/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-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:56:27,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:56:27,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:56:27,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:56:27,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:56:27,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:56:27,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:56:27,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:56:27,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:56:27,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:56:27,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:56:27,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:56:27,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:56:27,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:56:27,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:56:27,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:56:27,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:56:27,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:56:27,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:56:27,923 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:56:27,923 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:56:28,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:56:28,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:56:28,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:56:28,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:56:28,261 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:56:28,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2021-05-06 11:56:28,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bec30dcc/0a59ad1353a04ef8a11aae13d50ab990/FLAGa1f1d2a37 [2021-05-06 11:56:28,777 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:56:28,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2021-05-06 11:56:28,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bec30dcc/0a59ad1353a04ef8a11aae13d50ab990/FLAGa1f1d2a37 [2021-05-06 11:56:28,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bec30dcc/0a59ad1353a04ef8a11aae13d50ab990 [2021-05-06 11:56:28,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:56:28,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:56:28,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:56:28,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:56:28,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:56:28,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:56:28" (1/1) ... [2021-05-06 11:56:28,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff638b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:28, skipping insertion in model container [2021-05-06 11:56:28,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:56:28" (1/1) ... [2021-05-06 11:56:28,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:56:28,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:56:28,979 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-crafted-1/mono-crafted_8.c[318,331] [2021-05-06 11:56:28,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:56:28,996 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:56:29,045 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-crafted-1/mono-crafted_8.c[318,331] [2021-05-06 11:56:29,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:56:29,062 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:56:29,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29 WrapperNode [2021-05-06 11:56:29,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:56:29,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:56:29,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:56:29,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:56:29,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... [2021-05-06 11:56:29,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:56:29,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:56:29,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:56:29,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:56:29,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:56:29,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:56:29,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:56:29,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:56:29,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:56:29,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:56:29,162 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:56:29,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:56:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:56:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:56:29,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:56:29,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:56:29,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:56:29,414 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:56:29,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:56:29 BoogieIcfgContainer [2021-05-06 11:56:29,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:56:29,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:56:29,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:56:29,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:56:29,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:56:28" (1/3) ... [2021-05-06 11:56:29,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2e8fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:56:29, skipping insertion in model container [2021-05-06 11:56:29,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:56:29" (2/3) ... [2021-05-06 11:56:29,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2e8fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:56:29, skipping insertion in model container [2021-05-06 11:56:29,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:56:29" (3/3) ... [2021-05-06 11:56:29,422 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2021-05-06 11:56:29,426 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:56:29,429 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:56:29,444 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:56:29,461 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:56:29,462 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:56:29,462 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:56:29,462 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:56:29,462 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:56:29,462 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:56:29,462 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:56:29,462 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:56:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:56:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:56:29,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:29,496 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:29,496 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2021-05-06 11:56:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:29,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30023453] [2021-05-06 11:56:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:29,590 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:56:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:29,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:29,803 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:29,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30023453] [2021-05-06 11:56:29,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [30023453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:29,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:29,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:56:29,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932397959] [2021-05-06 11:56:29,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:56:29,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:56:29,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:56:29,826 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:29,894 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-06 11:56:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:56:29,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:56:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:29,900 INFO L225 Difference]: With dead ends: 33 [2021-05-06 11:56:29,901 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 11:56:29,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:56:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 11:56:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 11:56:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 11:56:29,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 11:56:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:29,940 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 11:56:29,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 11:56:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:56:29,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:29,942 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:29,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:56:29,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:29,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2021-05-06 11:56:29,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:29,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774622281] [2021-05-06 11:56:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:29,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:56:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:30,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:30,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:30,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774622281] [2021-05-06 11:56:30,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [774622281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:30,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:30,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:56:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675719184] [2021-05-06 11:56:30,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:56:30,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:30,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:56:30,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:56:30,143 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:30,233 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-06 11:56:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:56:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:56:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:30,235 INFO L225 Difference]: With dead ends: 25 [2021-05-06 11:56:30,236 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:56:30,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:56:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:56:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-06 11:56:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-06 11:56:30,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-06 11:56:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:30,249 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-06 11:56:30,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-06 11:56:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:56:30,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:30,251 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:30,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:56:30,252 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2021-05-06 11:56:30,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:30,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702733496] [2021-05-06 11:56:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:30,313 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:30,319 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:30,339 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:34,369 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:56:38,399 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:56:40,669 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-06 11:56:40,700 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:40,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:40,756 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:40,792 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:40,804 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:56:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:41,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:41,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:41,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702733496] [2021-05-06 11:56:41,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702733496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:41,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:41,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:56:41,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418015576] [2021-05-06 11:56:41,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:56:41,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:56:41,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:56:41,218 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:41,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:41,453 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 11:56:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:56:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:56:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:41,455 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:56:41,455 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 11:56:41,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:56:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 11:56:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-05-06 11:56:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 11:56:41,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2021-05-06 11:56:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:41,464 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 11:56:41,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 11:56:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:56:41,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:41,465 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:41,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:56:41,465 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2021-05-06 11:56:41,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:41,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920920477] [2021-05-06 11:56:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:41,501 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:56:41,522 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:41,527 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:41,617 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:41,633 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:41,676 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:56:41,742 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:41,746 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:56:41,755 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:41,757 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:41,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:41,853 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:41,866 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:41,911 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:41,942 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:41,960 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:56:41,992 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:41,995 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:42,035 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:42,039 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:42,061 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:56:42,106 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:42,111 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:42,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:42,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:56:42,786 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:42,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920920477] [2021-05-06 11:56:42,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [920920477] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:42,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:42,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:56:42,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901384953] [2021-05-06 11:56:42,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:56:42,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:42,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:56:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:56:42,787 