/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:22:35,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:22:35,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:22:35,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:22:35,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:22:35,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:22:35,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:22:35,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:22:35,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:22:35,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:22:35,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:22:35,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:22:35,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:22:35,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:22:35,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:22:35,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:22:35,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:22:35,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:22:35,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:22:35,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:22:35,162 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:22:35,162 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:22:35,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:22:35,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:22:35,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:22:35,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:22:35,416 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:22:35,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-06 11:22:35,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6321766a6/342c6eb46fe9452e986bbad9f9b0d13b/FLAG7f435cd1c [2021-05-06 11:22:35,944 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:22:35,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-06 11:22:35,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6321766a6/342c6eb46fe9452e986bbad9f9b0d13b/FLAG7f435cd1c [2021-05-06 11:22:36,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6321766a6/342c6eb46fe9452e986bbad9f9b0d13b [2021-05-06 11:22:36,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:22:36,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:22:36,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:22:36,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:22:36,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:22:36,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c552aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36, skipping insertion in model container [2021-05-06 11:22:36,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:22:36,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:22:36,361 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2021-05-06 11:22:36,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:22:36,375 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:22:36,395 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2021-05-06 11:22:36,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:22:36,415 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:22:36,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36 WrapperNode [2021-05-06 11:22:36,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:22:36,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:22:36,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:22:36,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:22:36,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... [2021-05-06 11:22:36,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:22:36,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:22:36,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:22:36,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:22:36,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:22:36,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:22:36,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:22:36,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:22:36,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:22:36,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-06 11:22:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:22:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:22:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:22:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:22:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:22:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:22:36,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:22:36,735 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:22:36,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:22:36 BoogieIcfgContainer [2021-05-06 11:22:36,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:22:36,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:22:36,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:22:36,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:22:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:22:36" (1/3) ... [2021-05-06 11:22:36,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36aa8ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:22:36, skipping insertion in model container [2021-05-06 11:22:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:22:36" (2/3) ... [2021-05-06 11:22:36,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36aa8ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:22:36, skipping insertion in model container [2021-05-06 11:22:36,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:22:36" (3/3) ... [2021-05-06 11:22:36,740 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-05-06 11:22:36,744 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:22:36,749 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:22:36,759 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:22:36,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:22:36,780 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:22:36,780 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:22:36,780 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:22:36,780 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:22:36,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:22:36,780 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:22:36,781 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:22:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:22:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:22:36,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:36,805 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:36,806 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2021-05-06 11:22:36,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:36,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417436606] [2021-05-06 11:22:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:36,861 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417436606] [2021-05-06 11:22:37,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417436606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:22:37,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098176888] [2021-05-06 11:22:37,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:22:37,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:22:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:22:37,044 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,100 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 11:22:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:22:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:22:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,105 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:22:37,105 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 11:22:37,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:22:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 11:22:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 11:22:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 11:22:37,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 11:22:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,133 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 11:22:37,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 11:22:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:22:37,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,134 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:22:37,135 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,135 INFO L82 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2021-05-06 11:22:37,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444254300] [2021-05-06 11:22:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,148 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444254300] [2021-05-06 11:22:37,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [444254300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:22:37,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190489830] [2021-05-06 11:22:37,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:22:37,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:22:37,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:22:37,217 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,241 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 11:22:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:22:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:22:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,242 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:22:37,243 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 11:22:37,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:22:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 11:22:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-06 11:22:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 11:22:37,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-06 11:22:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,282 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 11:22:37,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 11:22:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:22:37,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,282 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:22:37,283 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2021-05-06 11:22:37,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362110784] [2021-05-06 11:22:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,298 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,299 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,301 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,373 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362110784] [2021-05-06 11:22:37,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362110784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:22:37,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833275894] [2021-05-06 11:22:37,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:22:37,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:22:37,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:22:37,375 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,413 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 11:22:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:22:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:22:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,414 INFO L225 Difference]: With dead ends: 24 [2021-05-06 11:22:37,414 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 11:22:37,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:22:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 11:22:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 11:22:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 11:22:37,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-06 11:22:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,424 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 11:22:37,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 11:22:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 11:22:37,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,425 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:22:37,425 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 2 times [2021-05-06 11:22:37,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967255985] [2021-05-06 11:22:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,431 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,431 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,433 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,505 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967255985] [2021-05-06 11:22:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [967255985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:22:37,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922015074] [2021-05-06 11:22:37,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:22:37,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:22:37,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:22:37,507 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,550 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 11:22:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:22:37,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 11:22:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,553 INFO L225 Difference]: With dead ends: 26 [2021-05-06 11:22:37,553 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 11:22:37,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:22:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 11:22:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-06 11:22:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 11:22:37,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-06 11:22:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,565 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 11:22:37,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 11:22:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 11:22:37,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,566 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:22:37,567 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 3 times [2021-05-06 11:22:37,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422334087] [2021-05-06 11:22:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,576 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,576 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422334087] [2021-05-06 11:22:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422334087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:22:37,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785490290] [2021-05-06 11:22:37,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:22:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:22:37,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:22:37,658 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,694 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 11:22:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:22:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 11:22:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,701 INFO L225 Difference]: With dead ends: 28 [2021-05-06 11:22:37,701 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 11:22:37,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:22:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 11:22:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 11:22:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 11:22:37,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-06 11:22:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,705 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 11:22:37,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 11:22:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 11:22:37,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,706 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:22:37,709 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 4 times [2021-05-06 11:22:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576155740] [2021-05-06 11:22:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,717 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,717 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,718 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,775 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576155740] [2021-05-06 11:22:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1576155740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:22:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48544162] [2021-05-06 11:22:37,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:22:37,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:22:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:22:37,777 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,817 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 11:22:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:22:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 11:22:37,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,819 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:22:37,819 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 11:22:37,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:22:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 11:22:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-06 11:22:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 11:22:37,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-06 11:22:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,829 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 11:22:37,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 11:22:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:22:37,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,829 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:22:37,829 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 5 times [2021-05-06 11:22:37,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856748497] [2021-05-06 11:22:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,835 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,835 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,837 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:37,934 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856748497] [2021-05-06 11:22:37,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856748497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:37,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:37,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:22:37,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864020106] [2021-05-06 11:22:37,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:22:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:22:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:22:37,936 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:37,978 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 11:22:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:22:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 11:22:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:37,980 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:22:37,980 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 11:22:37,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:22:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 11:22:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 11:22:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 11:22:37,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-06 11:22:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:37,988 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 11:22:37,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 11:22:37,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 11:22:37,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:37,989 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:37,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:22:37,990 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:37,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:37,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 6 times [2021-05-06 11:22:37,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:37,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010262834] [2021-05-06 11:22:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:37,997 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:37,997 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:37,998 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010262834] [2021-05-06 11:22:38,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010262834] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:22:38,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287153773] [2021-05-06 11:22:38,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:22:38,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:22:38,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:22:38,091 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:38,141 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 11:22:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:22:38,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 11:22:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:38,143 INFO L225 Difference]: With dead ends: 34 [2021-05-06 11:22:38,143 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 11:22:38,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:22:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 11:22:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 11:22:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 11:22:38,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-06 11:22:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:38,151 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 11:22:38,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 11:22:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 11:22:38,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:38,151 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:38,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:22:38,152 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 7 times [2021-05-06 11:22:38,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:38,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977219926] [2021-05-06 11:22:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:38,156 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:38,156 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:38,157 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,255 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977219926] [2021-05-06 11:22:38,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [977219926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:22:38,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672790136] [2021-05-06 11:22:38,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:22:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:22:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:22:38,256 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:38,306 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 11:22:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:22:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 11:22:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:38,306 INFO L225 Difference]: With dead ends: 36 [2021-05-06 11:22:38,307 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 11:22:38,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:22:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 11:22:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-06 11:22:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 11:22:38,309 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-06 11:22:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:38,309 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 11:22:38,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 11:22:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:22:38,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:38,310 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:38,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:22:38,310 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 8 times [2021-05-06 11:22:38,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:38,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502898185] [2021-05-06 11:22:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:38,321 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:38,322 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:38,322 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,423 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502898185] [2021-05-06 11:22:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502898185] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:22:38,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568145942] [2021-05-06 11:22:38,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:22:38,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:22:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:22:38,424 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:38,459 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 11:22:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:22:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 11:22:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:38,459 INFO L225 Difference]: With dead ends: 38 [2021-05-06 11:22:38,460 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:22:38,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:22:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:22:38,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-06 11:22:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 11:22:38,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-06 11:22:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:38,462 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 11:22:38,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 11:22:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 11:22:38,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:38,463 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:38,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:22:38,463 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:38,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 9 times [2021-05-06 11:22:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:38,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484864820] [2021-05-06 11:22:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:38,470 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:38,470 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:38,471 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,573 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484864820] [2021-05-06 11:22:38,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [484864820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:22:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862123280] [2021-05-06 11:22:38,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:22:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:22:38,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:22:38,576 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:38,634 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 11:22:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:22:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 11:22:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:38,635 INFO L225 Difference]: With dead ends: 40 [2021-05-06 11:22:38,635 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 11:22:38,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:22:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 11:22:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 11:22:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 11:22:38,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-06 11:22:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:38,638 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 11:22:38,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 11:22:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 11:22:38,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:38,638 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:38,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:22:38,639 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 10 times [2021-05-06 11:22:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:38,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241160835] [2021-05-06 11:22:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:38,644 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:38,644 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:38,645 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,745 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241160835] [2021-05-06 11:22:38,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [241160835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-06 11:22:38,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241749169] [2021-05-06 11:22:38,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 11:22:38,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 11:22:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:22:38,746 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:38,808 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 11:22:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:22:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 11:22:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:38,810 INFO L225 Difference]: With dead ends: 42 [2021-05-06 11:22:38,810 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 11:22:38,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:22:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 11:22:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-06 11:22:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 11:22:38,823 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-06 11:22:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:38,824 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 11:22:38,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 11:22:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:22:38,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:38,826 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:38,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:22:38,827 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 11 times [2021-05-06 11:22:38,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:38,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238012505] [2021-05-06 11:22:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:38,832 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:38,832 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:38,834 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:38,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:38,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238012505] [2021-05-06 11:22:38,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238012505] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:38,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:38,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-06 11:22:38,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373912986] [2021-05-06 11:22:38,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 11:22:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 11:22:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:22:38,964 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:39,025 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 11:22:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:22:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:22:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:39,026 INFO L225 Difference]: With dead ends: 44 [2021-05-06 11:22:39,026 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 11:22:39,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:22:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 11:22:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 11:22:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 11:22:39,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-06 11:22:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:39,029 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 11:22:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 11:22:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 11:22:39,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:39,029 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:39,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:22:39,029 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 12 times [2021-05-06 11:22:39,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:39,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831207143] [2021-05-06 11:22:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:39,034 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:39,034 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:39,035 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:39,152 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:39,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831207143] [2021-05-06 11:22:39,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [831207143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:39,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:39,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:22:39,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91538098] [2021-05-06 