/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/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:39,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:39,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:40,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:40,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:40,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:40,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:40,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:01:40,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:40,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:40,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:40,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:40,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:40,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:40,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:40,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:40,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:40,105 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:40,105 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:40,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:40,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:40,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:40,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:40,406 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:40,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-05-02 23:01:40,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947da24b/0d9f56a0c92b423c83bb1ccdf8a3e182/FLAG6276cf283 [2021-05-02 23:01:40,852 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:40,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-05-02 23:01:40,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947da24b/0d9f56a0c92b423c83bb1ccdf8a3e182/FLAG6276cf283 [2021-05-02 23:01:41,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c947da24b/0d9f56a0c92b423c83bb1ccdf8a3e182 [2021-05-02 23:01:41,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:41,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:41,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:41,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:41,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:41,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5571a11d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:41,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:41,404 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/heavy-2.c[600,613] [2021-05-02 23:01:41,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:41,457 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:41,492 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/heavy-2.c[600,613] [2021-05-02 23:01:41,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:41,525 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:41,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41 WrapperNode [2021-05-02 23:01:41,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:41,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:41,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:41,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:41,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:41,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:41,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:41,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:41,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 23:01:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:41,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:41,834 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 23:01:41,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:41 BoogieIcfgContainer [2021-05-02 23:01:41,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:41,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:41,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:41,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:41,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:41" (1/3) ... [2021-05-02 23:01:41,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b6e488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (2/3) ... [2021-05-02 23:01:41,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b6e488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:41" (3/3) ... [2021-05-02 23:01:41,840 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-05-02 23:01:41,844 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:41,846 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:41,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:41,879 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:41,879 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:41,879 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:41,879 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:41,879 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:41,880 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:41,880 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:41,880 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 23:01:41,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:41,894 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:41,894 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2021-05-02 23:01:41,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:41,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985163668] [2021-05-02 23:01:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:41,945 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985163668] [2021-05-02 23:01:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985163668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:01:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597690277] [2021-05-02 23:01:42,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:01:42,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:01:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:42,100 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,165 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2021-05-02 23:01:42,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:01:42,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 23:01:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,171 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:01:42,172 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:01:42,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:01:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-05-02 23:01:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 23:01:42,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-05-02 23:01:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,195 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 23:01:42,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 23:01:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 23:01:42,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,196 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:42,200 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2021-05-02 23:01:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600999711] [2021-05-02 23:01:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,203 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600999711] [2021-05-02 23:01:42,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [600999711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:01:42,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081014534] [2021-05-02 23:01:42,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:01:42,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:01:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:01:42,309 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,391 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 23:01:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:01:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 23:01:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,392 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:01:42,392 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:01:42,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:01:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2021-05-02 23:01:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 23:01:42,397 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-05-02 23:01:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,398 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 23:01:42,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 23:01:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:01:42,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,398 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:42,399 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2021-05-02 23:01:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850426848] [2021-05-02 23:01:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:42,418 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:42,437 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:01:42,452 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850426848] [2021-05-02 23:01:42,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [850426848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:01:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478082211] [2021-05-02 23:01:42,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:01:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:01:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:42,590 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,743 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 23:01:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:01:42,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:01:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,745 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:01:42,745 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:01:42,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:01:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 17. [2021-05-02 23:01:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 23:01:42,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-05-02 23:01:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,755 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 23:01:42,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 23:01:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:42,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,756 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:42,757 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2021-05-02 23:01:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126578389] [2021-05-02 23:01:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,765 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:42,766 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:42,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-02 23:01:42,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:42,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:42,801 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-02 23:01:42,818 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,922 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126578389] [2021-05-02 23:01:42,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126578389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:01:42,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194253519] [2021-05-02 23:01:42,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:01:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:01:42,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:42,923 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,061 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 23:01:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:01:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,062 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:01:43,063 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:01:43,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:01:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-05-02 23:01:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 23:01:43,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-05-02 23:01:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,066 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 23:01:43,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 23:01:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:01:43,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,066 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:43,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:01:43,067 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2021-05-02 23:01:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569713082] [2021-05-02 23:01:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,584 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:01:43,600 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,601 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:43,603 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:43,625 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:01:43,640 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,645 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,647 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,652 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,656 