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2021-05-06 11:56:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:43,270 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-06 11:56:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:56:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 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 [2021-05-06 11:56:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:43,274 INFO L225 Difference]: With dead ends: 31 [2021-05-06 11:56:43,274 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 11:56:43,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:56:43,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 11:56:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-06 11:56:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-06 11:56:43,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-05-06 11:56:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:43,281 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-06 11:56:43,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2021-05-06 11:56:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-06 11:56:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 11:56:43,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:43,281 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:43,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:56:43,282 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542348, now seen corresponding path program 2 times [2021-05-06 11:56:43,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:43,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069100559] [2021-05-06 11:56:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:43,296 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:56:43,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,332 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,421 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:43,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:43,492 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:56:43,561 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:43,572 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:56:43,574 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,577 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,637 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:43,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:43,718 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:56:43,815 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:43,821 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:43,826 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:43,855 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,858 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,907 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:43,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:43,936 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:43,958 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:43,971 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:56:43,972 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:43,980 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:44,184 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:56:44,201 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:44,204 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:44,236 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:56:44,261 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:44,263 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:56:45,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:45,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069100559] [2021-05-06 11:56:45,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069100559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:45,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:45,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:56:45,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562654872] [2021-05-06 11:56:45,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:56:45,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:45,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:56:45,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:56:45,088 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:45,750 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 11:56:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:56:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 11:56:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:45,751 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:56:45,751 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:56:45,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1077.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:56:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:56:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:56:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 11:56:45,759 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-05-06 11:56:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:45,760 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 11:56:45,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 11:56:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 11:56:45,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:45,760 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:45,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:56:45,761 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1928408354, now seen corresponding path program 3 times [2021-05-06 11:56:45,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:45,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581312779] [2021-05-06 11:56:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:45,778 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:56:45,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:45,784 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:45,867 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:45,882 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:45,943 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:56:45,986 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:45,992 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:56:46,009 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,011 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,250 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:56:46,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:46,301 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:46,332 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:56:46,380 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:46,382 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:46,386 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:46,387 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,390 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,470 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:46,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:46,512 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:46,540 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:46,557 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:56:46,582 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,585 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:46,653 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:46,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:46,678 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:56:46,708 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:46,711 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:46,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:47,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:56:47,671 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581312779] [2021-05-06 11:56:47,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [581312779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:47,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:47,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 11:56:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326917028] [2021-05-06 11:56:47,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:56:47,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:56:47,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:56:47,673 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2021-05-06 11:56:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:48,436 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 11:56:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:56:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 [2021-05-06 11:56:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:48,437 INFO L225 Difference]: With dead ends: 37 [2021-05-06 11:56:48,437 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 11:56:48,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1276.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:56:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 11:56:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 11:56:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-06 11:56:48,445 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-05-06 11:56:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:48,445 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-06 11:56:48,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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) [2021-05-06 11:56:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-06 11:56:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:56:48,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:48,446 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:48,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:56:48,447 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1398461004, now seen corresponding path program 4 times [2021-05-06 11:56:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:48,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563045908] [2021-05-06 11:56:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:48,462 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:56:48,484 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,487 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:48,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:48,681 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:56:48,722 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:48,734 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:56:48,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,737 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,783 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:48,796 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:48,830 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:56:48,869 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:48,874 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:48,877 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:48,892 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,894 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:48,968 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:48,975 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:48,990 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:49,009 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:49,015 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:56:49,044 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:49,046 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:52,626 WARN L205 SmtUtils]: Spent 3.58 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:56:55,052 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:56:57,067 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:56:57,084 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:57,123 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:57,135 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:56:57,158 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:57,160 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:57,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:56:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:56:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:56:57,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:56:58,184 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:56:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563045908] [2021-05-06 11:56:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563045908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:56:58,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:56:58,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:56:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606051120] [2021-05-06 11:56:58,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:56:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:56:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:56:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:56:58,186 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:56:59,151 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 11:56:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:56:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 11:56:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:56:59,152 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:56:59,152 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:56:59,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1501.7ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:56:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:56:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-06 11:56:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 11:56:59,160 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2021-05-06 11:56:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:56:59,160 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 11:56:59,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:56:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 11:56:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 11:56:59,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:56:59,161 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:56:59,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:56:59,161 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:56:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:56:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2036737250, now seen corresponding path program 5 times [2021-05-06 11:56:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:56:59,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852612039] [2021-05-06 11:56:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:56:59,171 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:56:59,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,191 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:59,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:59,387 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:56:59,444 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:59,448 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:56:59,448 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,450 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:56:59,613 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:56:59,649 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:56:59,684 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:59,685 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:56:59,689 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:56:59,689 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,691 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,717 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:56:59,723 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:56:59,745 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:56:59,764 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:56:59,769 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:56:59,793 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:56:59,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:03,814 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:57:07,833 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:57:09,861 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:57:09,901 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:09,928 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:09,943 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:09,973 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:09,981 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:10,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:10,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:11,156 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:11,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852612039] [2021-05-06 