11:22:39,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:22:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:22:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:22:39,153 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:39,211 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 11:22:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:22:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 11:22:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:39,212 INFO L225 Difference]: With dead ends: 46 [2021-05-06 11:22:39,212 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 11:22:39,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:22:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 11:22:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 11:22:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 11:22:39,214 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-06 11:22:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:39,215 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 11:22:39,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 11:22:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 11:22:39,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:39,215 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:39,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 11:22:39,215 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 13 times [2021-05-06 11:22:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:39,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71425295] [2021-05-06 11:22:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:39,219 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:39,219 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:39,220 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:39,338 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:39,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71425295] [2021-05-06 11:22:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [71425295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:39,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:39,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 11:22:39,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705727165] [2021-05-06 11:22:39,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 11:22:39,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 11:22:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:22:39,340 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:39,405 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 11:22:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 11:22:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 11:22:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:39,406 INFO L225 Difference]: With dead ends: 48 [2021-05-06 11:22:39,406 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 11:22:39,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:22:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 11:22:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 11:22:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 11:22:39,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-06 11:22:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:39,409 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 11:22:39,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 11:22:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:22:39,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:39,409 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:39,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:22:39,409 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 14 times [2021-05-06 11:22:39,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:39,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411191727] [2021-05-06 11:22:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:39,413 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:39,413 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:39,414 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:39,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:39,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411191727] [2021-05-06 11:22:39,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1411191727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:39,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:39,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:22:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298913225] [2021-05-06 11:22:39,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:22:39,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:39,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:22:39,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:22:39,588 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:39,656 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 11:22:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 11:22:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 11:22:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:39,657 INFO L225 Difference]: With dead ends: 50 [2021-05-06 11:22:39,657 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 11:22:39,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:22:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 11:22:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 11:22:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 11:22:39,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-06 11:22:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:39,660 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 11:22:39,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 11:22:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 11:22:39,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:39,661 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:39,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 11:22:39,661 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 15 times [2021-05-06 11:22:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:39,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949857628] [2021-05-06 11:22:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:39,666 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:39,667 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:39,667 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:39,821 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949857628] [2021-05-06 11:22:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949857628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:39,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:39,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:22:39,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407146629] [2021-05-06 11:22:39,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:22:39,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:22:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:22:39,823 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:39,885 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 11:22:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:22:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 11:22:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:39,886 INFO L225 Difference]: With dead ends: 52 [2021-05-06 11:22:39,886 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 11:22:39,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:22:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 11:22:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 11:22:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 11:22:39,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-06 11:22:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:39,889 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 11:22:39,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 11:22:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 11:22:39,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:39,890 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:39,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 11:22:39,890 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 16 times [2021-05-06 11:22:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:39,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418903486] [2021-05-06 11:22:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:39,896 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:39,896 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:39,897 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:40,090 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:40,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418903486] [2021-05-06 11:22:40,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [418903486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:40,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:40,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-06 11:22:40,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010525495] [2021-05-06 11:22:40,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 11:22:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 11:22:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:22:40,091 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:40,165 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 11:22:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 11:22:40,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 11:22:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:40,166 INFO L225 Difference]: With dead ends: 54 [2021-05-06 11:22:40,166 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 11:22:40,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:22:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 11:22:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-06 11:22:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 11:22:40,168 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-06 11:22:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:40,168 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 11:22:40,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 11:22:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:22:40,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:40,169 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:40,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:22:40,169 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:40,169 INFO L82 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 17 times [2021-05-06 11:22:40,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:40,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822760609] [2021-05-06 11:22:40,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:40,173 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:40,173 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:40,174 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:40,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:40,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822760609] [2021-05-06 11:22:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822760609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:40,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:40,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:22:40,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517966628] [2021-05-06 11:22:40,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:22:40,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:40,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:22:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:22:40,338 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:40,436 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 11:22:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 11:22:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:22:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:40,437 INFO L225 Difference]: With dead ends: 56 [2021-05-06 11:22:40,437 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 11:22:40,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:22:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 11:22:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-06 11:22:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 11:22:40,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-06 11:22:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:40,440 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 11:22:40,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 11:22:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:22:40,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:40,440 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:40,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 11:22:40,440 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:40,441 INFO L82 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 18 times [2021-05-06 11:22:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:40,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655890264] [2021-05-06 11:22:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:40,452 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:40,452 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:40,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:40,676 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655890264] [2021-05-06 11:22:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655890264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:40,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-06 11:22:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632079950] [2021-05-06 11:22:40,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 11:22:40,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 11:22:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:22:40,678 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:40,740 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 11:22:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:22:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 11:22:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:40,741 INFO L225 Difference]: With dead ends: 58 [2021-05-06 11:22:40,741 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 11:22:40,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:22:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 11:22:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-06 11:22:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 11:22:40,743 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-06 11:22:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:40,744 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 11:22:40,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 11:22:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 11:22:40,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:40,744 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:40,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 11:22:40,744 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 19 times [2021-05-06 11:22:40,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:40,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916581783] [2021-05-06 11:22:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:40,760 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:40,760 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:40,761 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:40,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916581783] [2021-05-06 11:22:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916581783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:40,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:40,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-06 11:22:40,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194238739] [2021-05-06 11:22:40,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 11:22:40,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:40,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 11:22:40,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:22:40,984 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:41,084 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 11:22:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 11:22:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 11:22:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:41,085 INFO L225 Difference]: With dead ends: 60 [2021-05-06 11:22:41,085 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 11:22:41,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 11:22:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 11:22:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 11:22:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 11:22:41,089 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-06 11:22:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:41,090 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 11:22:41,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 11:22:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 11:22:41,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:41,090 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:41,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:22:41,090 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 20 times [2021-05-06 11:22:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583694748] [2021-05-06 11:22:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:41,101 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:41,101 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:41,102 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:41,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:41,341 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:41,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583694748] [2021-05-06 11:22:41,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [583694748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:41,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:41,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-06 11:22:41,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500772030] [2021-05-06 11:22:41,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 11:22:41,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 11:22:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:22:41,342 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:41,447 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 11:22:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 11:22:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 11:22:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:41,449 INFO L225 Difference]: With dead ends: 62 [2021-05-06 11:22:41,449 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 11:22:41,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:22:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 11:22:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 11:22:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 11:22:41,452 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-06 11:22:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:41,452 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 11:22:41,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 11:22:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 11:22:41,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:41,452 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:41,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 11:22:41,452 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 21 times [2021-05-06 11:22:41,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:41,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701119026] [2021-05-06 11:22:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:41,459 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:41,459 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:41,460 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:41,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:41,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:41,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701119026] [2021-05-06 11:22:41,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701119026] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:41,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:41,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-06 11:22:41,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182567063] [2021-05-06 11:22:41,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 11:22:41,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 11:22:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:22:41,709 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:41,775 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 11:22:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 11:22:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 11:22:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:41,776 INFO L225 Difference]: With dead ends: 64 [2021-05-06 11:22:41,776 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 11:22:41,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:22:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 11:22:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 11:22:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 11:22:41,779 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-06 11:22:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:41,779 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 11:22:41,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 11:22:41,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 11:22:41,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:41,779 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:41,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:22:41,779 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 22 times [2021-05-06 11:22:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:41,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661229135] [2021-05-06 11:22:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:41,784 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:41,784 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:41,785 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:42,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:42,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661229135] [2021-05-06 11:22:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661229135] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:42,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:42,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 11:22:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832103778] [2021-05-06 11:22:42,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 11:22:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 11:22:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:22:42,083 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:42,155 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 11:22:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 11:22:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 11:22:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:42,155 INFO L225 Difference]: With dead ends: 66 [2021-05-06 11:22:42,156 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 11:22:42,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 11:22:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 11:22:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 11:22:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 11:22:42,158 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-06 11:22:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:42,158 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 11:22:42,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 11:22:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 11:22:42,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:42,159 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:42,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 11:22:42,159 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 23 times [2021-05-06 11:22:42,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:42,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150560023] [2021-05-06 11:22:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:42,167 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:42,167 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:42,169 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:42,476 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:42,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150560023] [2021-05-06 11:22:42,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [150560023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:42,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:42,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-06 11:22:42,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691637087] [2021-05-06 11:22:42,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 11:22:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:42,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 11:22:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:22:42,477 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:42,560 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 11:22:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 11:22:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 11:22:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:42,561 INFO L225 Difference]: With dead ends: 68 [2021-05-06 11:22:42,561 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 11:22:42,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:22:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 11:22:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 11:22:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 11:22:42,564 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-06 11:22:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:42,564 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 11:22:42,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 11:22:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 11:22:42,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:42,569 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:42,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 11:22:42,569 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 24 times [2021-05-06 11:22:42,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:42,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213404612] [2021-05-06 11:22:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:42,573 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:42,573 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:42,575 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:42,876 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:42,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213404612] [2021-05-06 11:22:42,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [213404612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:42,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:42,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-06 11:22:42,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210681173] [2021-05-06 11:22:42,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 11:22:42,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:42,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 11:22:42,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:22:42,881 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:42,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:42,997 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 11:22:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 11:22:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 11:22:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:42,998 INFO L225 Difference]: With dead ends: 70 [2021-05-06 11:22:42,998 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 11:22:42,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 11:22:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 11:22:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 11:22:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 11:22:43,000 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-06 11:22:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:43,000 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 11:22:43,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 11:22:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 11:22:43,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:43,001 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:43,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 11:22:43,001 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 25 times [2021-05-06 11:22:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:43,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113408876] [2021-05-06 11:22:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:43,007 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:43,007 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:43,008 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:43,340 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:43,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113408876] [2021-05-06 11:22:43,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113408876] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:43,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:43,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-06 11:22:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171069473] [2021-05-06 11:22:43,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 11:22:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 11:22:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:22:43,341 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:43,428 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 11:22:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 11:22:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 11:22:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:43,429 INFO L225 Difference]: With dead ends: 72 [2021-05-06 11:22:43,429 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 11:22:43,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 11:22:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 11:22:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-06 11:22:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 11:22:43,432 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-06 11:22:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:43,432 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 11:22:43,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 11:22:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 11:22:43,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:43,433 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:43,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-06 11:22:43,433 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 26 times [2021-05-06 11:22:43,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:43,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739439101] [2021-05-06 11:22:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:43,438 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:43,438 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:43,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:43,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:43,777 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:43,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739439101] [2021-05-06 11:22:43,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739439101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:43,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:43,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-06 11:22:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792599624] [2021-05-06 11:22:43,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 11:22:43,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:43,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 11:22:43,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:22:43,779 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:43,847 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 11:22:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 11:22:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 11:22:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:43,848 INFO L225 Difference]: With dead ends: 74 [2021-05-06 11:22:43,848 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 11:22:43,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:22:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 11:22:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-06 11:22:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 11:22:43,850 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-06 11:22:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:43,850 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 11:22:43,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 11:22:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 11:22:43,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:43,851 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:43,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-06 11:22:43,851 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 27 times [2021-05-06 