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,660 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,667 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,684 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:01:43,686 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:01:43,713 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:01:43,726 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:01:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:49,914 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:01:49,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:51,988 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:01:51,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:01:51,991 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569713082] [2021-05-02 23:01:51,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569713082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:51,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:51,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:51,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623466576] [2021-05-02 23:01:51,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=34, Unknown=1, NotChecked=0, Total=56 [2021-05-02 23:01:51,993 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:58,209 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 23:01:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:01:58,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:01:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:58,212 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:01:58,212 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:01:58,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 10304.6ms TimeCoverageRelationStatistics Valid=39, Invalid=69, Unknown=2, NotChecked=0, Total=110 [2021-05-02 23:01:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:01:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2021-05-02 23:01:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 23:01:58,215 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-02 23:01:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,216 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 23:01:58,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 23:01:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:01:58,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,216 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:01:58,216 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2021-05-02 23:01:58,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950310715] [2021-05-02 23:01:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:59,865 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-05-02 23:02:01,334 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2021-05-02 23:02:01,355 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,356 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:01,359 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:01,383 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:02:01,397 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,399 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,400 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,402 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,404 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,407 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,409 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,412 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,414 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,415 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,416 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,418 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,420 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,421 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,422 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:01,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:01,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:01,486 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:02:01,499 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:02:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:07,642 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:02:07,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:09,685 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:02:09,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:17,783 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:02:17,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:19,834 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:02:19,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:19,853 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:19,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950310715] [2021-05-02 23:02:19,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950310715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:19,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:19,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:02:19,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505466081] [2021-05-02 23:02:19,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:02:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:02:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=58, Unknown=3, NotChecked=0, Total=90 [2021-05-02 23:02:19,854 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:30,128 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-02 23:02:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:02:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:02:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:30,129 INFO L225 Difference]: With dead ends: 39 [2021-05-02 23:02:30,129 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:02:30,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20379.7ms TimeCoverageRelationStatistics Valid=47, Invalid=105, Unknown=4, NotChecked=0, Total=156 [2021-05-02 23:02:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:02:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-05-02 23:02:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 23:02:30,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-05-02 23:02:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:30,133 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 23:02:30,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 23:02:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:02:30,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:30,134 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:30,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:02:30,134 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash -617772747, now seen corresponding path program 3 times [2021-05-02 23:02:30,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:30,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34399264] [2021-05-02 23:02:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:31,615 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2021-05-02 23:02:33,286 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 135 DAG size of output: 107 [2021-05-02 23:02:33,310 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,310 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:33,311 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:33,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:02:33,341 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,344 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,345 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,347 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,348 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,349 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,351 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,352 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,354 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,355 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,356 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,357 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,367 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,369 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,371 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:33,387 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:02:33,389 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:02:33,416 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:02:33,434 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:02:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:33,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:39,590 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:02:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:41,630 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:02:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:49,755 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:02:49,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:51,826 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:02:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:02:59,943 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-02 23:02:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:02,012 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 95 [2021-05-02 23:03:02,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:02,016 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34399264] [2021-05-02 23:03:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [34399264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:02,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:02,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:03:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114910723] [2021-05-02 23:03:02,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:03:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:03:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=90, Unknown=5, NotChecked=0, Total=132 [2021-05-02 23:03:02,017 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:03:16,360 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-05-02 23:03:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:03:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 23:03:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:03:16,361 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:03:16,361 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:03:16,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30611.7ms TimeCoverageRelationStatistics Valid=55, Invalid=149, Unknown=6, NotChecked=0, Total=210 [2021-05-02 23:03:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:03:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-05-02 23:03:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 23:03:16,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-05-02 23:03:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:03:16,366 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 23:03:16,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:03:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 23:03:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:03:16,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:03:16,386 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:03:16,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:03:16,386 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:03:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:03:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -272617773, now seen corresponding path program 4 times [2021-05-02 23:03:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:03:16,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189500942] [2021-05-02 23:03:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:03:16,974 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:03:17,570 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:03:17,585 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,586 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:03:17,588 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:17,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:03:17,632 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,634 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,635 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,636 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,637 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,638 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,639 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,640 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:03:17,655 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:03:17,656 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:03:17,683 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:03:17,699 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:03:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:17,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:03:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:03:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:03:17,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:23,874 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:03:23,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:25,915 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:03:25,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:34,003 