11:57:11,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852612039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:11,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:11,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:57:11,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552563437] [2021-05-06 11:57:11,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:57:11,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:57:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:57:11,158 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 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) [2021-05-06 11:57:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:57:12,311 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-05-06 11:57:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:57:12,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 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 [2021-05-06 11:57:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:57:12,313 INFO L225 Difference]: With dead ends: 43 [2021-05-06 11:57:12,313 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 11:57:12,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1774.5ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:57:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 11:57:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 11:57:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2021-05-06 11:57:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-06 11:57:12,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2021-05-06 11:57:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:57:12,322 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-06 11:57:12,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 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) [2021-05-06 11:57:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-06 11:57:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:57:12,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:57:12,323 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:57:12,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 11:57:12,323 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:57:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:57:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1190804852, now seen corresponding path program 6 times [2021-05-06 11:57:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:57:12,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929717637] [2021-05-06 11:57:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:57:12,338 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:57:12,339 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,405 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:12,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:12,496 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:57:12,552 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:12,555 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:57:12,567 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,656 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:12,665 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:12,693 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:57:12,725 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:12,727 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:12,730 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:57:12,751 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,757 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,814 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:12,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:12,832 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:57:12,852 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:12,857 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:57:12,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:12,982 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:12,985 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:12,997 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:13,018 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:13,019 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:13,214 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-05-06 11:57:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:14,445 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929717637] [2021-05-06 11:57:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929717637] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:14,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:14,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:57:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14383982] [2021-05-06 11:57:14,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:57:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:57:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:57:14,448 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:57:15,905 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 11:57:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 11:57:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 11:57:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:57:15,906 INFO L225 Difference]: With dead ends: 46 [2021-05-06 11:57:15,906 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:57:15,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2279.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:57:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:57:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 11:57:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 11:57:15,913 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2021-05-06 11:57:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:57:15,913 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 11:57:15,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 11:57:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 11:57:15,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:57:15,914 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:57:15,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 11:57:15,915 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:57:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:57:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1464709982, now seen corresponding path program 7 times [2021-05-06 11:57:15,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:57:15,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112288453] [2021-05-06 11:57:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:57:15,925 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:57:15,926 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:15,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,036 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:16,049 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:16,111 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:57:16,170 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:16,173 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:57:16,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,178 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,269 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:16,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:16,347 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:57:16,383 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:16,384 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:16,387 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:57:16,399 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,401 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,447 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:16,455 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:16,467 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:57:16,485 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:16,495 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:57:16,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,521 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:16,553 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:16,556 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:16,573 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:16,602 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:16,607 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:16,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,604 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-06 11:57:17,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:17,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,117 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-05-06 11:57:19,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:19,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:20,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:20,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:20,988 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-05-06 11:57:20,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:21,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:21,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:21,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:21,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:22,269 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-05-06 11:57:22,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:22,550 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112288453] [2021-05-06 11:57:22,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [112288453] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:22,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:22,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 11:57:22,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478396166] [2021-05-06 11:57:22,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 11:57:22,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:22,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 11:57:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:57:22,552 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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) [2021-05-06 11:57:23,497 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2021-05-06 11:57:25,300 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-06 11:57:25,807 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-06 11:57:26,792 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 11:57:27,131 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-06 11:57:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:57:27,665 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-05-06 11:57:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:57:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 [2021-05-06 11:57:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:57:27,667 INFO L225 Difference]: With dead ends: 49 [2021-05-06 11:57:27,667 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 11:57:27,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 9487.2ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:57:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 11:57:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-06 11:57:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 11:57:27,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2021-05-06 11:57:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:57:27,698 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 11:57:27,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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) [2021-05-06 11:57:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 11:57:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 11:57:27,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:57:27,699 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:57:27,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 11:57:27,699 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:57:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:57:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -934575412, now seen corresponding path program 8 times [2021-05-06 11:57:27,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:57:27,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903332804] [2021-05-06 11:57:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:57:27,730 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:57:27,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:27,770 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:27,851 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:27,903 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:28,261 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-06 11:57:28,264 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:57:28,328 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:28,340 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:57:28,372 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,374 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,540 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:57:28,603 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:28,625 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:28,659 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:57:28,714 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:28,716 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:28,720 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:57:28,739 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,741 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:28,831 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:28,850 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:57:28,879 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:28,905 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:57:28,927 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,928 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:28,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:28,993 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:29,011 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:29,060 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:29,062 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:29,533 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2021-05-06 11:57:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:29,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:29,901 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 21 [2021-05-06 11:57:31,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903332804] [2021-05-06 11:57:31,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [903332804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:31,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:31,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 11:57:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071190707] [2021-05-06 11:57:31,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 11:57:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 11:57:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:57:31,758 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:57:33,657 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-06 11:57:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:57:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 11:57:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:57:33,658 INFO L225 Difference]: With dead ends: 52 [2021-05-06 11:57:33,658 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 11:57:33,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3369.