11:22:43,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:43,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663358150] [2021-05-06 11:22:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:43,856 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:43,856 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:43,857 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:44,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:44,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:44,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663358150] [2021-05-06 11:22:44,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663358150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:44,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:44,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-06 11:22:44,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17520491] [2021-05-06 11:22:44,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 11:22:44,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:44,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 11:22:44,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:22:44,198 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:44,266 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 11:22:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 11:22:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 11:22:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:44,267 INFO L225 Difference]: With dead ends: 76 [2021-05-06 11:22:44,267 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 11:22:44,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 11:22:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 11:22:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-06 11:22:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 11:22:44,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-06 11:22:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 11:22:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 11:22:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 11:22:44,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:44,270 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:44,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-06 11:22:44,270 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 28 times [2021-05-06 11:22:44,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:44,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833401780] [2021-05-06 11:22:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:44,275 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:44,275 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:44,276 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:44,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:44,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:44,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833401780] [2021-05-06 11:22:44,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [833401780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:44,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:44,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-06 11:22:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017628736] [2021-05-06 11:22:44,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 11:22:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 11:22:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:22:44,604 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:44,672 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 11:22:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 11:22:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 11:22:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:44,673 INFO L225 Difference]: With dead ends: 78 [2021-05-06 11:22:44,673 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 11:22:44,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 11:22:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 11:22:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-06 11:22:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 11:22:44,676 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-06 11:22:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:44,676 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 11:22:44,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 11:22:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 11:22:44,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:44,677 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:44,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-06 11:22:44,677 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 29 times [2021-05-06 11:22:44,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:44,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167085481] [2021-05-06 11:22:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:44,680 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:44,681 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:44,682 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:45,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:45,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:45,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167085481] [2021-05-06 11:22:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167085481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-06 11:22:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073166286] [2021-05-06 11:22:45,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 11:22:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 11:22:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:22:45,116 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:45,212 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 11:22:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 11:22:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 11:22:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:45,212 INFO L225 Difference]: With dead ends: 80 [2021-05-06 11:22:45,212 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 11:22:45,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 11:22:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 11:22:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 11:22:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 11:22:45,215 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-06 11:22:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:45,215 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 11:22:45,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 11:22:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 11:22:45,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:45,216 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:45,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-06 11:22:45,216 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 30 times [2021-05-06 11:22:45,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:45,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452928645] [2021-05-06 11:22:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:45,220 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:45,220 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:45,221 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:45,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:45,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452928645] [2021-05-06 11:22:45,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452928645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:45,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:45,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-06 11:22:45,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283208376] [2021-05-06 11:22:45,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 11:22:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 11:22:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:22:45,628 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:45,752 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 11:22:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 11:22:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 11:22:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:45,753 INFO L225 Difference]: With dead ends: 82 [2021-05-06 11:22:45,753 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 11:22:45,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 11:22:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 11:22:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 11:22:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 11:22:45,755 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-06 11:22:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:45,755 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 11:22:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 11:22:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 11:22:45,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:45,756 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:45,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-06 11:22:45,756 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 31 times [2021-05-06 11:22:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915129487] [2021-05-06 11:22:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:45,760 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:45,760 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:45,761 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:46,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:46,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915129487] [2021-05-06 11:22:46,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915129487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:46,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:46,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-06 11:22:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107217774] [2021-05-06 11:22:46,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 11:22:46,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 11:22:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:22:46,138 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:46,216 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 11:22:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 11:22:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 11:22:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:46,217 INFO L225 Difference]: With dead ends: 84 [2021-05-06 11:22:46,217 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 11:22:46,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 11:22:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 11:22:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-06 11:22:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 11:22:46,220 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-06 11:22:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:46,221 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 11:22:46,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 11:22:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 11:22:46,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:46,221 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:46,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-06 11:22:46,221 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 32 times [2021-05-06 11:22:46,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:46,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583316884] [2021-05-06 11:22:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:46,233 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:46,233 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:46,234 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:46,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:46,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583316884] [2021-05-06 11:22:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583316884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:46,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:46,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-06 11:22:46,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753660342] [2021-05-06 11:22:46,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 11:22:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:46,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 11:22:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:22:46,628 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:46,745 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 11:22:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 11:22:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 11:22:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:46,746 INFO L225 Difference]: With dead ends: 86 [2021-05-06 11:22:46,746 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 11:22:46,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 11:22:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 11:22:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-06 11:22:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 11:22:46,748 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-06 11:22:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:46,749 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 11:22:46,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 11:22:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 11:22:46,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:46,749 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:46,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-06 11:22:46,749 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 33 times [2021-05-06 11:22:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:46,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742139627] [2021-05-06 11:22:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:46,768 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:46,768 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:46,769 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:47,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:47,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:47,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742139627] [2021-05-06 11:22:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742139627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:47,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-06 11:22:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818833748] [2021-05-06 11:22:47,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 11:22:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 11:22:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:22:47,262 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:47,385 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 11:22:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 11:22:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 11:22:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:47,386 INFO L225 Difference]: With dead ends: 88 [2021-05-06 11:22:47,386 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 11:22:47,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 11:22:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 11:22:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-06 11:22:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 11:22:47,389 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-06 11:22:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:47,389 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 11:22:47,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 11:22:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 11:22:47,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:47,389 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:47,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-06 11:22:47,390 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 34 times [2021-05-06 11:22:47,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:47,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201831881] [2021-05-06 11:22:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:47,394 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:47,394 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:47,395 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:47,893 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201831881] [2021-05-06 11:22:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [201831881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:47,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-06 11:22:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829329535] [2021-05-06 11:22:47,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 11:22:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 11:22:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:22:47,894 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:48,054 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 11:22:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 11:22:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 11:22:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:48,055 INFO L225 Difference]: With dead ends: 90 [2021-05-06 11:22:48,055 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 11:22:48,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 11:22:48,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 11:22:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-06 11:22:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 11:22:48,059 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-06 11:22:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:48,059 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 11:22:48,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 11:22:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 11:22:48,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:48,059 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:48,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-06 11:22:48,060 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 35 times [2021-05-06 11:22:48,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:48,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858465107] [2021-05-06 11:22:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:48,064 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:48,064 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:48,065 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:48,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:48,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858465107] [2021-05-06 11:22:48,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858465107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:48,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:48,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-06 11:22:48,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321861512] [2021-05-06 11:22:48,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 11:22:48,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:48,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 11:22:48,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:22:48,605 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:48,754 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 11:22:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 11:22:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 11:22:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:48,755 INFO L225 Difference]: With dead ends: 92 [2021-05-06 11:22:48,755 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 11:22:48,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 11:22:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 11:22:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-06 11:22:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 11:22:48,758 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-06 11:22:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:48,758 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 11:22:48,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 11:22:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 11:22:48,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:48,759 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:48,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-06 11:22:48,759 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:48,759 INFO L82 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 36 times [2021-05-06 11:22:48,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:48,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752162693] [2021-05-06 11:22:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:48,764 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:48,764 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:48,765 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:49,299 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:49,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752162693] [2021-05-06 11:22:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752162693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-06 11:22:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205097019] [2021-05-06 11:22:49,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 11:22:49,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 11:22:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:22:49,301 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:49,446 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 11:22:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 11:22:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 11:22:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:49,447 INFO L225 Difference]: With dead ends: 94 [2021-05-06 11:22:49,447 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 11:22:49,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 11:22:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 11:22:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-06 11:22:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 11:22:49,450 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-06 11:22:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:49,450 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 11:22:49,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 11:22:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 11:22:49,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:49,450 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:49,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-06 11:22:49,450 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 37 times [2021-05-06 11:22:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:49,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191253900] [2021-05-06 11:22:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:49,455 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:49,455 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:49,456 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:50,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:50,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:50,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191253900] [2021-05-06 11:22:50,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191253900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:50,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:50,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-06 11:22:50,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124590064] [2021-05-06 11:22:50,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 11:22:50,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:50,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 11:22:50,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:22:50,006 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:50,096 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 11:22:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 11:22:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 11:22:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:50,102 INFO L225 Difference]: With dead ends: 96 [2021-05-06 11:22:50,102 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 11:22:50,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 11:22:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 11:22:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-06 11:22:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 11:22:50,104 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-06 11:22:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:50,104 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 11:22:50,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 11:22:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 11:22:50,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:50,105 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:50,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-06 11:22:50,105 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 38 times [2021-05-06 11:22:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:50,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44339241] [2021-05-06 11:22:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:50,109 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:50,109 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:50,110 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:50,703 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:50,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44339241] [2021-05-06 11:22:50,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [44339241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:50,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:50,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-06 11:22:50,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088617886] [2021-05-06 11:22:50,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 11:22:50,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 11:22:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:22:50,704 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:50,857 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 11:22:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 11:22:50,857 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 11:22:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:50,858 INFO L225 Difference]: With dead ends: 98 [2021-05-06 11:22:50,858 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 11:22:50,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 11:22:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 11:22:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 11:22:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 11:22:50,860 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-06 11:22:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:50,860 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 11:22:50,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 11:22:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 11:22:50,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:50,867 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:50,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-06 11:22:50,867 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 39 times [2021-05-06 11:22:50,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:50,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014807658] [2021-05-06 11:22:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:50,872 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:50,872 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:50,873 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:51,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:51,474 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:51,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014807658] [2021-05-06 11:22:51,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2014807658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:51,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:51,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-06 11:22:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344499886] [2021-05-06 11:22:51,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 11:22:51,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 11:22:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:22:51,475 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:51,588 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 11:22:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 11:22:51,589 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 11:22:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:51,589 INFO L225 Difference]: With dead ends: 100 [2021-05-06 11:22:51,589 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 11:22:51,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 11:22:51,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 11:22:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-06 11:22:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 11:22:51,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-06 11:22:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:51,592 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 11:22:51,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 11:22:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 11:22:51,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:51,593 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:51,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-06 11:22:51,593 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:51,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 40 times [2021-05-06 11:22:51,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:51,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225324325] [2021-05-06 11:22:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:51,599 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:51,599 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:51,599 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:52,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:52,229 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:52,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225324325] [2021-05-06 11:22:52,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [225324325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:52,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:52,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-06 11:22:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608003923] [2021-05-06 11:22:52,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 11:22:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:52,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 11:22:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:22:52,231 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:52,352 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 11:22:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 11:22:52,352 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 11:22:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:52,352 INFO L225 Difference]: With dead ends: 102 [2021-05-06 11:22:52,353 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 11:22:52,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 11:22:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 11:22:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-06 11:22:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 11:22:52,355 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-06 11:22:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:52,356 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 11:22:52,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 11:22:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 11:22:52,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:52,356 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:52,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-06 11:22:52,356 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 41 times [2021-05-06 11:22:52,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:52,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855302301] [2021-05-06 11:22:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:52,361 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:52,361 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:52,362 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:53,021 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:53,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855302301] [2021-05-06 11:22:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855302301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:53,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:53,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-06 11:22:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632620994] [2021-05-06 11:22:53,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 11:22:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 11:22:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:22:53,022 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:53,203 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 11:22:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 11:22:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 11:22:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:53,204 INFO L225 Difference]: With dead ends: 104 [2021-05-06 11:22:53,204 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 11:22:53,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 