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:03:34,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:36,053 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 23:03:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:44,175 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-05-02 23:03:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:46,235 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 77 [2021-05-02 23:03:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:54,371 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-02 23:03:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:56,461 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:03:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:03:56,465 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:03:56,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189500942] [2021-05-02 23:03:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189500942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:03:56,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:03:56,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:03:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818831571] [2021-05-02 23:03:56,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:03:56,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:03:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:03:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=130, Unknown=7, NotChecked=0, Total=182 [2021-05-02 23:03:56,466 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:04:14,979 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 23:04:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:04:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 23:04:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:04:14,981 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:04:14,981 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:04:14,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40821.2ms TimeCoverageRelationStatistics Valid=63, Invalid=201, Unknown=8, NotChecked=0, Total=272 [2021-05-02 23:04:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:04:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-05-02 23:04:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 23:04:14,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2021-05-02 23:04:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:04:14,986 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 23:04:14,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:04:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 23:04:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:04:14,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:04:14,987 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:04:14,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:04:14,987 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:04:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:04:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 708830449, now seen corresponding path program 5 times [2021-05-02 23:04:14,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:04:14,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310038694] [2021-05-02 23:04:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:04:17,446 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-02 23:04:19,997 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-05-02 23:04:20,035 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,035 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:04:20,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:04:20,060 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:04:20,077 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,079 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,080 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,082 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,084 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,085 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,087 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,088 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,090 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,091 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,093 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,095 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,097 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,098 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,099 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,101 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:04:20,118 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:04:20,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:04:20,153 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:04:20,174 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:04:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:20,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:04:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:04:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:04:20,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:26,373 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:04:26,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:28,439 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:04:28,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:36,551 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-02 23:04:36,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:38,606 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:04:38,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:46,740 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-05-02 23:04:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:48,835 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 82 [2021-05-02 23:04:48,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:56,982 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-05-02 23:04:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:04:59,095 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 105 [2021-05-02 23:04:59,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:07,352 WARN L205 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-05-02 23:05:07,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:09,542 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 127 [2021-05-02 23:05:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:09,548 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:05:09,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310038694] [2021-05-02 23:05:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310038694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:05:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:05:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:05:09,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119163435] [2021-05-02 23:05:09,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:05:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:05:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:05:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=178, Unknown=9, NotChecked=0, Total=240 [2021-05-02 23:05:09,549 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:05:32,508 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 23:05:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:05:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:05:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:05:32,510 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:05:32,510 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:05:32,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51499.6ms TimeCoverageRelationStatistics Valid=71, Invalid=261, Unknown=10, NotChecked=0, Total=342 [2021-05-02 23:05:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:05:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 23:05:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 23:05:32,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-02 23:05:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:05:32,517 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 23:05:32,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:05:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 23:05:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:05:32,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:05:32,518 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:05:32,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:05:32,518 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:05:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:05:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1012233329, now seen corresponding path program 6 times [2021-05-02 23:05:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:05:32,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596169178] [2021-05-02 23:05:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:05:35,625 WARN L205 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:05:37,699 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:05:37,742 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,743 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:05:37,745 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:05:37,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:05:37,807 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,809 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,812 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,814 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,817 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,819 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,823 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,826 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,829 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,831 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,833 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,836 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,838 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,841 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:05:37,879 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:05:37,882 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:05:37,931 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:05:37,972 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:05:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:38,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:05:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:05:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:05:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:44,278 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 23:05:44,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:46,337 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 23:05:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:54,505 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-02 23:05:54,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:05:56,589 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:05:56,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:04,775 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-02 23:06:04,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:06,876 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 61 [2021-05-02 23:06:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:15,088 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-05-02 23:06:15,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:17,238 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 76 [2021-05-02 23:06:17,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:25,470 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-05-02 23:06:25,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:27,632 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 102 [2021-05-02 23:06:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:35,986 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-05-02 23:06:35,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:38,298 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 117 [2021-05-02 23:06:38,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:06:38,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:06:38,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596169178] [2021-05-02 23:06:38,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596169178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:06:38,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:06:38,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:06:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417742134] [2021-05-02 23:06:38,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:06:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:06:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:06:38,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2021-05-02 23:06:38,309 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:07:06,253 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 23:07:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:07:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 23:07:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:07:06,258 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:07:06,258 