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:57:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 11:57:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 11:57:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-05-06 11:57:33,671 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-05-06 11:57:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:57:33,672 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-05-06 11:57:33,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-05-06 11:57:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 11:57:33,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:57:33,672 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:57:33,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 11:57:33,673 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:57:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:57:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -290347934, now seen corresponding path program 9 times [2021-05-06 11:57:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:57:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771682457] [2021-05-06 11:57:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:57:33,684 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:57:33,702 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:33,704 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:33,798 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:33,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:33,856 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:57:33,907 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:33,910 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:57:33,927 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:33,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:33,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:34,000 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:34,024 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:57:34,056 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:34,057 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:34,059 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:57:34,073 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:34,074 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:34,119 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:34,125 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:34,137 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:57:34,155 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:34,159 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:57:34,160 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:34,163 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:38,182 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:57:40,802 WARN L205 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:57:42,824 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:57:42,842 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:42,848 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:42,876 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:42,908 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:42,910 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:43,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:43,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:44,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:44,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771682457] [2021-05-06 11:57:44,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771682457] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:44,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:44,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 11:57:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869144323] [2021-05-06 11:57:44,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 11:57:44,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 11:57:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:57:44,984 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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) [2021-05-06 11:57:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:57:47,339 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-06 11:57:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:57:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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 41 [2021-05-06 11:57:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:57:47,340 INFO L225 Difference]: With dead ends: 55 [2021-05-06 11:57:47,340 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 11:57:47,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3424.3ms TimeCoverageRelationStatistics Valid=202, Invalid=2348, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:57:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 11:57:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 11:57:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:57:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-05-06 11:57:47,358 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2021-05-06 11:57:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:57:47,359 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-05-06 11:57:47,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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) [2021-05-06 11:57:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-05-06 11:57:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 11:57:47,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:57:47,359 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:57:47,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 11:57:47,360 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:57:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:57:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1976570636, now seen corresponding path program 10 times [2021-05-06 11:57:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:57:47,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6173335] [2021-05-06 11:57:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:57:47,380 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:57:47,382 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,469 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:47,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:47,568 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:57:47,635 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:47,639 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:57:47,640 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,641 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,749 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:57:47,765 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:57:47,806 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:57:47,844 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:47,845 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:47,847 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:57:47,848 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,850 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:47,926 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:47,933 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:47,985 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:57:48,009 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:48,015 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:57:48,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:48,038 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:57:50,548 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:57:52,560 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:57:55,002 WARN L205 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:57:55,029 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:57:55,048 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:57:55,062 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:57:55,084 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:57:55,085 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:57:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:55,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:57:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:57:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:57:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:57:57,441 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:57:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6173335] [2021-05-06 11:57:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [6173335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:57:57,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:57:57,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 11:57:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628132858] [2021-05-06 11:57:57,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 11:57:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:57:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 11:57:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:57:57,442 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:58:00,011 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-06 11:58:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 11:58:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 11:58:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:58:00,012 INFO L225 Difference]: With dead ends: 58 [2021-05-06 11:58:00,012 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 11:58:00,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3816.6ms TimeCoverageRelationStatistics Valid=218, Invalid=2752, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:58:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 11:58:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-06 11:58:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-05-06 11:58:00,026 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2021-05-06 11:58:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:58:00,026 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-05-06 11:58:00,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-05-06 11:58:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 11:58:00,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:58:00,027 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:58:00,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 11:58:00,027 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:58:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:58:00,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1681927202, now seen corresponding path program 11 times [2021-05-06 11:58:00,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:58:00,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651017223] [2021-05-06 11:58:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:58:00,036 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:58:00,068 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,070 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:00,213 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:00,249 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:58:00,307 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:00,312 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:58:00,330 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,331 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:00,465 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:00,487 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:58:00,513 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:00,514 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:00,516 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:58:00,527 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,529 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,574 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:00,580 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:00,593 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:58:00,618 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:00,623 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:58:00,623 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:00,664 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:00,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:00,694 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:58:00,715 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:00,717 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:00,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:58:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:58:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:03,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:58:03,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651017223] [2021-05-06 11:58:03,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [651017223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:58:03,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:58:03,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 11:58:03,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482033221] [2021-05-06 11:58:03,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 11:58:03,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:58:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 11:58:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:58:03,366 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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) [2021-05-06 11:58:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:58:06,294 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 11:58:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 11:58:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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 47 [2021-05-06 11:58:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:58:06,295 INFO L225 Difference]: With dead ends: 61 [2021-05-06 11:58:06,295 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 11:58:06,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 4288.0ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:58:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 11:58:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-06 11:58:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-05-06 11:58:06,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2021-05-06 11:58:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:58:06,307 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-05-06 11:58:06,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 29 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) [2021-05-06 11:58:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-05-06 11:58:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 11:58:06,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:58:06,308 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:58:06,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 11:58:06,308 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:58:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:58:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1422429364, now seen corresponding path program 12 times [2021-05-06 11:58:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:58:06,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577837717] [2021-05-06 11:58:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:58:06,319 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:58:06,320 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,321 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,360 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:06,375 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:06,492 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:58:06,542 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:06,548 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:58:06,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,562 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,654 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:06,671 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:06,701 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:58:06,733 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:06,735 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:06,738 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:58:06,751 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,753 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,794 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:06,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:06,814 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:58:06,835 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:06,839 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:58:06,840 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:06,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:09,243 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:58:09,258 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:09,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:09,288 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:58:09,312 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:09,313 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:58:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:58:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:12,095 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:58:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577837717] [2021-05-06 11:58:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [577837717] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:58:12,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:58:12,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 11:58:12,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753060647] [2021-05-06 11:58:12,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 11:58:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:58:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 11:58:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:58:12,097 