11:22:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 11:22:53,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-06 11:22:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 11:22:53,210 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-06 11:22:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:53,211 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 11:22:53,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 11:22:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 11:22:53,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:53,213 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:53,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-06 11:22:53,213 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 42 times [2021-05-06 11:22:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154323684] [2021-05-06 11:22:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:53,217 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:53,217 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:53,218 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:53,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:53,929 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:53,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154323684] [2021-05-06 11:22:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154323684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-06 11:22:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317564341] [2021-05-06 11:22:53,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 11:22:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 11:22:53,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:22:53,930 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:54,119 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 11:22:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 11:22:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 11:22:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:54,120 INFO L225 Difference]: With dead ends: 106 [2021-05-06 11:22:54,120 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 11:22:54,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 11:22:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 11:22:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-06 11:22:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 11:22:54,122 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-06 11:22:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:54,122 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 11:22:54,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 11:22:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 11:22:54,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:54,123 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:54,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-06 11:22:54,123 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 43 times [2021-05-06 11:22:54,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:54,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378023578] [2021-05-06 11:22:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:54,127 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:54,128 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:54,128 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:54,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:54,892 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:54,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378023578] [2021-05-06 11:22:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [378023578] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:54,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:54,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-06 11:22:54,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267849527] [2021-05-06 11:22:54,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 11:22:54,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 11:22:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:22:54,893 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:55,012 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 11:22:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 11:22:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 11:22:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:55,013 INFO L225 Difference]: With dead ends: 108 [2021-05-06 11:22:55,013 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 11:22:55,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 11:22:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 11:22:55,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-06 11:22:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 11:22:55,016 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-06 11:22:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:55,016 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 11:22:55,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 11:22:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 11:22:55,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:55,016 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:55,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-06 11:22:55,017 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 44 times [2021-05-06 11:22:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778302037] [2021-05-06 11:22:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:55,022 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:55,022 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:55,023 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:55,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:55,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:55,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778302037] [2021-05-06 11:22:55,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1778302037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:55,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:55,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-06 11:22:55,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109596915] [2021-05-06 11:22:55,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 11:22:55,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:55,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 11:22:55,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:22:55,791 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:55,965 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-06 11:22:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 11:22:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 11:22:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:55,966 INFO L225 Difference]: With dead ends: 110 [2021-05-06 11:22:55,966 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 11:22:55,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 11:22:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 11:22:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 11:22:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 11:22:55,968 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-06 11:22:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:55,968 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 11:22:55,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 11:22:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 11:22:55,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:55,969 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:55,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-06 11:22:55,969 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 45 times [2021-05-06 11:22:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:55,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004345217] [2021-05-06 11:22:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:55,973 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:55,974 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:55,974 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:56,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:56,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:56,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004345217] [2021-05-06 11:22:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004345217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-06 11:22:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649928158] [2021-05-06 11:22:56,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 11:22:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:56,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 11:22:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:22:56,782 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:56,960 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-06 11:22:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 11:22:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-06 11:22:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:56,961 INFO L225 Difference]: With dead ends: 112 [2021-05-06 11:22:56,961 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 11:22:56,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 11:22:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 11:22:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-06 11:22:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-06 11:22:56,963 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-06 11:22:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:56,963 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-06 11:22:56,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-06 11:22:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 11:22:56,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:56,964 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:56,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-06 11:22:56,964 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 46 times [2021-05-06 11:22:56,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:56,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018559003] [2021-05-06 11:22:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:56,972 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:56,972 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:56,973 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:57,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:57,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018559003] [2021-05-06 11:22:57,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018559003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:57,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:57,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-06 11:22:57,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733509833] [2021-05-06 11:22:57,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 11:22:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 11:22:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:22:57,791 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:57,937 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-06 11:22:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 11:22:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-06 11:22:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:57,938 INFO L225 Difference]: With dead ends: 114 [2021-05-06 11:22:57,938 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 11:22:57,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 11:22:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 11:22:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 11:22:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-06 11:22:57,940 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-06 11:22:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:57,941 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-06 11:22:57,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-06 11:22:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 11:22:57,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:57,941 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:57,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-06 11:22:57,941 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:57,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 47 times [2021-05-06 11:22:57,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:57,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976022703] [2021-05-06 11:22:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:57,945 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:57,945 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:57,946 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:58,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:58,815 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976022703] [2021-05-06 11:22:58,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [976022703] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:58,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:58,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-06 11:22:58,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421675331] [2021-05-06 11:22:58,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 11:22:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 11:22:58,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:22:58,816 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:22:58,967 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-06 11:22:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 11:22:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-06 11:22:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:22:58,968 INFO L225 Difference]: With dead ends: 116 [2021-05-06 11:22:58,968 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 11:22:58,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 827.2ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 11:22:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 11:22:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-06 11:22:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-06 11:22:58,971 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-06 11:22:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:22:58,971 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-06 11:22:58,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:22:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-06 11:22:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 11:22:58,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:22:58,972 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:22:58,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-06 11:22:58,972 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:22:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:22:58,972 INFO L82 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 48 times [2021-05-06 11:22:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:22:58,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145523286] [2021-05-06 11:22:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:22:58,977 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:22:58,978 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:22:58,978 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:22:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:22:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:22:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:22:59,881 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:22:59,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145523286] [2021-05-06 11:22:59,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [145523286] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:22:59,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:22:59,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-06 11:22:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302794792] [2021-05-06 11:22:59,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 11:22:59,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:22:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 11:22:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:22:59,882 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:00,005 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-06 11:23:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 11:23:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-06 11:23:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:00,006 INFO L225 Difference]: With dead ends: 118 [2021-05-06 11:23:00,006 INFO L226 Difference]: Without dead ends: 112 [2021-05-06 11:23:00,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 11:23:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-06 11:23:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-06 11:23:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-06 11:23:00,008 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-06 11:23:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:00,009 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-06 11:23:00,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-06 11:23:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 11:23:00,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:00,009 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:00,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-06 11:23:00,009 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 49 times [2021-05-06 11:23:00,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:00,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292550658] [2021-05-06 11:23:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:00,014 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:00,014 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:00,015 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:00,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:00,921 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:00,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292550658] [2021-05-06 11:23:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292550658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-06 11:23:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022587252] [2021-05-06 11:23:00,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 11:23:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 11:23:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:23:00,923 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:01,062 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-06 11:23:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 11:23:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-06 11:23:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:01,063 INFO L225 Difference]: With dead ends: 120 [2021-05-06 11:23:01,063 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 11:23:01,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 11:23:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 11:23:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-06 11:23:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-06 11:23:01,066 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-06 11:23:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:01,066 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-06 11:23:01,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-06 11:23:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 11:23:01,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:01,066 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:01,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-06 11:23:01,066 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 50 times [2021-05-06 11:23:01,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:01,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869422160] [2021-05-06 11:23:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:01,070 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:01,070 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:01,071 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:02,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:02,024 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:02,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869422160] [2021-05-06 11:23:02,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869422160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:02,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:02,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-06 11:23:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127872335] [2021-05-06 11:23:02,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 11:23:02,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 11:23:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:23:02,025 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:02,163 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-06 11:23:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 11:23:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-06 11:23:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:02,163 INFO L225 Difference]: With dead ends: 122 [2021-05-06 11:23:02,164 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 11:23:02,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 11:23:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 11:23:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-06 11:23:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-06 11:23:02,166 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-06 11:23:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:02,166 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-06 11:23:02,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-06 11:23:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 11:23:02,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:02,167 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:02,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-06 11:23:02,167 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 51 times [2021-05-06 11:23:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:02,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104904863] [2021-05-06 11:23:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:02,170 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:02,170 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:02,171 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:03,134 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104904863] [2021-05-06 11:23:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [104904863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:03,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:03,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-06 11:23:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800231795] [2021-05-06 11:23:03,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 11:23:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 11:23:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:23:03,135 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:03,308 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-06 11:23:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 11:23:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-06 11:23:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:03,309 INFO L225 Difference]: With dead ends: 124 [2021-05-06 11:23:03,309 INFO L226 Difference]: Without dead ends: 118 [2021-05-06 11:23:03,310 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 11:23:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-06 11:23:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-06 11:23:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-06 11:23:03,312 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-06 11:23:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:03,312 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-06 11:23:03,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-06 11:23:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 11:23:03,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:03,313 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:03,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-06 11:23:03,313 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 52 times [2021-05-06 11:23:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766982561] [2021-05-06 11:23:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:03,328 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:03,328 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:03,329 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:04,363 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:04,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766982561] [2021-05-06 11:23:04,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766982561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:04,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:04,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-06 11:23:04,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858591122] [2021-05-06 11:23:04,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 11:23:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 11:23:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:23:04,365 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:04,550 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-06 11:23:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 11:23:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-06 11:23:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:04,551 INFO L225 Difference]: With dead ends: 126 [2021-05-06 11:23:04,551 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 11:23:04,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 984.3ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 11:23:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 11:23:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-06 11:23:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-06 11:23:04,553 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-06 11:23:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:04,554 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-06 11:23:04,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-06 11:23:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 11:23:04,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:04,554 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:04,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-06 11:23:04,554 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 53 times [2021-05-06 11:23:04,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:04,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135384886] [2021-05-06 11:23:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:04,558 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:04,559 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:04,559 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:05,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135384886] [2021-05-06 11:23:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [135384886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:05,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:05,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-06 11:23:05,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908923113] [2021-05-06 11:23:05,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 11:23:05,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 11:23:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:23:05,627 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:05,820 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-06 11:23:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 11:23:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-06 11:23:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:05,821 INFO L225 Difference]: With dead ends: 128 [2021-05-06 11:23:05,821 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 11:23:05,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 11:23:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 11:23:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-06 11:23:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-06 11:23:05,824 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-06 11:23:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:05,824 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-06 11:23:05,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-06 11:23:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-06 11:23:05,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:05,825 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:05,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-06 11:23:05,825 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 54 times [2021-05-06 11:23:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:05,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396480523] [2021-05-06 11:23:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:05,829 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:05,829 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:05,830 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:06,952 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396480523] [2021-05-06 11:23:06,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [396480523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:06,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:06,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-06 11:23:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416239752] [2021-05-06 11:23:06,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 11:23:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 11:23:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:23:06,954 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:07,136 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-06 11:23:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 11:23:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-06 11:23:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:07,137 INFO L225 Difference]: With dead ends: 130 [2021-05-06 11:23:07,137 INFO L226 Difference]: Without dead ends: 124 [2021-05-06 11:23:07,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 11:23:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-06 11:23:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-06 11:23:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-06 11:23:07,140 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-06 11:23:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:07,140 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-06 11:23:07,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-06 11:23:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 11:23:07,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:07,144 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:07,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-06 11:23:07,145 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 55 times [2021-05-06 11:23:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:07,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872057820] [2021-05-06 11:23:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:07,160 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:07,160 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:07,162 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:08,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872057820] [2021-05-06 11:23:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [872057820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:08,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:08,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-06 11:23:08,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66197859] [2021-05-06 11:23:08,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 11:23:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 11:23:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:23:08,338 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:08,539 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-06 11:23:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 11:23:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-06 11:23:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:08,540 INFO L225 Difference]: With dead ends: 132 [2021-05-06 11:23:08,541 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 11:23:08,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1099.4ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 11:23:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 11:23:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-06 11:23:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-06 11:23:08,543 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-06 11:23:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:08,543 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-06 11:23:08,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-06 11:23:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 11:23:08,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:08,544 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:08,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-06 11:23:08,544 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 56 times [2021-05-06 11:23:08,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:08,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717841811] [2021-05-06 11:23:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:08,555 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:08,555 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:08,556 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:09,751 