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:07:06,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62512.1ms TimeCoverageRelationStatistics Valid=79, Invalid=329, Unknown=12, NotChecked=0, Total=420 [2021-05-02 23:07:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:07:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-05-02 23:07:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 23:07:06,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-02 23:07:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:07:06,275 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 23:07:06,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:07:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 23:07:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:07:06,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:07:06,278 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:07:06,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:07:06,278 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:07:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:07:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1392115027, now seen corresponding path program 7 times [2021-05-02 23:07:06,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:07:06,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144570389] [2021-05-02 23:07:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:07:09,234 WARN L205 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:07:12,556 WARN L205 SmtUtils]: Spent 3.26 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:07:12,587 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,588 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:07:12,595 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:07:12,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:07:12,685 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,689 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,692 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,695 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,699 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,702 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,709 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,713 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,716 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,719 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,722 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,726 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,730 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,733 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,737 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,740 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:07:12,786 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:07:12,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:07:12,855 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:07:12,905 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:07:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:13,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:07:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:07:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:07:13,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:19,327 WARN L205 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:07:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:21,431 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:07:21,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:29,650 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:07:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:31,775 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:07:31,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:40,012 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-05-02 23:07:40,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:42,195 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:07:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:50,686 WARN L205 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-02 23:07:50,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:07:52,854 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:07:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:01,231 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-05-02 23:08:01,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:03,503 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:08:03,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:11,870 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-05-02 23:08:11,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:14,124 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:08:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:22,583 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 108 DAG size of output: 106 [2021-05-02 23:08:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:24,937 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 106 [2021-05-02 23:08:24,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:08:24,950 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:08:24,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144570389] [2021-05-02 23:08:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144570389] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:08:24,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:08:24,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:08:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846806814] [2021-05-02 23:08:24,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:08:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:08:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:08:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=298, Unknown=13, NotChecked=0, Total=380 [2021-05-02 23:08:24,952 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:25,096 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:08:25,353 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:08:29,615 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 23:08:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:08:58,293 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 23:08:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:08:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 23:08:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:08:58,302 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:08:58,302 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:08:58,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 74386.3ms TimeCoverageRelationStatistics Valid=87, Invalid=405, Unknown=14, NotChecked=0, Total=506 [2021-05-02 23:08:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:08:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 23:08:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 23:08:58,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2021-05-02 23:08:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:08:58,312 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 23:08:58,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:08:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 23:08:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:08:58,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:08:58,312 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:08:58,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:08:58,313 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:08:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:08:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1386206645, now seen corresponding path program 8 times [2021-05-02 23:08:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:08:58,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644130138] [2021-05-02 23:08:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:09:04,463 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 107 [2021-05-02 23:09:04,575 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:09:08,976 WARN L205 SmtUtils]: Spent 4.38 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:09:09,104 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 1 [2021-05-02 23:09:09,120 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,121 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:09:09,126 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:09:09,214 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:09:09,295 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,300 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,306 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,311 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,318 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,324 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,330 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,336 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:09:09,431 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:09:09,435 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:09:09,540 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:09:09,629 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:09:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:09,861 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:09:09,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:09:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:09:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:09:10,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:16,373 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:09:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:18,566 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:09:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:26,866 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-02 23:09:26,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:29,049 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:09:29,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:37,412 WARN L205 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-02 23:09:37,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:39,651 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:09:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:48,012 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-05-02 23:09:48,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:50,256 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 89 [2021-05-02 23:09:50,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:09:58,676 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-05-02 23:09:58,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:01,008 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 111 [2021-05-02 23:10:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:09,660 WARN L205 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 126 DAG size of output: 124 [2021-05-02 23:10:09,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:12,090 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 133 [2021-05-02 23:10:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:20,772 WARN L205 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 155 DAG size of output: 153 [2021-05-02 23:10:20,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:23,299 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 156 [2021-05-02 23:10:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:32,072 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-05-02 23:10:32,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:34,638 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 177 [2021-05-02 23:10:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:10:34,659 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:10:34,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644130138] [2021-05-02 23:10:34,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [644130138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:10:34,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:10:34,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:10:34,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722725365] [2021-05-02 23:10:34,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:10:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:10:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:10:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=370, Unknown=15, NotChecked=0, Total=462 [2021-05-02 23:10:34,661 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:10:34,878 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:10:35,305 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:10:39,704 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 23:11:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:11:15,516 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 23:11:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:11:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:11:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:11:15,528 INFO L225 Difference]: With dead ends: 51 [2021-05-02 23:11:15,528 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:11:15,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 87519.1ms TimeCoverageRelationStatistics Valid=95, Invalid=489, Unknown=16, NotChecked=0, Total=600 [2021-05-02 23:11:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:11:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-05-02 23:11:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-05-02 23:11:15,550 