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:58:15,418 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-05-06 11:58:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 11:58:15,419 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 11:58:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:58:15,419 INFO L225 Difference]: With dead ends: 64 [2021-05-06 11:58:15,419 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 11:58:15,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 4757.2ms TimeCoverageRelationStatistics Valid=251, Invalid=3655, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:58:15,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 11:58:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 11:58:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 11:58:15,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 11:58:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:58:15,437 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 11:58:15,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.4375) internal successors, (46), 31 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:58:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 11:58:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 11:58:15,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:58:15,438 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:58:15,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 11:58:15,438 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:58:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:58:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash 221897698, now seen corresponding path program 13 times [2021-05-06 11:58:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:58:15,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971476683] [2021-05-06 11:58:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:58:15,449 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:58:15,450 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,452 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,503 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:15,518 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:15,557 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:58:15,622 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:15,627 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:58:15,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,629 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,761 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:58:15,782 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:58:15,820 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:58:15,897 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:15,898 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:15,900 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:58:15,901 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,909 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:15,941 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:15,963 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:58:15,983 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:15,988 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:58:15,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:15,990 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:58:16,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:58:16,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:58:16,125 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:58:16,147 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:58:16,148 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:58:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:16,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:58:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:58:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:58:16,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:16,522 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-05-06 11:58:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:16,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:16,811 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-05-06 11:58:16,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:17,374 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 11:58:17,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:17,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:17,805 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-06 11:58:17,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:18,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:18,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:18,988 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:19,285 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:19,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:20,240 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:20,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:20,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:21,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:22,283 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:22,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:22,719 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:22,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:24,510 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:25,206 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:25,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:25,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:26,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:27,542 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:27,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:28,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:29,305 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:29,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:29,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:30,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:32,301 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:33,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:34,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:34,802 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:34,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:36,774 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:36,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:37,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:39,335 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:40,486 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:41,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:42,782 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:42,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:43,747 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:43,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:46,464 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:48,097 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:49,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:50,988 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 11:58:50,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:58:52,616 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 11:58:52,617 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:58:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971476683] [2021-05-06 11:58:52,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [971476683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:58:52,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:58:52,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 11:58:52,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121542130] [2021-05-06 11:58:52,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 11:58:52,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:58:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 11:58:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:58:52,618 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 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) [2021-05-06 11:58:53,223 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 11:58:54,011 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 11:58:54,838 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-06 11:58:56,017 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 114 [2021-05-06 11:58:57,090 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:58:58,350 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:58:59,226 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:00,170 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:00,927 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:01,637 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:02,179 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:03,061 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:04,200 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:05,672 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:06,277 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:07,871 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:08,632 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:09,779 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:10,640 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:12,479 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:14,359 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:15,401 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:16,066 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:17,273 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:18,631 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:19,801 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-06 11:59:20,875 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-06 11:59:21,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:59:21,262 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-05-06 11:59:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 11:59:21,262 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 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 53 [2021-05-06 11:59:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:59:21,263 INFO L225 Difference]: With dead ends: 67 [2021-05-06 11:59:21,263 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 11:59:21,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 60119.9ms TimeCoverageRelationStatistics Valid=266, Invalid=4156, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:59:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 11:59:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 11:59:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:59:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-05-06 11:59:21,281 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2021-05-06 11:59:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:59:21,281 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-05-06 11:59:21,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 33 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) [2021-05-06 11:59:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-05-06 11:59:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 11:59:21,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:59:21,282 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:59:21,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 11:59:21,283 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:59:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:59:21,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2027576436, now seen corresponding path program 14 times [2021-05-06 11:59:21,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:59:21,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822291445] [2021-05-06 11:59:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:59:21,299 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:59:21,320 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:21,322 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,053 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:59:22,080 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:59:22,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:59:22,136 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:59:22,179 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:22,183 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:59:22,183 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,185 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,226 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:59:22,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:59:22,304 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:59:22,341 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:22,342 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:59:22,344 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:59:22,344 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:59:22,376 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:59:22,401 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:59:22,423 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:22,429 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:59:22,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:22,485 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:59:22,488 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:59:22,501 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:59:22,524 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:22,526 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:59:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:59:22,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:59:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:59:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:59:22,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:26,028 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:59:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822291445] [2021-05-06 11:59:26,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822291445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:59:26,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:59:26,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 11:59:26,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156742459] [2021-05-06 11:59:26,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 11:59:26,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:59:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 11:59:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:59:26,029 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:59:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:59:30,011 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-05-06 11:59:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 11:59:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 11:59:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:59:30,012 INFO L225 Difference]: With dead ends: 70 [2021-05-06 11:59:30,012 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 11:59:30,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 5857.1ms TimeCoverageRelationStatistics Valid=282, Invalid=4688, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:59:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 11:59:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 11:59:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:59:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-05-06 11:59:30,031 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2021-05-06 11:59:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:59:30,031 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-05-06 11:59:30,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 35 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:59:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-05-06 11:59:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 11:59:30,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:59:30,032 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:59:30,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 11:59:30,032 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:59:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:59:30,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1736782942, now seen corresponding path program 15 times [2021-05-06 11:59:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:59:30,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031448770] [2021-05-06 11:59:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:59:30,041 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 11:59:30,059 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,061 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,155 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:59:30,168 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:59:30,200 