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:09,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717841811] [2021-05-06 11:23:09,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717841811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:09,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:09,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-06 11:23:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109323667] [2021-05-06 11:23:09,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 11:23:09,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 11:23:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:23:09,752 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:09,910 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-06 11:23:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 11:23:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-06 11:23:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:09,911 INFO L225 Difference]: With dead ends: 134 [2021-05-06 11:23:09,911 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 11:23:09,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1133.7ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 11:23:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 11:23:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-06 11:23:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-06 11:23:09,914 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-06 11:23:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:09,914 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-06 11:23:09,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-06 11:23:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-06 11:23:09,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:09,915 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:09,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-06 11:23:09,915 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 57 times [2021-05-06 11:23:09,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:09,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707944034] [2021-05-06 11:23:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:09,919 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:09,919 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:09,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:11,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:11,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707944034] [2021-05-06 11:23:11,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1707944034] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:11,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:11,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-06 11:23:11,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381972654] [2021-05-06 11:23:11,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 11:23:11,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:11,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 11:23:11,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:23:11,138 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:11,354 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-06 11:23:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 11:23:11,354 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-06 11:23:11,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:11,355 INFO L225 Difference]: With dead ends: 136 [2021-05-06 11:23:11,355 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 11:23:11,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1158.1ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 11:23:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 11:23:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-06 11:23:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-06 11:23:11,357 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-06 11:23:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:11,357 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-06 11:23:11,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-06 11:23:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 11:23:11,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:11,358 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:11,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-06 11:23:11,358 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 58 times [2021-05-06 11:23:11,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:11,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852754153] [2021-05-06 11:23:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:11,365 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:11,365 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:11,366 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:12,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:12,647 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852754153] [2021-05-06 11:23:12,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852754153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:12,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:12,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-06 11:23:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381949010] [2021-05-06 11:23:12,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 11:23:12,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 11:23:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:23:12,648 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:12,878 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-06 11:23:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 11:23:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-06 11:23:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:12,879 INFO L225 Difference]: With dead ends: 138 [2021-05-06 11:23:12,879 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 11:23:12,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1222.4ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 11:23:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 11:23:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-06 11:23:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-06 11:23:12,882 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-06 11:23:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:12,882 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-06 11:23:12,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-06 11:23:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 11:23:12,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:12,883 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:12,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-06 11:23:12,883 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 59 times [2021-05-06 11:23:12,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:12,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746041470] [2021-05-06 11:23:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:12,887 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:12,887 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:12,888 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:14,228 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:14,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746041470] [2021-05-06 11:23:14,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [746041470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:14,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:14,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-06 11:23:14,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735823615] [2021-05-06 11:23:14,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 11:23:14,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 11:23:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:23:14,229 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:14,375 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-06 11:23:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 11:23:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-06 11:23:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:14,376 INFO L225 Difference]: With dead ends: 140 [2021-05-06 11:23:14,376 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 11:23:14,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1283.3ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 11:23:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 11:23:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-06 11:23:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-06 11:23:14,378 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-06 11:23:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:14,378 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-06 11:23:14,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-06 11:23:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 11:23:14,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:14,379 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:14,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-06 11:23:14,379 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:14,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:14,379 INFO L82 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 60 times [2021-05-06 11:23:14,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956055647] [2021-05-06 11:23:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:14,385 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:14,385 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:14,386 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:15,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:15,730 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:15,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956055647] [2021-05-06 11:23:15,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956055647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:15,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:15,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-06 11:23:15,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669299929] [2021-05-06 11:23:15,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 11:23:15,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 11:23:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:23:15,731 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:15,979 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-06 11:23:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 11:23:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-06 11:23:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:15,980 INFO L225 Difference]: With dead ends: 142 [2021-05-06 11:23:15,980 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 11:23:15,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1290.0ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 11:23:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 11:23:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-06 11:23:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-06 11:23:15,984 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-06 11:23:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:15,984 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-06 11:23:15,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-06 11:23:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 11:23:15,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:15,986 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:15,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-06 11:23:15,986 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 61 times [2021-05-06 11:23:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:15,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194321460] [2021-05-06 11:23:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:15,990 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:15,990 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:15,996 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:17,407 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:17,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194321460] [2021-05-06 11:23:17,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194321460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:17,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:17,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-06 11:23:17,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490940857] [2021-05-06 11:23:17,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 11:23:17,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 11:23:17,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:23:17,408 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:17,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:17,633 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-06 11:23:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 11:23:17,634 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-06 11:23:17,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:17,634 INFO L225 Difference]: With dead ends: 144 [2021-05-06 11:23:17,634 INFO L226 Difference]: Without dead ends: 138 [2021-05-06 11:23:17,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1342.2ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 11:23:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-06 11:23:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-06 11:23:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-06 11:23:17,637 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-06 11:23:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:17,637 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-06 11:23:17,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-06 11:23:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-06 11:23:17,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:17,642 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:17,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-06 11:23:17,642 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 62 times [2021-05-06 11:23:17,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:17,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256516687] [2021-05-06 11:23:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:17,646 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:17,646 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:17,647 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:19,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:19,112 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:19,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256516687] [2021-05-06 11:23:19,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [256516687] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:19,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:19,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-06 11:23:19,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257869248] [2021-05-06 11:23:19,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 11:23:19,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 11:23:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:23:19,115 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:19,348 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-06 11:23:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 11:23:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-06 11:23:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:19,349 INFO L225 Difference]: With dead ends: 146 [2021-05-06 11:23:19,349 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 11:23:19,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1406.7ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 11:23:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 11:23:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-06 11:23:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-06 11:23:19,351 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-06 11:23:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:19,352 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-06 11:23:19,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-06 11:23:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 11:23:19,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:19,352 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:19,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-06 11:23:19,352 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 63 times [2021-05-06 11:23:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:19,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874195519] [2021-05-06 11:23:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:19,356 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:19,356 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:19,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:20,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:20,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:20,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874195519] [2021-05-06 11:23:20,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874195519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:20,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:20,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-06 11:23:20,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266319358] [2021-05-06 11:23:20,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 11:23:20,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:20,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 11:23:20,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:23:20,833 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:21,064 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-06 11:23:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 11:23:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-06 11:23:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:21,065 INFO L225 Difference]: With dead ends: 148 [2021-05-06 11:23:21,065 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 11:23:21,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1422.0ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 11:23:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 11:23:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-06 11:23:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-06 11:23:21,067 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-06 11:23:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:21,067 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-06 11:23:21,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-06 11:23:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 11:23:21,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:21,068 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:21,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-06 11:23:21,068 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 64 times [2021-05-06 11:23:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480971710] [2021-05-06 11:23:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:21,072 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:21,072 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:21,073 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:22,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:22,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480971710] [2021-05-06 11:23:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480971710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:22,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:22,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-06 11:23:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584409125] [2021-05-06 11:23:22,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 11:23:22,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 11:23:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:23:22,611 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:22,847 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-06 11:23:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 11:23:22,847 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-06 11:23:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:22,848 INFO L225 Difference]: With dead ends: 150 [2021-05-06 11:23:22,848 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 11:23:22,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1468.8ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 11:23:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 11:23:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-05-06 11:23:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-06 11:23:22,851 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-06 11:23:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:22,851 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-06 11:23:22,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-06 11:23:22,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 11:23:22,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:22,852 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:22,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-06 11:23:22,852 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:22,852 INFO L82 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 65 times [2021-05-06 11:23:22,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:22,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157153434] [2021-05-06 11:23:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:22,858 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:22,858 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:22,859 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:24,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:24,405 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157153434] [2021-05-06 11:23:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [157153434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:24,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-06 11:23:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996010779] [2021-05-06 11:23:24,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 11:23:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 11:23:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:23:24,406 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:24,663 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-06 11:23:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 11:23:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-06 11:23:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:24,664 INFO L225 Difference]: With dead ends: 152 [2021-05-06 11:23:24,664 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 11:23:24,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1487.4ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 11:23:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 11:23:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-06 11:23:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-06 11:23:24,667 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-06 11:23:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:24,667 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-06 11:23:24,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-06 11:23:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-06 11:23:24,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:24,667 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:24,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-06 11:23:24,668 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 66 times [2021-05-06 11:23:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:24,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802350595] [2021-05-06 11:23:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:24,674 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:24,674 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:24,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:26,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:26,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:26,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802350595] [2021-05-06 11:23:26,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [802350595] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:26,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:26,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-06 11:23:26,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225262124] [2021-05-06 11:23:26,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 11:23:26,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 11:23:26,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:23:26,249 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:26,443 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-06 11:23:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 11:23:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-06 11:23:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:26,444 INFO L225 Difference]: With dead ends: 154 [2021-05-06 11:23:26,444 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 11:23:26,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1521.7ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 11:23:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 11:23:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-06 11:23:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-06 11:23:26,447 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-06 11:23:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:26,447 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-06 11:23:26,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-06 11:23:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 11:23:26,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:26,448 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:26,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-06 11:23:26,448 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1034597152, now seen corresponding path program 67 times [2021-05-06 11:23:26,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:26,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238821977] [2021-05-06 11:23:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:26,451 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:26,451 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:26,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:28,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:28,147 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:28,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238821977] [2021-05-06 11:23:28,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238821977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:28,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:28,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-06 11:23:28,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226005668] [2021-05-06 11:23:28,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 11:23:28,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 11:23:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:23:28,149 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:28,385 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-06 11:23:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 11:23:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-06 11:23:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:28,386 INFO L225 Difference]: With dead ends: 156 [2021-05-06 11:23:28,387 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 11:23:28,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1636.8ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 11:23:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 11:23:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-06 11:23:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-06 11:23:28,389 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-06 11:23:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:28,389 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-06 11:23:28,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-06 11:23:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 11:23:28,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:28,390 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:28,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-06 11:23:28,390 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1236330306, now seen corresponding path program 68 times [2021-05-06 11:23:28,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:28,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339476615] [2021-05-06 11:23:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:28,394 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:28,394 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:28,394 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:30,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:30,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:30,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339476615] [2021-05-06 11:23:30,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339476615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:30,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:30,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-06 11:23:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922470176] [2021-05-06 11:23:30,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 11:23:30,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 11:23:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:23:30,085 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:30,363 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-06 11:23:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 11:23:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-06 11:23:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:30,364 INFO L225 Difference]: With dead ends: 158 [2021-05-06 11:23:30,364 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 11:23:30,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1619.2ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 11:23:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 11:23:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-06 11:23:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-06 11:23:30,370 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-06 11:23:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:30,370 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-06 11:23:30,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-06 11:23:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-06 11:23:30,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:30,371 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:30,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-06 11:23:30,371 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1828362980, now seen corresponding path program 69 times [2021-05-06 11:23:30,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:30,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575786490] [2021-05-06 11:23:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:30,380 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:30,380 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:30,380 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:32,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:32,153 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:32,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575786490] [2021-05-06 11:23:32,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [575786490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:32,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:32,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-06 11:23:32,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065765606] [2021-05-06 11:23:32,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 11:23:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 11:23:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:23:32,155 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:32,329 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-06 11:23:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 11:23:32,329 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-06 11:23:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:32,330 INFO L225 Difference]: With dead ends: 160 [2021-05-06 11:23:32,330 INFO L226 Difference]: Without dead ends: 154 [2021-05-06 11:23:32,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1696.7ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 11:23:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-06 11:23:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-06 11:23:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-06 11:23:32,333 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-06 11:23:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:32,333 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-06 11:23:32,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-06 11:23:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-06 11:23:32,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:32,333 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:32,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-06 11:23:32,334 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:32,334 INFO L82 PathProgramCache]: Analyzing trace with hash -458887674, now seen corresponding path program 70 times [2021-05-06 11:23:32,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:32,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445634653] [2021-05-06 