop]: Abstraction has 8924 states and 10551 transitions. [2021-05-02 23:25:20,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 10551 transitions. [2021-05-02 23:25:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:25:20,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:20,692 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:20,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:25:20,693 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1856601994, now seen corresponding path program 61 times [2021-05-02 23:25:20,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:20,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048308471] [2021-05-02 23:25:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:20,698 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:20,699 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:21,226 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 42 [2021-05-02 23:25:22,635 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 45 [2021-05-02 23:25:22,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:22,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:22,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048308471] [2021-05-02 23:25:22,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048308471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:22,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:22,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:25:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454260119] [2021-05-02 23:25:22,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:25:22,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:25:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:25:22,811 INFO L87 Difference]: Start difference. First operand 8924 states and 10551 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:28,305 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-02 23:25:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:34,097 INFO L93 Difference]: Finished difference Result 10132 states and 11960 transitions. [2021-05-02 23:25:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:25:34,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:25:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:34,119 INFO L225 Difference]: With dead ends: 10132 [2021-05-02 23:25:34,120 INFO L226 Difference]: Without dead ends: 9874 [2021-05-02 23:25:34,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2314.8ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:25:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-05-02 23:25:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8825. [2021-05-02 23:25:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8825 states, 8820 states have (on average 1.1845804988662132) internal successors, (10448), 8820 states have internal predecessors, (10448), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8825 states to 8825 states and 10452 transitions. [2021-05-02 23:25:41,685 INFO L78 Accepts]: Start accepts. Automaton has 8825 states and 10452 transitions. Word has length 102 [2021-05-02 23:25:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:41,686 INFO L480 AbstractCegarLoop]: Abstraction has 8825 states and 10452 transitions. [2021-05-02 23:25:41,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 8825 states and 10452 transitions. [2021-05-02 23:25:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:25:41,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:41,691 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:41,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:25:41,691 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2075765518, now seen corresponding path program 1 times [2021-05-02 23:25:41,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:41,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333935520] [2021-05-02 23:25:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:41,698 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:41,699 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:42,323 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 44 [2021-05-02 23:25:42,531 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 42 [2021-05-02 23:25:42,740 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 40 [2021-05-02 23:25:43,349 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 58 [2021-05-02 23:25:43,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:43,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:43,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333935520] [2021-05-02 23:25:43,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333935520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:43,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:43,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:25:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61182826] [2021-05-02 23:25:43,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:25:43,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:25:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:25:43,605 INFO L87 Difference]: Start difference. First operand 8825 states and 10452 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:53,928 INFO L93 Difference]: Finished difference Result 13955 states and 16368 transitions. [2021-05-02 23:25:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:25:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:25:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:53,944 INFO L225 Difference]: With dead ends: 13955 [2021-05-02 23:25:53,944 INFO L226 Difference]: Without dead ends: 10082 [2021-05-02 23:25:53,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1942.0ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:25:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10082 states. [2021-05-02 23:26:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10082 to 8478. [2021-05-02 23:26:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8478 states, 8473 states have (on average 1.175262598843385) internal successors, (9958), 8473 states have internal predecessors, (9958), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8478 states to 8478 states and 9962 transitions. [2021-05-02 23:26:01,252 INFO L78 Accepts]: Start accepts. Automaton has 8478 states and 9962 transitions. Word has length 102 [2021-05-02 23:26:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:01,252 INFO L480 AbstractCegarLoop]: Abstraction has 8478 states and 9962 transitions. [2021-05-02 23:26:01,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8478 states and 9962 transitions. [2021-05-02 23:26:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:26:01,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:01,258 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:01,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:26:01,258 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash 418588234, now seen corresponding path program 2 times [2021-05-02 23:26:01,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:01,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015143336] [2021-05-02 23:26:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:01,267 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:01,269 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:26:01,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:26:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:26:01,349 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:26:01,402 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:26:01,402 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:26:01,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:26:01,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:26:01 BoogieIcfgContainer [2021-05-02 23:26:01,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:26:01,433 INFO L168 Benchmark]: Toolchain (without parser) took 602900.86 ms. Allocated memory was 177.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 142.1 MB in the beginning and 993.4 MB in the end (delta: -851.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.94 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 159.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L168 Benchmark]: Boogie Preprocessor took 38.93 ms. Allocated memory is still 177.2 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L168 Benchmark]: RCFGBuilder took 359.32 ms. Allocated memory is still 177.2 MB. Free memory was 157.7 MB in the beginning and 138.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L168 Benchmark]: TraceAbstraction took 602238.77 ms. Allocated memory was 177.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 137.8 MB in the beginning and 993.4 MB in the end (delta: -855.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-05-02 23:26:01,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 177.2 MB. Free memory is still 158.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.94 ms. Allocated memory is still 177.2 MB. Free memory was 142.0 MB in the beginning and 159.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.93 ms. Allocated memory is still 177.2 MB. Free memory was 159.7 MB in the beginning and 157.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 359.32 ms. Allocated memory is still 177.2 MB. Free memory was 157.7 MB in the beginning and 138.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 602238.77 ms. Allocated memory was 177.2 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 137.8 MB in the beginning and 993.4 MB in the end (delta: -855.6 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] char string_entrada[10], vetor_vogais[]={'a','A','e','E','i','I','o','O','u','U','\0'}; [L27] unsigned int i,j,cont, tam_string, n_caracter; [L29] i=0 [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ [L29] COND FALSE !(i<10) [L32] string_entrada[10 -1]='\0' [L34] n_caracter = 0 [L35] EXPR string_entrada[n_caracter] [L35] COND TRUE string_entrada[n_caracter]!='\0' [L36] n_caracter++ [L35] EXPR string_entrada[n_caracter] [L35] COND FALSE !(string_entrada[n_caracter]!='\0') [L38] cont = 0 [L39] i=0 [L39] COND TRUE i