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 11:59:30,242 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:30,250 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:59:30,251 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,252 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,347 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:59:30,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:59:30,441 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:59:30,485 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:30,486 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:59:30,489 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:59:30,490 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,491 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,536 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:59:30,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:59:30,571 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:59:30,591 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:30,596 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 11:59:30,597 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:30,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:59:32,609 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:59:36,621 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:59:39,202 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:59:39,217 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:59:39,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:59:39,255 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 11:59:39,279 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:59:39,280 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:59:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:59:39,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:59:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:59:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:59:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:39,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:40,845 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-06 11:59:40,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:40,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:41,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:41,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:41,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:42,029 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 11:59:42,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:44,549 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:45,451 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 11:59:45,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:45,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:45,988 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:45,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:46,543 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 11:59:46,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:47,117 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:47,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:47,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:48,161 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:48,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:49,424 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:49,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:49,829 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 11:59:49,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:52,524 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:52,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:57,509 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:57,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:57,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:59:59,255 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 11:59:59,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:00,143 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 12:00:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:00,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:01,867 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 12:00:01,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:02,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:02,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:03,440 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 12:00:03,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:04,189 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 12:00:04,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:04,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:05,772 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 12:00:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:07,412 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 12:00:07,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:07,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:09,498 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-06 12:00:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:10,325 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-06 12:00:10,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:00:10,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031448770] [2021-05-06 12:00:10,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031448770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:00:10,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:00:10,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 12:00:10,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328903890] [2021-05-06 12:00:10,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 12:00:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:00:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 12:00:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 12:00:10,328 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 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) [2021-05-06 12:00:12,224 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 100 [2021-05-06 12:00:14,060 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:14,503 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:16,036 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:16,702 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:18,546 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:19,586 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:20,954 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:22,340 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:23,040 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:23,922 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:26,155 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:26,610 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:28,003 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:28,647 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-05-06 12:00:30,557 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-06 12:00:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:00:30,947 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-05-06 12:00:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 12:00:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 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 59 [2021-05-06 12:00:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:00:30,948 INFO L225 Difference]: With dead ends: 73 [2021-05-06 12:00:30,948 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 12:00:30,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 16 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 47072.2ms TimeCoverageRelationStatistics Valid=298, Invalid=5252, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 12:00:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 12:00:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-05-06 12:00:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:00:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-05-06 12:00:30,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2021-05-06 12:00:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:00:30,973 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-05-06 12:00:30,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 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) [2021-05-06 12:00:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-05-06 12:00:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 12:00:30,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:00:30,974 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:00:30,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 12:00:30,974 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:00:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:00:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1656839220, now seen corresponding path program 16 times [2021-05-06 12:00:30,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:00:30,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979055250] [2021-05-06 12:00:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:00:30,989 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 12:00:30,990 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:30,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,076 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:00:31,086 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:00:31,140 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 12:00:31,196 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:00:31,199 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 12:00:31,213 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,215 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,259 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:00:31,274 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:00:31,339 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 12:00:31,367 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:00:31,368 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:00:31,370 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 12:00:31,371 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,372 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,492 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:00:31,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:00:31,532 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 12:00:31,562 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:00:31,568 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 12:00:31,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,570 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:00:31,602 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:00:31,607 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:00:31,657 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 12:00:31,697 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:00:31,698 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:00:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:00:31,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:00:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:00:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:00:31,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,574 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-05-06 12:00:32,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:33,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:33,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:33,574 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:33,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:34,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:34,522 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:34,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:34,979 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:34,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:35,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:42,280 WARN L205 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:42,618 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:44,980 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:44,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:46,217 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:46,932 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:46,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:47,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:48,701 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:49,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:50,558 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:51,075 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:51,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:51,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:53,016 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:53,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:53,701 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:55,858 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:56,887 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:00:56,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:00:58,283 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:00:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:01,065 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:01,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:01,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:02,686 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:01:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:04,609 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:04,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:05,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:06,056 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:01:06,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:10,413 WARN L205 SmtUtils]: Spent 3.79 s on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:10,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:11,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:12,370 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:01:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:13,299 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:16,724 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:01:16,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:17,921 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:18,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:23,595 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-06 12:01:23,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:01:24,585 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-06 12:01:24,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:01:24,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979055250] [2021-05-06 12:01:24,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [979055250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:01:24,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:01:24,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 12:01:24,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497135542] [2021-05-06 12:01:24,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 12:01:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:01:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 12:01:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 12:01:24,588 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 41 states, 40 states have (on average 1.45) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:01:25,804 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-06 12:01:27,458 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-05-06 12:01:28,433 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:29,200 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:29,757 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:30,729 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:31,799 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:33,941 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:34,519 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:35,350 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:35,956 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:38,452 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:39,279 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:40,096 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:40,665 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:43,502 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:44,718 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:45,372 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:45,876 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:46,695 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:47,363 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:47,952 