11:23:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:32,337 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:32,337 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:32,338 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:34,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:34,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445634653] [2021-05-06 11:23:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [445634653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:34,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:34,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-06 11:23:34,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209058856] [2021-05-06 11:23:34,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 11:23:34,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 11:23:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:23:34,140 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:34,412 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-06 11:23:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 11:23:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-06 11:23:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:34,413 INFO L225 Difference]: With dead ends: 162 [2021-05-06 11:23:34,413 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 11:23:34,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1747.8ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 11:23:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 11:23:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 11:23:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-06 11:23:34,416 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-06 11:23:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:34,416 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-06 11:23:34,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:34,416 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-06 11:23:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 11:23:34,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:34,416 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:34,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-06 11:23:34,416 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash 516489384, now seen corresponding path program 71 times [2021-05-06 11:23:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:34,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935037272] [2021-05-06 11:23:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:34,420 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:34,420 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:34,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:36,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:36,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:36,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935037272] [2021-05-06 11:23:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935037272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:36,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:36,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-06 11:23:36,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522857055] [2021-05-06 11:23:36,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 11:23:36,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 11:23:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:23:36,358 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:36,572 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-06 11:23:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 11:23:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-06 11:23:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:36,574 INFO L225 Difference]: With dead ends: 164 [2021-05-06 11:23:36,574 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 11:23:36,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1874.8ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 11:23:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 11:23:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-06 11:23:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-06 11:23:36,580 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-06 11:23:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:36,580 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-06 11:23:36,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-06 11:23:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 11:23:36,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:36,583 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:36,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-06 11:23:36,583 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1550971594, now seen corresponding path program 72 times [2021-05-06 11:23:36,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:36,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384176889] [2021-05-06 11:23:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:36,587 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:36,587 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:36,588 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:38,847 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384176889] [2021-05-06 11:23:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [384176889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:38,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-06 11:23:38,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311064120] [2021-05-06 11:23:38,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 11:23:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 11:23:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:23:38,848 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:39,177 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-06 11:23:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 11:23:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-06 11:23:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:39,178 INFO L225 Difference]: With dead ends: 166 [2021-05-06 11:23:39,178 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 11:23:39,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2135.5ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 11:23:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 11:23:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-06 11:23:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-06 11:23:39,195 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-06 11:23:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:39,195 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-06 11:23:39,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-06 11:23:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 11:23:39,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:39,196 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-06 11:23:39,196 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -744037268, now seen corresponding path program 73 times [2021-05-06 11:23:39,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:39,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746994246] [2021-05-06 11:23:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:39,215 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:39,215 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:39,216 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:41,463 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:41,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746994246] [2021-05-06 11:23:41,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [746994246] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:41,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:41,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-06 11:23:41,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362444844] [2021-05-06 11:23:41,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 11:23:41,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 11:23:41,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:23:41,465 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:41,753 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-06 11:23:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 11:23:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-06 11:23:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:41,754 INFO L225 Difference]: With dead ends: 168 [2021-05-06 11:23:41,754 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 11:23:41,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2148.7ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 11:23:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 11:23:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-06 11:23:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-06 11:23:41,757 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-06 11:23:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:41,757 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-06 11:23:41,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-06 11:23:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 11:23:41,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:41,757 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:41,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-06 11:23:41,758 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1365636494, now seen corresponding path program 74 times [2021-05-06 11:23:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647287245] [2021-05-06 11:23:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:41,767 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:41,767 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:41,767 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:43,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:43,779 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:43,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647287245] [2021-05-06 11:23:43,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [647287245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:43,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:43,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-06 11:23:43,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635657119] [2021-05-06 11:23:43,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 11:23:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 11:23:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:23:43,780 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:44,009 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-06 11:23:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 11:23:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-06 11:23:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:44,010 INFO L225 Difference]: With dead ends: 170 [2021-05-06 11:23:44,010 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 11:23:44,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1943.3ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 11:23:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 11:23:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-06 11:23:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-06 11:23:44,013 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-06 11:23:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:44,013 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-06 11:23:44,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-06 11:23:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 11:23:44,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:44,013 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:44,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-06 11:23:44,014 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1537558064, now seen corresponding path program 75 times [2021-05-06 11:23:44,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:44,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731111257] [2021-05-06 11:23:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:44,024 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:44,024 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:44,025 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:46,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:46,163 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:46,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731111257] [2021-05-06 11:23:46,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [731111257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:46,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:46,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-06 11:23:46,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835204446] [2021-05-06 11:23:46,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 11:23:46,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 11:23:46,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:23:46,165 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:46,359 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-06 11:23:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 11:23:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-06 11:23:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:46,360 INFO L225 Difference]: With dead ends: 172 [2021-05-06 11:23:46,361 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 11:23:46,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2075.6ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 11:23:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 11:23:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-06 11:23:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-06 11:23:46,363 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-06 11:23:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:46,364 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-06 11:23:46,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-06 11:23:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-06 11:23:46,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:46,364 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:46,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-06 11:23:46,364 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash -749537710, now seen corresponding path program 76 times [2021-05-06 11:23:46,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:46,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957782242] [2021-05-06 11:23:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:46,374 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:46,374 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:46,375 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:48,486 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:48,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957782242] [2021-05-06 11:23:48,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1957782242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:48,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:48,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-06 11:23:48,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647668910] [2021-05-06 11:23:48,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 11:23:48,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 11:23:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:23:48,487 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:48,676 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-06 11:23:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 11:23:48,677 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-06 11:23:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:48,677 INFO L225 Difference]: With dead ends: 174 [2021-05-06 11:23:48,677 INFO L226 Difference]: Without dead ends: 168 [2021-05-06 11:23:48,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2046.1ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 11:23:48,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-06 11:23:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-06 11:23:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-06 11:23:48,680 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-06 11:23:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:48,680 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-06 11:23:48,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-06 11:23:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 11:23:48,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:48,681 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:48,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-06 11:23:48,681 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash 374679028, now seen corresponding path program 77 times [2021-05-06 11:23:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:48,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134973146] [2021-05-06 11:23:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:48,687 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:48,687 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:48,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:50,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:50,836 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:50,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134973146] [2021-05-06 11:23:50,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2134973146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:50,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:50,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-06 11:23:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096993734] [2021-05-06 11:23:50,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 11:23:50,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 11:23:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:23:50,837 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:51,033 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-06 11:23:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 11:23:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-06 11:23:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:51,034 INFO L225 Difference]: With dead ends: 176 [2021-05-06 11:23:51,034 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 11:23:51,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2086.7ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 11:23:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 11:23:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-05-06 11:23:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-06 11:23:51,037 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-06 11:23:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:51,037 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-06 11:23:51,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-06 11:23:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-06 11:23:51,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:51,038 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:51,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-06 11:23:51,038 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1584794346, now seen corresponding path program 78 times [2021-05-06 11:23:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:51,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280703065] [2021-05-06 11:23:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:51,041 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:51,042 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:51,042 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:53,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:53,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280703065] [2021-05-06 11:23:53,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [280703065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:53,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:53,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-06 11:23:53,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742888567] [2021-05-06 11:23:53,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 11:23:53,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 11:23:53,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:23:53,272 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:53,473 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-06 11:23:53,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 11:23:53,473 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-06 11:23:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:53,474 INFO L225 Difference]: With dead ends: 178 [2021-05-06 11:23:53,474 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 11:23:53,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2158.4ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 11:23:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 11:23:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-06 11:23:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-06 11:23:53,477 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-06 11:23:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:53,477 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-06 11:23:53,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-06 11:23:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 11:23:53,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:53,478 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:53,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-06 11:23:53,478 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash 851936184, now seen corresponding path program 79 times [2021-05-06 11:23:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435986126] [2021-05-06 11:23:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:53,482 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:53,482 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:53,482 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:55,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:55,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435986126] [2021-05-06 11:23:55,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1435986126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:55,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:55,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-06 11:23:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083129212] [2021-05-06 11:23:55,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 11:23:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 11:23:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:23:55,774 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:56,013 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-06 11:23:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 11:23:56,013 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-06 11:23:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:56,014 INFO L225 Difference]: With dead ends: 180 [2021-05-06 11:23:56,014 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 11:23:56,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2201.8ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 11:23:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 11:23:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-05-06 11:23:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-06 11:23:56,017 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-06 11:23:56,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:56,017 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-06 11:23:56,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-06 11:23:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-06 11:23:56,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:56,018 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:56,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-06 11:23:56,018 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:56,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1792799194, now seen corresponding path program 80 times [2021-05-06 11:23:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:56,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019824125] [2021-05-06 11:23:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:56,023 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:56,023 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:56,024 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:23:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:23:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:23:58,571 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:23:58,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019824125] [2021-05-06 11:23:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019824125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:23:58,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:23:58,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-06 11:23:58,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082534823] [2021-05-06 11:23:58,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 11:23:58,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:23:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 11:23:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:23:58,572 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:23:58,861 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-06 11:23:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 11:23:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-06 11:23:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:23:58,862 INFO L225 Difference]: With dead ends: 182 [2021-05-06 11:23:58,862 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 11:23:58,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2472.2ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 11:23:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 11:23:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-05-06 11:23:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-06 11:23:58,865 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-06 11:23:58,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:23:58,865 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-06 11:23:58,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:23:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-06 11:23:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 11:23:58,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:23:58,877 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:23:58,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-06 11:23:58,877 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:23:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:23:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -275947652, now seen corresponding path program 81 times [2021-05-06 11:23:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:23:58,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405662025] [2021-05-06 11:23:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:23:58,884 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:23:58,884 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:23:58,885 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:23:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:01,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:01,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:01,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405662025] [2021-05-06 11:24:01,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405662025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:01,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:01,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-06 11:24:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333558034] [2021-05-06 11:24:01,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 11:24:01,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 11:24:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:24:01,612 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:01,958 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-06 11:24:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 11:24:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-05-06 11:24:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:01,977 INFO L225 Difference]: With dead ends: 184 [2021-05-06 11:24:01,977 INFO L226 Difference]: Without dead ends: 178 [2021-05-06 11:24:01,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2626.0ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 11:24:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-06 11:24:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-05-06 11:24:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-05-06 11:24:01,980 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-05-06 11:24:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:01,980 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-05-06 11:24:01,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-05-06 11:24:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 11:24:01,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:01,981 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:01,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-06 11:24:01,981 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash 228191390, now seen corresponding path program 82 times [2021-05-06 11:24:01,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:01,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571427726] [2021-05-06 11:24:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:01,997 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:01,998 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:01,998 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:04,643 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571427726] [2021-05-06 11:24:04,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [571427726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:04,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:04,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-06 11:24:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957595726] [2021-05-06 11:24:04,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 11:24:04,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 11:24:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:24:04,644 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:04,851 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-06 11:24:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 11:24:04,851 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2021-05-06 11:24:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:04,852 INFO L225 Difference]: With dead ends: 186 [2021-05-06 11:24:04,852 INFO L226 Difference]: Without dead ends: 180 [2021-05-06 11:24:04,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2547.9ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 11:24:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-06 11:24:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-06 11:24:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-05-06 11:24:04,855 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-05-06 11:24:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:04,855 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-05-06 11:24:04,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-05-06 11:24:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 11:24:04,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:04,855 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:04,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-06 11:24:04,856 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -625493696, now seen corresponding path program 83 times [2021-05-06 11:24:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:04,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753858786] [2021-05-06 11:24:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:04,861 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:04,861 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:04,861 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:07,317 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:07,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753858786] [2021-05-06 11:24:07,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [753858786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:07,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:07,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-06 11:24:07,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479316528] [2021-05-06 11:24:07,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 11:24:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 11:24:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:24:07,318 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:07,606 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-06 11:24:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 11:24:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-06 11:24:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:07,607 INFO L225 Difference]: With dead ends: 188 [2021-05-06 11:24:07,607 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 11:24:07,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2385.7ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 11:24:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 11:24:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-05-06 11:24:07,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-05-06 11:24:07,610 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-05-06 11:24:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:07,610 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-05-06 