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2021-05-02 23:11:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:11:15,552 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-05-02 23:11:15,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:11:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-05-02 23:11:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:11:15,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:11:15,558 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:11:15,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:11:15,567 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:11:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:11:15,568 INFO L82 PathProgramCache]: Analyzing trace with hash -3218839, now seen corresponding path program 9 times [2021-05-02 23:11:15,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:11:15,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736141624] [2021-05-02 23:11:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:11:26,027 WARN L205 SmtUtils]: Spent 10.35 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:11:26,150 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:11:37,642 WARN L205 SmtUtils]: Spent 11.47 s on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-05-02 23:11:37,742 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:37,743 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:11:37,748 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:11:37,865 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:11:37,964 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:37,970 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:37,979 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:37,986 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:37,994 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:38,000 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:38,008 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:38,015 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:11:38,101 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:11:38,106 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:11:38,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:11:38,370 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:11:38,380 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:11:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:38,630 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:11:38,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:11:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:11:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:11:38,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:45,315 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:11:45,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:47,530 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:11:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:55,925 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-02 23:11:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:11:58,188 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 23:11:58,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:06,658 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-02 23:12:06,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:08,976 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 79 [2021-05-02 23:12:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:17,529 WARN L205 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2021-05-02 23:12:17,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:19,942 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 101 [2021-05-02 23:12:19,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:28,611 WARN L205 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-05-02 23:12:28,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:31,064 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 123 [2021-05-02 23:12:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:40,435 WARN L205 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2021-05-02 23:12:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:42,984 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 130 [2021-05-02 23:12:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:51,864 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 152 DAG size of output: 150 [2021-05-02 23:12:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:12:54,645 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 152 [2021-05-02 23:12:54,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:03,498 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 169 DAG size of output: 167 [2021-05-02 23:13:03,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:06,096 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 164 [2021-05-02 23:13:06,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:14,952 WARN L205 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 181 DAG size of output: 179 [2021-05-02 23:13:14,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:17,611 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 190 [2021-05-02 23:13:17,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:13:17,636 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:13:17,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736141624] [2021-05-02 23:13:17,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [736141624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:13:17,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:13:17,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:13:17,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322125878] [2021-05-02 23:13:17,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:13:17,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:13:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:13:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=450, Unknown=17, NotChecked=0, Total=552 [2021-05-02 23:13:17,639 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:13:17,994 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:13:18,588 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:13:23,045 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-02 23:14:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:14:06,229 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-05-02 23:14:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:14:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:14:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:14:06,247 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:14:06,247 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:14:06,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 101840.6ms TimeCoverageRelationStatistics Valid=103, Invalid=581, Unknown=18, NotChecked=0, Total=702 [2021-05-02 23:14:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:14:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-02 23:14:06,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:14:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-02 23:14:06,264 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-05-02 23:14:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:14:06,264 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-02 23:14:06,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:14:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-02 23:14:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:14:06,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:14:06,265 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:14:06,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:14:06,265 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:14:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:14:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1903168263, now seen corresponding path program 10 times [2021-05-02 23:14:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:14:06,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126018287] [2021-05-02 23:14:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:14:06,482 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:14:14,838 WARN L205 SmtUtils]: Spent 8.32 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:14:14,981 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 23:14:22,432 WARN L205 SmtUtils]: Spent 7.43 s on a formula simplification that was a NOOP. DAG size: 91 [2021-05-02 23:14:22,559 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 1 [2021-05-02 23:14:22,591 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,592 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:14:22,596 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:14:22,741 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:14:22,851 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 23:14:22,869 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,886 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,895 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,905 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,913 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,922 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:22,931 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:14:23,063 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:14:23,067 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:14:23,245 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:14:23,368 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:14:23,379 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:14:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:23,671 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 23:14:23,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:14:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:14:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:14:24,039 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2021-05-02 23:14:24,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:30,448 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-02 23:14:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:32,690 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:14:32,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:41,140 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-02 23:14:41,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:43,519 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 23:14:43,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:52,157 WARN L205 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-02 23:14:52,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:14:54,580 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:14:54,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:03,812 WARN L205 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-05-02 23:15:03,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:06,297 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 94 [2021-05-02 23:15:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:15,134 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-05-02 23:15:15,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:17,692 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 116 [2021-05-02 23:15:17,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:26,382 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2021-05-02 23:15:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:28,853 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 128 [2021-05-02 23:15:28,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:37,619 WARN L205 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2021-05-02 23:15:37,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:40,140 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 150 [2021-05-02 23:15:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:48,814 WARN L205 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2021-05-02 23:15:48,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:15:51,283 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 173 [2021-05-02 23:15:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:16:01,074 WARN L205 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 190 DAG size of output: 188 [2021-05-02 23:16:01,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:16:03,608 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 195 [2021-05-02 23:16:03,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:16:13,470 WARN L205 SmtUtils]: Spent 5.40 s on a formula simplification. DAG size of input: 212 DAG size of output: 210 [2021-05-02 23:16:13,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:16:16,315 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 216 [2021-05-02 23:16:16,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:16:16,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126018287] [2021-05-02 23:16:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [126018287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157447118] [2021-05-02 23:16:16,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:16,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=538, Unknown=19, NotChecked=0, Total=650 [2021-05-02 23:16:16,342 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,532 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 23:16:16,951 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 23:16:21,293 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 47