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:48,977 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:49,783 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:50,457 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:51,750 WARN L205 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:52,322 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:54,030 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:01:55,368 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:01:58,017 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 112 [2021-05-06 12:02:00,240 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:02:03,779 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 113 [2021-05-06 12:02:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:02:04,135 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-05-06 12:02:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 12:02:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.45) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 12:02:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:02:04,136 INFO L225 Difference]: With dead ends: 76 [2021-05-06 12:02:04,137 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 12:02:04,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 17 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 86900.6ms TimeCoverageRelationStatistics Valid=314, Invalid=5848, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 12:02:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 12:02:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-06 12:02:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:02:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-05-06 12:02:04,177 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2021-05-06 12:02:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:02:04,177 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-05-06 12:02:04,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.45) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:02:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-05-06 12:02:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 12:02:04,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:02:04,178 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:02:04,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 12:02:04,178 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:02:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:02:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 534700898, now seen corresponding path program 17 times [2021-05-06 12:02:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:02:04,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476528128] [2021-05-06 12:02:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:02:04,193 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 12:02:04,194 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:04,196 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:06,309 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 12:02:06,540 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 12:02:06,599 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:02:06,611 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:02:06,674 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 12:02:06,729 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:06,732 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 12:02:06,748 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:06,759 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:06,841 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:02:06,866 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:02:06,898 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 12:02:06,942 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:06,943 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:02:06,946 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 12:02:06,947 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:06,949 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:07,201 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 12:02:07,230 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:02:07,238 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:02:07,271 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 12:02:07,294 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:07,303 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 12:02:07,322 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:07,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:07,350 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:02:07,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:02:07,371 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 12:02:07,398 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:07,409 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:02:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:02:07,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:02:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:02:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:02:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:12,259 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:02:12,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476528128] [2021-05-06 12:02:12,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [476528128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:02:12,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:02:12,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 12:02:12,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440287849] [2021-05-06 12:02:12,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 12:02:12,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:02:12,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 12:02:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 12:02:12,260 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 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) [2021-05-06 12:02:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:02:18,216 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-05-06 12:02:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 12:02:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 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 65 [2021-05-06 12:02:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:02:18,217 INFO L225 Difference]: With dead ends: 79 [2021-05-06 12:02:18,217 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 12:02:18,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 18 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 8017.6ms TimeCoverageRelationStatistics Valid=330, Invalid=6476, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 12:02:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 12:02:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-05-06 12:02:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 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) [2021-05-06 12:02:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-05-06 12:02:18,252 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2021-05-06 12:02:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:02:18,253 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-05-06 12:02:18,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 41 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) [2021-05-06 12:02:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-05-06 12:02:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 12:02:18,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:02:18,253 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:02:18,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-06 12:02:18,253 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:02:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:02:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash 908489740, now seen corresponding path program 18 times [2021-05-06 12:02:18,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:02:18,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784971968] [2021-05-06 12:02:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:02:18,271 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size [2021-05-06 12:02:18,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:18,274 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:18,449 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 12:02:18,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:02:18,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:02:18,570 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.8 percent of original size 89 [2021-05-06 12:02:18,633 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:18,636 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 12:02:18,637 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:18,638 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:18,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 12:02:18,709 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 12:02:18,920 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-06 12:02:18,979 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 12:02:19,020 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:19,021 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:02:19,023 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 12:02:19,037 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:19,038 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:19,081 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:02:19,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:02:19,103 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 12:02:19,124 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:19,129 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size [2021-05-06 12:02:19,157 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:19,158 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 12:02:21,173 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 12:02:25,189 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 12:02:27,690 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 12:02:27,702 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 12:02:27,706 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 12:02:27,721 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 90.3 percent of original size 84 [2021-05-06 12:02:27,746 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 12:02:27,747 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 12:02:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:02:27,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:02:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:02:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:02:27,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:28,076 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-05-06 12:02:28,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:28,776 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-05-06 12:02:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:28,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:29,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:29,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:29,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:29,978 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-06 12:02:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:30,210 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 12:02:30,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:30,589 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-05-06 12:02:30,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:30,942 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 12:02:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:31,261 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-05-06 12:02:31,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:31,636 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-06 12:02:31,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:32,027 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-06 12:02:32,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:32,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:33,067 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-05-06 12:02:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:33,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:33,595 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 12:02:33,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:34,218 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-06 12:02:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:34,908 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-05-06 12:02:34,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:35,471 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-06 12:02:35,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:36,583 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-05-06 12:02:36,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:37,343 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-05-06 12:02:37,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:37,790 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-06 12:02:37,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:38,707 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-06 12:02:38,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:39,706 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-06 12:02:39,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:40,819 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2021-05-06 12:02:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:41,802 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2021-05-06 12:02:41,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:42,471 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-05-06 12:02:42,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:43,589 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-05-06 12:02:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:44,300 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-06 12:02:44,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:44,963 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-06 12:02:44,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 12:02:44,989 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:02:44,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784971968] [2021-05-06 12:02:44,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [784971968] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:02:44,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:02:44,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 12:02:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185960870] [2021-05-06 12:02:44,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 12:02:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:02:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 12:02:44,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1044, Unknown=481, NotChecked=0, Total=1640 [2021-05-06 12:02:44,990 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:02:46,278 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-06 12:02:46,975 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-06 12:02:47,621 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-06 12:02:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:02:47,753 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-05-06 12:02:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 12:02:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 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 68 [2021-05-06 12:02:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:02:47,753 INFO L225 Difference]: With dead ends: 71 [2021-05-06 12:02:47,753 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 12:02:47,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 18788.8ms TimeCoverageRelationStatistics Valid=159, Invalid=1564, Unknown=533, NotChecked=0, Total=2256 [2021-05-06 12:02:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 12:02:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 12:02:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 12:02:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 12:02:47,755 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-06 12:02:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:02:47,755 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 12:02:47,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:02:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 12:02:47,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 12:02:47,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-06 12:02:47,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 12:02:48,237 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 575 [2021-05-06 12:02:49,605 