11:24:07,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-05-06 11:24:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 11:24:07,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:07,611 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:07,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-06 11:24:07,611 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -678107806, now seen corresponding path program 84 times [2021-05-06 11:24:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:07,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984100871] [2021-05-06 11:24:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:07,615 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:07,616 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:07,616 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:10,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:10,131 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984100871] [2021-05-06 11:24:10,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984100871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:10,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:10,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-06 11:24:10,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043041726] [2021-05-06 11:24:10,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 11:24:10,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 11:24:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:24:10,132 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:10,496 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-06 11:24:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 11:24:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-06 11:24:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:10,497 INFO L225 Difference]: With dead ends: 190 [2021-05-06 11:24:10,497 INFO L226 Difference]: Without dead ends: 184 [2021-05-06 11:24:10,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2444.6ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 11:24:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-06 11:24:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-05-06 11:24:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-05-06 11:24:10,500 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-05-06 11:24:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:10,500 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-05-06 11:24:10,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-05-06 11:24:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-06 11:24:10,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:10,501 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:10,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-06 11:24:10,501 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:10,502 INFO L82 PathProgramCache]: Analyzing trace with hash 299340036, now seen corresponding path program 85 times [2021-05-06 11:24:10,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:10,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626734123] [2021-05-06 11:24:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:10,505 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:10,505 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:10,506 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:13,096 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:13,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626734123] [2021-05-06 11:24:13,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [626734123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:13,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:13,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-06 11:24:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394512574] [2021-05-06 11:24:13,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 11:24:13,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 11:24:13,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:24:13,098 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:13,425 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-06 11:24:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 11:24:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-05-06 11:24:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:13,427 INFO L225 Difference]: With dead ends: 192 [2021-05-06 11:24:13,427 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 11:24:13,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2518.6ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 11:24:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 11:24:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 11:24:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-05-06 11:24:13,430 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-05-06 11:24:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:13,430 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-05-06 11:24:13,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-05-06 11:24:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-06 11:24:13,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:13,431 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:13,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-06 11:24:13,431 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash -971121626, now seen corresponding path program 86 times [2021-05-06 11:24:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:13,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273598057] [2021-05-06 11:24:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:13,436 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:13,436 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:13,436 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:16,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:16,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273598057] [2021-05-06 11:24:16,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [273598057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:16,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:16,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-06 11:24:16,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579172412] [2021-05-06 11:24:16,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 11:24:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 11:24:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:24:16,069 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:16,293 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-06 11:24:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 11:24:16,293 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-05-06 11:24:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:16,294 INFO L225 Difference]: With dead ends: 194 [2021-05-06 11:24:16,294 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 11:24:16,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2556.0ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 11:24:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 11:24:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-05-06 11:24:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-05-06 11:24:16,297 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-05-06 11:24:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:16,297 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-05-06 11:24:16,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-05-06 11:24:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-06 11:24:16,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:16,298 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:16,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-06 11:24:16,298 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2114066744, now seen corresponding path program 87 times [2021-05-06 11:24:16,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:16,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046938813] [2021-05-06 11:24:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:16,308 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:16,308 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:16,309 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:18,976 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046938813] [2021-05-06 11:24:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046938813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:18,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:18,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-06 11:24:18,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289808805] [2021-05-06 11:24:18,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 11:24:18,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 11:24:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:24:18,977 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:19,350 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-06 11:24:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 11:24:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2021-05-06 11:24:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:19,351 INFO L225 Difference]: With dead ends: 196 [2021-05-06 11:24:19,351 INFO L226 Difference]: Without dead ends: 190 [2021-05-06 11:24:19,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2596.4ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 11:24:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-06 11:24:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-05-06 11:24:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-05-06 11:24:19,354 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-05-06 11:24:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:19,358 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-05-06 11:24:19,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-05-06 11:24:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-06 11:24:19,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:19,359 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:19,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-06 11:24:19,359 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash -972697366, now seen corresponding path program 88 times [2021-05-06 11:24:19,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:19,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162344432] [2021-05-06 11:24:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:19,366 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:19,366 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:19,366 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:22,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:22,108 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:22,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162344432] [2021-05-06 11:24:22,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162344432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:22,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:22,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-06 11:24:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888587484] [2021-05-06 11:24:22,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 11:24:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 11:24:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:24:22,109 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:22,442 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-06 11:24:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 11:24:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2021-05-06 11:24:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:22,443 INFO L225 Difference]: With dead ends: 198 [2021-05-06 11:24:22,443 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 11:24:22,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2671.6ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 11:24:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 11:24:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-05-06 11:24:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-05-06 11:24:22,446 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-05-06 11:24:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:22,446 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-05-06 11:24:22,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-05-06 11:24:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-06 11:24:22,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:22,447 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:22,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-06 11:24:22,447 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash 666614412, now seen corresponding path program 89 times [2021-05-06 11:24:22,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:22,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596938313] [2021-05-06 11:24:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:22,458 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:22,458 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:22,459 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:25,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:25,240 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:25,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596938313] [2021-05-06 11:24:25,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [596938313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:25,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:25,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-06 11:24:25,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707804214] [2021-05-06 11:24:25,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 11:24:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 11:24:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:24:25,241 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:25,517 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-06 11:24:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 11:24:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-06 11:24:25,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:25,518 INFO L225 Difference]: With dead ends: 200 [2021-05-06 11:24:25,518 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 11:24:25,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2711.7ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 11:24:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 11:24:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-06 11:24:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-05-06 11:24:25,521 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-05-06 11:24:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:25,521 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-05-06 11:24:25,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-05-06 11:24:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-06 11:24:25,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:25,522 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:25,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-06 11:24:25,522 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash -207764562, now seen corresponding path program 90 times [2021-05-06 11:24:25,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:25,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755810629] [2021-05-06 11:24:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:25,526 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:25,526 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:25,527 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:28,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:28,380 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755810629] [2021-05-06 11:24:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755810629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:28,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:28,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-06 11:24:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176515277] [2021-05-06 11:24:28,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 11:24:28,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 11:24:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:24:28,381 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:28,657 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-06 11:24:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 11:24:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2021-05-06 11:24:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:28,658 INFO L225 Difference]: With dead ends: 202 [2021-05-06 11:24:28,658 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 11:24:28,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2778.6ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 11:24:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 11:24:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-05-06 11:24:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-05-06 11:24:28,661 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-05-06 11:24:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:28,661 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-05-06 11:24:28,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-05-06 11:24:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 11:24:28,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:28,662 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:28,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-06 11:24:28,662 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1327631440, now seen corresponding path program 91 times [2021-05-06 11:24:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:28,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191489353] [2021-05-06 11:24:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:28,667 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:28,667 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:28,668 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:31,612 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:31,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191489353] [2021-05-06 11:24:31,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191489353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:31,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:31,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-06 11:24:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144794421] [2021-05-06 11:24:31,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 11:24:31,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 11:24:31,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:24:31,613 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:31,864 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-06 11:24:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-06 11:24:31,864 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2021-05-06 11:24:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:31,865 INFO L225 Difference]: With dead ends: 204 [2021-05-06 11:24:31,865 INFO L226 Difference]: Without dead ends: 198 [2021-05-06 11:24:31,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2868.4ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 11:24:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-06 11:24:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-05-06 11:24:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-05-06 11:24:31,868 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-05-06 11:24:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:31,868 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-05-06 11:24:31,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-05-06 11:24:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-06 11:24:31,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:31,869 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:31,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-06 11:24:31,869 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash -625560462, now seen corresponding path program 92 times [2021-05-06 11:24:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:31,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910305396] [2021-05-06 11:24:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:31,873 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:31,874 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:31,874 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:34,869 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:34,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910305396] [2021-05-06 11:24:34,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [910305396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:34,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:34,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-06 11:24:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657079943] [2021-05-06 11:24:34,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 11:24:34,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:34,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 11:24:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:24:34,871 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:35,125 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-06 11:24:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 11:24:35,126 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2021-05-06 11:24:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:35,126 INFO L225 Difference]: With dead ends: 206 [2021-05-06 11:24:35,126 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 11:24:35,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2918.4ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 11:24:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 11:24:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-05-06 11:24:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-05-06 11:24:35,129 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-05-06 11:24:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:35,129 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-05-06 11:24:35,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-05-06 11:24:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-06 11:24:35,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:35,130 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:35,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-06 11:24:35,130 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash -742269932, now seen corresponding path program 93 times [2021-05-06 11:24:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:35,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723566898] [2021-05-06 11:24:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:35,134 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:35,134 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:35,134 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:38,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:38,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:38,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723566898] [2021-05-06 11:24:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [723566898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-06 11:24:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065223040] [2021-05-06 11:24:38,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-06 11:24:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-06 11:24:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:24:38,217 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:38,509 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-06 11:24:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-06 11:24:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2021-05-06 11:24:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:38,510 INFO L225 Difference]: With dead ends: 208 [2021-05-06 11:24:38,510 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 11:24:38,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3007.0ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 11:24:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 11:24:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-05-06 11:24:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-05-06 11:24:38,513 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-05-06 11:24:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:38,513 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-05-06 11:24:38,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-05-06 11:24:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-06 11:24:38,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:38,514 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:38,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-06 11:24:38,514 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1230920906, now seen corresponding path program 94 times [2021-05-06 11:24:38,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:38,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797768609] [2021-05-06 11:24:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:38,518 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:38,518 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:38,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:41,753 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797768609] [2021-05-06 11:24:41,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1797768609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:41,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:41,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-06 11:24:41,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859018813] [2021-05-06 11:24:41,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 11:24:41,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 11:24:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:24:41,754 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:42,113 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-05-06 11:24:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-06 11:24:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-06 11:24:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:42,114 INFO L225 Difference]: With dead ends: 210 [2021-05-06 11:24:42,114 INFO L226 Difference]: Without dead ends: 204 [2021-05-06 11:24:42,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3154.5ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 11:24:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-06 11:24:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-06 11:24:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-05-06 11:24:42,117 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-05-06 11:24:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:42,117 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-05-06 11:24:42,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-05-06 11:24:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-06 11:24:42,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:42,118 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:42,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-06 11:24:42,118 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1621895640, now seen corresponding path program 95 times [2021-05-06 11:24:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:42,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439143214] [2021-05-06 11:24:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:42,121 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:42,121 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:42,122 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:45,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:45,301 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439143214] [2021-05-06 11:24:45,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [439143214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:45,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:45,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-06 11:24:45,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77225911] [2021-05-06 11:24:45,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-06 11:24:45,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-06 11:24:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:24:45,303 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:45,740 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-05-06 11:24:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-06 11:24:45,740 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-06 11:24:45,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:45,741 INFO L225 Difference]: With dead ends: 212 [2021-05-06 11:24:45,741 INFO L226 Difference]: Without dead ends: 206 [2021-05-06 11:24:45,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3103.0ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 11:24:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-06 11:24:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-05-06 11:24:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-05-06 11:24:45,744 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-05-06 11:24:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:45,744 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-05-06 11:24:45,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-05-06 11:24:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-06 11:24:45,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:45,745 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:45,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-06 11:24:45,745 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1305505798, now seen corresponding path program 96 times [2021-05-06 11:24:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128121904] [2021-05-06 11:24:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:45,748 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:45,749 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:45,749 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:48,950 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:48,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128121904] [2021-05-06 11:24:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [128121904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:48,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:48,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-06 11:24:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151069740] [2021-05-06 11:24:48,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-06 11:24:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-06 11:24:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:24:48,951 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:49,334 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-05-06 11:24:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-06 11:24:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-06 11:24:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:49,335 INFO L225 Difference]: With dead ends: 214 [2021-05-06 11:24:49,335 INFO L226 Difference]: Without dead ends: 208 [2021-05-06 11:24:49,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3125.5ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 11:24:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-06 11:24:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-06 11:24:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-05-06 11:24:49,338 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-05-06 11:24:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:49,338 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-05-06 11:24:49,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-05-06 11:24:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-06 11:24:49,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:49,339 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:49,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-06 11:24:49,339 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1334708836, now seen corresponding path program 97 times [2021-05-06 11:24:49,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:49,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763212619] [2021-05-06 11:24:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:49,343 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:49,343 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:49,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:52,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:52,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:52,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763212619] [2021-05-06 11:24:52,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1763212619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:52,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:52,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-06 11:24:52,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569685364] [2021-05-06 11:24:52,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-06 11:24:52,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:52,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-06 11:24:52,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:24:52,674 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:53,033 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-05-06 11:24:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-06 11:24:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-06 11:24:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:53,034 INFO L225 Difference]: With dead ends: 216 [2021-05-06 11:24:53,034 INFO L226 Difference]: Without dead ends: 210 [2021-05-06 