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 463 DAG size of output: 200 [2021-05-06 12:02:50,585 WARN L205 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 96 [2021-05-06 12:02:55,742 WARN L205 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 560 DAG size of output: 146 [2021-05-06 12:02:55,745 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 12:02:55,745 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 12:02:55,746 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 6 18) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 6 18) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-05-06 12:02:55,746 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 6 18) the Hoare annotation is: true [2021-05-06 12:02:55,747 INFO L194 CegarLoopUtils]: At program point L12(lines 12 13) the Hoare annotation is: (let ((.cse1 (<= (+ main_~z~0 5000000) main_~y~0)) (.cse3 (<= 5000000 main_~z~0)) (.cse0 (mod (+ main_~x~0 4294967295) 4294967296)) (.cse2 (<= main_~y~0 10000000))) (or (and (< .cse0 5000000) .cse1 .cse2 (or (and (< 1 main_~x~0) (<= (div (+ (* main_~x~0 (- 1)) 5000001) (- 4294967296)) 0)) (= main_~x~0 1)) .cse3) (and .cse1 .cse2 (= main_~x~0 0) .cse3) (and (<= 5000000 .cse0) (< (mod main_~x~0 4294967296) (mod main_~y~0 4294967296)) (<= 4999999 main_~z~0) (< (mod (+ main_~x~0 4294967294) 4294967296) 5000000) .cse2 (<= (+ main_~z~0 5000001) main_~y~0) (exists ((v_main_~x~0_106 Int) (v_main_~z~0_59 Int) (|v_main_#t~post7_36| Int) (|v_main_#t~post7_35| Int) (|v_main_#t~post8_74| Int) (|v_main_#t~post8_73| Int)) (and (let ((.cse10 (+ v_main_~x~0_106 2))) (let ((.cse4 (= |v_main_#t~post7_36| |v_main_#t~post7_35|)) (.cse5 (= |v_main_#t~post8_74| |v_main_#t~post8_73|)) (.cse6 (= main_~x~0 .cse10)) (.cse7 (= v_main_~z~0_59 (+ main_~z~0 1))) (.cse8 (mod main_~y~0 4294967296)) (.cse9 (mod v_main_~x~0_106 4294967296))) (or (and .cse4 .cse5 .cse6 .cse7) (and (or (<= .cse8 .cse9) (< .cse9 5000000)) .cse4 .cse5 .cse6 .cse7) (and (< .cse9 .cse8) (<= (div (+ .cse8 (* main_~x~0 (- 1)) 2) (- 4294967296)) (+ (div (+ v_main_~x~0_106 (- 4294967295)) 4294967296) 1)) (< .cse10 main_~x~0) (= (+ v_main_~x~0_106 v_main_~z~0_59 1) (+ main_~x~0 main_~z~0)) (<= 5000000 .cse9))))) (let ((.cse12 (div main_~y~0 4294967296))) (let ((.cse11 (<= .cse12 (div v_main_~x~0_106 4294967296)))) (or (and (<= (+ v_main_~x~0_106 5000000) main_~y~0) .cse11) (and (< 0 (+ .cse12 1)) (let ((.cse13 (* 4294967296 (div v_main_~z~0_59 4294967296)))) (or (<= (+ v_main_~x~0_106 v_main_~z~0_59 (* 4294967296 .cse12)) (+ .cse13 main_~y~0)) (<= v_main_~z~0_59 .cse13))) .cse11)))))) (exists ((|v_main_#t~post7_78| Int) (|v_main_#t~post7_77| Int) (|v_main_#t~post8_155| Int) (|v_main_#t~post8_156| Int) (v_main_~z~0_183 Int) (v_main_~x~0_278 Int)) (and (let ((.cse15 (+ main_~z~0 1))) (let ((.cse17 (= main_~x~0 (+ v_main_~x~0_278 2))) (.cse14 (mod main_~y~0 4294967296)) (.cse16 (mod v_main_~x~0_278 4294967296)) (.cse18 (= |v_main_#t~post7_78| |v_main_#t~post7_77|)) (.cse19 (= v_main_~z~0_183 .cse15)) (.cse20 (= |v_main_#t~post8_156| |v_main_#t~post8_155|))) (or (and (<= (div (+ .cse14 main_~z~0 (* v_main_~z~0_183 (- 1)) (* v_main_~x~0_278 (- 1)) 1) (- 4294967296)) (+ (div (+ v_main_~x~0_278 (- 4294967295)) 4294967296) 1)) (< .cse15 v_main_~z~0_183) (= (+ v_main_~z~0_183 v_main_~x~0_278 1) (+ main_~x~0 main_~z~0)) (< .cse16 .cse14) (<= 5000000 .cse16)) (and .cse17 .cse18 .cse19 .cse20) (and .cse17 (or (< .cse16 5000000) (<= .cse14 .cse16)) .cse18 .cse19 .cse20)))) (let ((.cse22 (div main_~y~0 4294967296))) (let ((.cse21 (<= .cse22 (div v_main_~x~0_278 4294967296)))) (or (and (<= (+ v_main_~x~0_278 5000000) main_~y~0) .cse21) (and (let ((.cse23 (* 4294967296 (div v_main_~z~0_183 4294967296)))) (or (<= (+ v_main_~z~0_183 v_main_~x~0_278 (* 4294967296 .cse22)) (+ main_~y~0 .cse23)) (<= v_main_~z~0_183 .cse23))) .cse21)))))) (exists ((|v_main_#t~post8_135| Int) (v_main_~x~0_229 Int) (|v_main_#t~post7_67| Int) (|v_main_#t~post7_66| Int) (|v_main_#t~post8_134| Int) (v_main_~z~0_146 Int)) (and (let ((.cse27 (div main_~y~0 4294967296))) (let ((.cse26 (div v_main_~x~0_229 4294967296)) (.cse24 (* 4294967296 .cse27))) (or (let ((.cse25 (div (+ (* v_main_~x~0_229 (- 1)) main_~y~0 (* .cse27 (- 4294967296))) (- 4294967296)))) (and (<= (+ v_main_~x~0_229 v_main_~z~0_146 .cse24) (+ (* 4294967296 (div v_main_~z~0_146 4294967296)) main_~y~0 (* 4294967296 .cse25))) (<= .cse25 0) (< 0 (+ .cse26 1)))) (and (<= (+ v_main_~x~0_229 4999999) main_~y~0) (<= .cse27 .cse26)) (and (<= 0 v_main_~x~0_229) (<= (+ v_main_~x~0_229 .cse24 10000000) main_~y~0))))) (let ((.cse30 (+ v_main_~x~0_229 2))) (let ((.cse28 (mod main_~y~0 4294967296)) (.cse29 (mod v_main_~x~0_229 4294967296)) (.cse31 (= |v_main_#t~post8_135| |v_main_#t~post8_134|)) (.cse32 (= .cse30 main_~x~0)) (.cse33 (= v_main_~z~0_146 (+ main_~z~0 1))) (.cse34 (= |v_main_#t~post7_67| |v_main_#t~post7_66|))) (or (and (= (+ v_main_~x~0_229 v_main_~z~0_146 1) (+ main_~x~0 main_~z~0)) (<= (div (+ .cse28 (* main_~x~0 (- 1)) 2) (- 4294967296)) (+ (div (+ v_main_~x~0_229 (- 4294967295)) 4294967296) 1)) (< .cse29 .cse28) (<= 5000000 .cse29) (< .cse30 main_~x~0)) (and .cse31 .cse32 .cse33 .cse34 (or (< .cse29 5000000) (<= .cse28 .cse29))) (and .cse31 .cse32 .cse33 .cse34))))))))) [2021-05-06 12:02:55,747 INFO L194 CegarLoopUtils]: At program point L12-2(lines 12 13) the Hoare annotation is: (let ((.cse0 (<= (div (+ (* main_~x~0 (- 1)) 5000001) (- 4294967296)) 0))) (or (and (<= main_~y~0 (+ main_~z~0 5000000)) (<= 10000000 main_~y~0) (< (mod main_~x~0 4294967296) 5000000) (or (and (< 1 main_~x~0) .cse0) (= main_~x~0 1)) (<= (+ main_~y~0 main_~z~0) 15000000) (exists ((v_main_~x~0_359 Int) (v_main_~z~0_246 Int) (|v_main_#t~post8_187| Int) (|v_main_#t~post7_94| Int)) (and (let ((.cse2 (div main_~y~0 4294967296)) (.cse1 (div v_main_~x~0_359 4294967296))) (or (let ((.cse3 (div (+ (* v_main_~x~0_359 (- 1)) main_~y~0 (* .cse2 (- 4294967296))) (- 4294967296)))) (and (< 0 (+ .cse1 1)) (<= (+ v_main_~x~0_359 v_main_~z~0_246 (* 4294967296 .cse2)) (+ main_~y~0 (* 4294967296 (div v_main_~z~0_246 4294967296)) (* 4294967296 .cse3))) (<= .cse3 0))) (and (<= (+ v_main_~x~0_359 5000000) main_~y~0) (<= .cse2 .cse1)))) (let ((.cse6 (= v_main_~x~0_359 main_~x~0)) (.cse5 (mod main_~y~0 4294967296)) (.cse4 (mod v_main_~x~0_359 4294967296)) (.cse7 (= main_~z~0 v_main_~z~0_246)) (.cse8 (= |main_#t~post7| |v_main_#t~post7_94|)) (.cse9 (= |main_#t~post8| |v_main_#t~post8_187|))) (or (and (<= 5000000 .cse4) (< .cse4 .cse5) (< v_main_~x~0_359 main_~x~0) (= (+ v_main_~x~0_359 v_main_~z~0_246) (+ main_~x~0 main_~z~0)) (<= (div (+ .cse5 (* main_~x~0 (- 1))) (- 4294967296)) (+ (div (+ v_main_~x~0_359 (- 4294967295)) 4294967296) 1))) (and .cse6 .cse7 .cse8 .cse9) (and .cse6 (or (<= .cse5 .cse4) (< .cse4 5000000)) .cse7 .cse8 .cse9)))))) (and (exists ((v_main_~x~0_106 Int) (v_main_~z~0_59 Int) (|v_main_#t~post7_36| Int) (|v_main_#t~post7_35| Int) (|v_main_#t~post8_74| Int) (|v_main_#t~post8_73| Int)) (and (let ((.cse16 (+ v_main_~x~0_106 1))) (let ((.cse15 (mod main_~y~0 4294967296)) (.cse14 (mod v_main_~x~0_106 4294967296)) (.cse10 (= main_~x~0 .cse16)) (.cse11 (= |v_main_#t~post7_36| |v_main_#t~post7_35|)) (.cse12 (= |v_main_#t~post8_74| |v_main_#t~post8_73|)) (.cse13 (= v_main_~z~0_59 (+ main_~z~0 1)))) (or (and .cse10 .cse11 .cse12 .cse13) (and (< .cse14 .cse15) (= (+ main_~x~0 main_~z~0) (+ v_main_~x~0_106 v_main_~z~0_59)) (<= 5000000 .cse14) (< .cse16 main_~x~0) (<= (div (+ .cse15 (* main_~x~0 (- 1)) 1) (- 4294967296)) (+ (div (+ v_main_~x~0_106 (- 4294967295)) 4294967296) 1))) (and (or (<= .cse15 .cse14) (< .cse14 5000000)) .cse10 .cse11 .cse12 .cse13)))) (let ((.cse18 (div main_~y~0 4294967296))) (let ((.cse17 (<= .cse18 (div v_main_~x~0_106 4294967296)))) (or (and (<= (+ v_main_~x~0_106 5000000) main_~y~0) .cse17) (and (< 0 (+ .cse18 1)) (let ((.cse19 (* 4294967296 (div v_main_~z~0_59 4294967296)))) (or (<= (+ v_main_~x~0_106 v_main_~z~0_59 (* 4294967296 .cse18)) (+ .cse19 main_~y~0)) (<= v_main_~z~0_59 .cse19))) .cse17)))))) (< (mod (+ main_~x~0 4294967295) 4294967296) 5000000) (<= 4999999 main_~z~0) (<= main_~y~0 10000000) (<= (+ main_~z~0 5000001) main_~y~0) .cse0))) [2021-05-06 12:02:55,748 INFO L194 CegarLoopUtils]: At program point L11-2(lines 11 15) the Hoare annotation is: (let ((.cse1 (<= (+ main_~z~0 5000000) main_~y~0)) (.cse12 (<= 5000000 main_~z~0)) (.cse0 (mod (+ main_~x~0 4294967295) 4294967296)) (.cse2 (<= main_~y~0 10000000)) (.cse13 (* main_~x~0 (- 1)))) (or (and (< .cse0 5000000) .cse1 .cse2 (exists ((|v_main_#t~post7_77| Int) (|v_main_#t~post8_155| Int) (|v_main_#t~post8_156| Int) (v_main_~z~0_183 Int) (v_main_~x~0_278 Int)) (and (let ((.cse5 (= main_~x~0 (+ v_main_~x~0_278 1))) (.cse3 (mod main_~y~0 4294967296)) (.cse4 (mod v_main_~x~0_278 4294967296)) (.cse6 (= |main_#t~post7| |v_main_#t~post7_77|)) (.cse7 (= main_~z~0 v_main_~z~0_183)) (.cse8 (= |v_main_#t~post8_156| |v_main_#t~post8_155|))) (or (and (<= (div (+ .cse3 main_~z~0 (* v_main_~z~0_183 (- 1)) (* v_main_~x~0_278 (- 1))) (- 4294967296)) (+ (div (+ v_main_~x~0_278 (- 4294967295)) 4294967296) 1)) (= (+ v_main_~z~0_183 v_main_~x~0_278 1) (+ main_~x~0 main_~z~0)) (< .cse4 .cse3) (< main_~z~0 v_main_~z~0_183) (<= 5000000 .cse4)) (and .cse5 .cse6 .cse7 .cse8) (and .cse5 (or (< .cse4 5000000) (<= .cse3 .cse4)) .cse6 .cse7 .cse8))) (let ((.cse10 (div main_~y~0 4294967296))) (let ((.cse9 (<= .cse10 (div v_main_~x~0_278 4294967296)))) (or (and (<= (+ v_main_~x~0_278 5000000) main_~y~0) .cse9) (and (let ((.cse11 (* 4294967296 (div v_main_~z~0_183 4294967296)))) (or (<= (+ v_main_~z~0_183 v_main_~x~0_278 (* 4294967296 .cse10)) (+ main_~y~0 .cse11)) (<= v_main_~z~0_183 .cse11))) .cse9)))))) .cse12 (<= (div (+ .cse13 5000001) (- 4294967296)) 0)) (and .cse1 .cse2 (= main_~x~0 0) .cse12) (and (<= 5000000 .cse0) (<= 4999999 main_~z~0) (< (mod (+ main_~x~0 4294967294) 4294967296) 5000000) .cse2 (<= (+ main_~z~0 5000001) main_~y~0) (<= (div (+ .cse13 5000002) (- 4294967296)) 0) (< 2 main_~x~0)))) [2021-05-06 12:02:55,748 INFO L194 CegarLoopUtils]: At program point L11-3(lines 11 15) the Hoare annotation is: false [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,748 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: true [2021-05-06 12:02:55,758 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,759 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,760 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,761 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,762 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,762 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,768 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,769 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,770 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,771 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,772 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:02:55 BoogieIcfgContainer [2021-05-06 12:02:55,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:02:55,774 INFO L168 Benchmark]: Toolchain (without parser) took 386965.99 ms. Allocated memory is still 184.5 MB. Free memory was 149.1 MB in the beginning and 122.8 MB in the end (delta: 26.3 MB). Peak memory consumption was 100.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:02:55,774 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 184.5 MB. Free memory was 165.5 MB in the beginning and 165.4 MB in the end (delta: 107.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:02:55,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.70 ms. Allocated memory is still 184.5 MB. Free memory was 148.9 MB in the beginning and 167.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:02:55,775 INFO L168 Benchmark]: Boogie Preprocessor took 22.29 ms. Allocated memory is still 184.5 MB. Free memory was 167.6 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:02:55,775 INFO L168 Benchmark]: RCFGBuilder took 329.42 ms. Allocated memory is still 184.5 MB. Free memory was 166.1 MB in the beginning and 152.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:02:55,775 INFO L168 Benchmark]: TraceAbstraction took 386357.08 ms. Allocated memory is still 184.5 MB. Free memory was 151.9 MB in the beginning and 122.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 104.2 MB. Max. memory is 8.0 GB. [2021-05-06 12:02:55,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 184.5 MB. Free memory was 165.5 MB in the beginning and 165.4 MB in the end (delta: 107.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.70 ms. Allocated memory is still 184.5 MB. Free memory was 148.9 MB in the beginning and 167.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.29 ms. Allocated memory is still 184.5 MB. Free memory was 167.6 MB in the beginning and 166.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.42 ms. Allocated memory is still 184.5 MB. Free memory was 166.1 MB in the beginning and 152.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 386357.08 ms. Allocated memory is still 184.5 MB. Free memory was 151.9 MB in the beginning and 122.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 104.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 378296.3ms, OverallIterations: 21, TraceHistogramMax: 19, EmptinessCheckTime: 21.3ms, AutomataDifference: 125646.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 7989.4ms, InitialAbstractionConstructionTime: 24.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 216 SDtfs, 516 SDslu, 2012 SDs, 0 SdLazy, 17853 SolverSat, 461 SolverUnsat, 90 SolverUnknown, 0 SolverNotchecked, 23899.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1176 GetRequests, 108 SyntacticMatches, 176 SemanticMatches, 892 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9199 ImplicationChecksByTransitivity, 265120.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=20, InterpolantAutomatonStates: 431, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 315.8ms AutomataMinimizationTime, 21 MinimizatonAttempts, 20 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 141 PreInvPairs, 196 NumberOfFragments, 1176 HoareAnnotationTreeSize, 141 FomulaSimplifications, 72455758 FormulaSimplificationTreeSizeReduction, 479.0ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 35187821 FormulaSimplificationTreeSizeReductionInter, 7492.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,779 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,780 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,781 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,782 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,782 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,783 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post7_77,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_156,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_#t~post8_155,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,784 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,785 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] [2021-05-06 12:02:55,785 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,785 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,785 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~z~0_183,QUANTIFIED] [2021-05-06 12:02:55,785 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_278,QUANTIFIED] Derived loop invariant: (((((((x + 4294967295) % 4294967296 < 5000000 && z + 5000000 <= y) && y <= 10000000) && (\exists v_main_#t~post7_77 : int, v_main_#t~post8_155 : int, v_main_#t~post8_156 : int, v_main_~z~0_183 : int, v_main_~x~0_278 : int :: (((((((y % 4294967296 + z + v_main_~z~0_183 * -1 + v_main_~x~0_278 * -1) / -4294967296 <= (v_main_~x~0_278 + -4294967295) / 4294967296 + 1 && v_main_~z~0_183 + v_main_~x~0_278 + 1 == x + z) && v_main_~x~0_278 % 4294967296 < y % 4294967296) && z < v_main_~z~0_183) && 5000000 <= v_main_~x~0_278 % 4294967296) || (((x == v_main_~x~0_278 + 1 && aux-z---aux == v_main_#t~post7_77) && z == v_main_~z~0_183) && v_main_#t~post8_156 == v_main_#t~post8_155)) || ((((x == v_main_~x~0_278 + 1 && (v_main_~x~0_278 % 4294967296 < 5000000 || y % 4294967296 <= v_main_~x~0_278 % 4294967296)) && aux-z---aux == v_main_#t~post7_77) && z == v_main_~z~0_183) && v_main_#t~post8_156 == v_main_#t~post8_155)) && ((v_main_~x~0_278 + 5000000 <= y && y / 4294967296 <= v_main_~x~0_278 / 4294967296) || ((v_main_~z~0_183 + v_main_~x~0_278 + 4294967296 * (y / 4294967296) <= y + 4294967296 * (v_main_~z~0_183 / 4294967296) || v_main_~z~0_183 <= 4294967296 * (v_main_~z~0_183 / 4294967296)) && y / 4294967296 <= v_main_~x~0_278 / 4294967296)))) && 5000000 <= z) && (x * -1 + 5000001) / -4294967296 <= 0) || (((z + 5000000 <= y && y <= 10000000) && x == 0) && 5000000 <= z)) || ((((((5000000 <= (x + 4294967295) % 4294967296 && 4999999 <= z) && (x + 4294967294) % 4294967296 < 5000000) && y <= 10000000) && z + 5000001 <= y) && (x * -1 + 5000002) / -4294967296 <= 0) && 2 < x) - ProcedureContractResult [Line: 6]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...