11:24:53,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3250.9ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 11:24:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-06 11:24:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-06 11:24:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-05-06 11:24:53,037 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-05-06 11:24:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:53,038 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-05-06 11:24:53,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-05-06 11:24:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-06 11:24:53,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:53,038 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:53,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-06 11:24:53,038 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:53,039 INFO L82 PathProgramCache]: Analyzing trace with hash 665942718, now seen corresponding path program 98 times [2021-05-06 11:24:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:53,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405224174] [2021-05-06 11:24:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:53,044 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:53,044 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:53,045 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:56,450 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:56,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405224174] [2021-05-06 11:24:56,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405224174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:56,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:56,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-06 11:24:56,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127231410] [2021-05-06 11:24:56,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-06 11:24:56,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-06 11:24:56,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:24:56,452 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:56,740 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-05-06 11:24:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 11:24:56,740 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-06 11:24:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:56,741 INFO L225 Difference]: With dead ends: 218 [2021-05-06 11:24:56,741 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 11:24:56,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3319.7ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 11:24:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 11:24:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-06 11:24:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-05-06 11:24:56,744 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-05-06 11:24:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:56,744 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-05-06 11:24:56,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-05-06 11:24:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-06 11:24:56,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:56,745 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:56,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-06 11:24:56,745 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash -853262496, now seen corresponding path program 99 times [2021-05-06 11:24:56,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:56,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504401073] [2021-05-06 11:24:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:56,767 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:56,767 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:24:56,767 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:00,175 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:00,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504401073] [2021-05-06 11:25:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1504401073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:00,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:00,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-06 11:25:00,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003305497] [2021-05-06 11:25:00,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-06 11:25:00,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-06 11:25:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:25:00,176 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:00,628 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-05-06 11:25:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-06 11:25:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-06 11:25:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:00,630 INFO L225 Difference]: With dead ends: 220 [2021-05-06 11:25:00,630 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 11:25:00,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3326.8ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 11:25:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 11:25:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-05-06 11:25:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-05-06 11:25:00,641 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-05-06 11:25:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:00,641 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-05-06 11:25:00,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-05-06 11:25:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 11:25:00,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:00,643 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:00,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-06 11:25:00,643 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash -520592510, now seen corresponding path program 100 times [2021-05-06 11:25:00,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:00,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791582242] [2021-05-06 11:25:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:00,653 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:00,653 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:00,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:04,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:04,440 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:04,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791582242] [2021-05-06 11:25:04,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791582242] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:04,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:04,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-06 11:25:04,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717155338] [2021-05-06 11:25:04,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-06 11:25:04,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-06 11:25:04,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:25:04,442 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:04,913 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-05-06 11:25:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-06 11:25:04,913 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2021-05-06 11:25:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:04,914 INFO L225 Difference]: With dead ends: 222 [2021-05-06 11:25:04,914 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 11:25:04,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3703.9ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 11:25:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 11:25:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-05-06 11:25:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-05-06 11:25:04,917 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-05-06 11:25:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:04,918 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-05-06 11:25:04,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-05-06 11:25:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-06 11:25:04,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:04,918 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:04,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-06 11:25:04,919 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1347684132, now seen corresponding path program 101 times [2021-05-06 11:25:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:04,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274015818] [2021-05-06 11:25:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:04,922 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:04,922 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:04,923 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:09,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:09,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274015818] [2021-05-06 11:25:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274015818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:09,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:09,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-06 11:25:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479105222] [2021-05-06 11:25:09,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-06 11:25:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-06 11:25:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:25:09,081 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:09,577 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-05-06 11:25:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-06 11:25:09,578 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-06 11:25:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:09,579 INFO L225 Difference]: With dead ends: 224 [2021-05-06 11:25:09,579 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 11:25:09,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4056.7ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 11:25:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 11:25:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-06 11:25:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-05-06 11:25:09,582 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-05-06 11:25:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:09,582 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-05-06 11:25:09,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-05-06 11:25:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-06 11:25:09,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:09,583 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:09,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-06 11:25:09,583 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1465207366, now seen corresponding path program 102 times [2021-05-06 11:25:09,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:09,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885703432] [2021-05-06 11:25:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:09,591 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:09,591 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:09,592 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:13,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:13,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885703432] [2021-05-06 11:25:13,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885703432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:13,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:13,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-06 11:25:13,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122027423] [2021-05-06 11:25:13,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 11:25:13,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 11:25:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:25:13,726 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:14,125 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-05-06 11:25:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-06 11:25:14,125 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-06 11:25:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:14,126 INFO L225 Difference]: With dead ends: 226 [2021-05-06 11:25:14,126 INFO L226 Difference]: Without dead ends: 220 [2021-05-06 11:25:14,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4041.8ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 11:25:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-06 11:25:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-05-06 11:25:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-05-06 11:25:14,129 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-05-06 11:25:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:14,130 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-05-06 11:25:14,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-05-06 11:25:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-06 11:25:14,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:14,130 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:14,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-06 11:25:14,130 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1559081752, now seen corresponding path program 103 times [2021-05-06 11:25:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748606811] [2021-05-06 11:25:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:14,134 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:14,134 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:14,135 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:17,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:17,942 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:17,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748606811] [2021-05-06 11:25:17,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [748606811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:17,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:17,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-06 11:25:17,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53480390] [2021-05-06 11:25:17,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-06 11:25:17,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-06 11:25:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:25:17,944 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:18,246 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-05-06 11:25:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-06 11:25:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2021-05-06 11:25:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:18,247 INFO L225 Difference]: With dead ends: 228 [2021-05-06 11:25:18,247 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 11:25:18,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3721.4ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-06 11:25:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 11:25:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-06 11:25:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-05-06 11:25:18,250 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-05-06 11:25:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:18,250 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-05-06 11:25:18,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-05-06 11:25:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-06 11:25:18,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:18,251 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:18,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-06 11:25:18,251 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -208064758, now seen corresponding path program 104 times [2021-05-06 11:25:18,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:18,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088793143] [2021-05-06 11:25:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:18,255 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:18,255 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:18,255 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:22,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:22,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:22,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088793143] [2021-05-06 11:25:22,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088793143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:22,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:22,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-06 11:25:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730741797] [2021-05-06 11:25:22,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-06 11:25:22,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-06 11:25:22,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:25:22,215 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:22,521 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-05-06 11:25:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-06 11:25:22,521 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-06 11:25:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:22,522 INFO L225 Difference]: With dead ends: 230 [2021-05-06 11:25:22,522 INFO L226 Difference]: Without dead ends: 224 [2021-05-06 11:25:22,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3874.4ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 11:25:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-06 11:25:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-05-06 11:25:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-05-06 11:25:22,525 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-05-06 11:25:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:22,525 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-05-06 11:25:22,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-05-06 11:25:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-06 11:25:22,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:22,526 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:22,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-06 11:25:22,526 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:22,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1039143084, now seen corresponding path program 105 times [2021-05-06 11:25:22,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:22,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37174423] [2021-05-06 11:25:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:22,531 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:22,531 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:22,532 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:26,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:26,423 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37174423] [2021-05-06 11:25:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [37174423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:26,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:26,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-06 11:25:26,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762829962] [2021-05-06 11:25:26,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-06 11:25:26,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-06 11:25:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:25:26,425 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:26,741 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-05-06 11:25:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-06 11:25:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2021-05-06 11:25:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:26,742 INFO L225 Difference]: With dead ends: 232 [2021-05-06 11:25:26,742 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 11:25:26,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3809.2ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-06 11:25:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 11:25:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-05-06 11:25:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-05-06 11:25:26,745 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-05-06 11:25:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:26,746 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-05-06 11:25:26,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-05-06 11:25:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-06 11:25:26,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:26,746 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:26,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-06 11:25:26,747 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1310003662, now seen corresponding path program 106 times [2021-05-06 11:25:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:26,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027574418] [2021-05-06 11:25:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:26,750 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:26,750 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:26,751 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:30,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:30,852 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027574418] [2021-05-06 11:25:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027574418] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:30,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:30,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-06 11:25:30,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407590156] [2021-05-06 11:25:30,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-06 11:25:30,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:30,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-06 11:25:30,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:25:30,854 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:31,168 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-05-06 11:25:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-06 11:25:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2021-05-06 11:25:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:31,169 INFO L225 Difference]: With dead ends: 234 [2021-05-06 11:25:31,169 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 11:25:31,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4001.4ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 11:25:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 11:25:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 11:25:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-05-06 11:25:31,173 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-05-06 11:25:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:31,173 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-05-06 11:25:31,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-05-06 11:25:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-06 11:25:31,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:31,173 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:31,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-06 11:25:31,174 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:31,174 INFO L82 PathProgramCache]: Analyzing trace with hash -385985936, now seen corresponding path program 107 times [2021-05-06 11:25:31,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:31,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840153484] [2021-05-06 11:25:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:31,177 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:31,177 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:31,178 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:35,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:35,241 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840153484] [2021-05-06 11:25:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [840153484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:35,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:35,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-06 11:25:35,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233664189] [2021-05-06 11:25:35,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-06 11:25:35,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-06 11:25:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:25:35,242 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:35,555 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-05-06 11:25:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-06 11:25:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2021-05-06 11:25:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:35,556 INFO L225 Difference]: With dead ends: 236 [2021-05-06 11:25:35,556 INFO L226 Difference]: Without dead ends: 230 [2021-05-06 11:25:35,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3962.3ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 11:25:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-06 11:25:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-05-06 11:25:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-05-06 11:25:35,559 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-05-06 11:25:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:35,559 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-05-06 11:25:35,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-05-06 11:25:35,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-06 11:25:35,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:35,560 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:35,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-06 11:25:35,560 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1855582866, now seen corresponding path program 108 times [2021-05-06 11:25:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:35,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300483016] [2021-05-06 11:25:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:35,567 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:35,567 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:35,567 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:39,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:39,999 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:39,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300483016] [2021-05-06 11:25:39,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [300483016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:39,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:39,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-06 11:25:39,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342346095] [2021-05-06 11:25:40,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-06 11:25:40,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-06 11:25:40,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:25:40,001 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:40,368 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-05-06 11:25:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-06 11:25:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2021-05-06 11:25:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:40,369 INFO L225 Difference]: With dead ends: 238 [2021-05-06 11:25:40,369 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 11:25:40,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4329.6ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 11:25:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 11:25:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-05-06 11:25:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-05-06 11:25:40,372 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-05-06 11:25:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:40,373 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-05-06 11:25:40,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-05-06 11:25:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 11:25:40,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:40,389 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:40,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-06 11:25:40,389 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -70381004, now seen corresponding path program 109 times [2021-05-06 11:25:40,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908544642] [2021-05-06 11:25:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:40,393 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:40,393 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:40,393 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:44,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:44,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:44,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908544642] [2021-05-06 11:25:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [908544642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:44,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:44,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-06 11:25:44,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487001723] [2021-05-06 11:25:44,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-06 11:25:44,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-06 11:25:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:25:44,641 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:45,178 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-05-06 11:25:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-06 11:25:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-06 11:25:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:45,179 INFO L225 Difference]: With dead ends: 240 [2021-05-06 11:25:45,179 INFO L226 Difference]: Without dead ends: 234 [2021-05-06 11:25:45,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4155.4ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 11:25:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-06 11:25:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-05-06 11:25:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-05-06 11:25:45,182 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-05-06 11:25:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:45,183 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-05-06 11:25:45,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-05-06 11:25:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-06 11:25:45,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:45,184 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:45,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-06 11:25:45,184 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash 209244502, now seen corresponding path program 110 times [2021-05-06 11:25:45,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:45,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96881502] [2021-05-06 11:25:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:45,187 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:45,187 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:45,187 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:49,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:49,719 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96881502] [2021-05-06 11:25:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [96881502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:49,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:49,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-06 11:25:49,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239033161] [2021-05-06 11:25:49,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-06 11:25:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-06 11:25:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:25:49,720 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:50,333 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-05-06 11:25:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-06 11:25:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2021-05-06 11:25:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:50,335 INFO L225 Difference]: With dead ends: 242 [2021-05-06 11:25:50,335 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 11:25:50,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 4443.7ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 11:25:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 11:25:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-06 11:25:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-05-06 11:25:50,338 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-05-06 11:25:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:50,338 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-05-06 11:25:50,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-05-06 11:25:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-06 11:25:50,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:50,339 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:50,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-06 11:25:50,339 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:50,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1653583880, now seen corresponding path program 111 times [2021-05-06 11:25:50,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:50,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034517237] [2021-05-06 11:25:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:50,342 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:50,342 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:50,342 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:54,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:54,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:54,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034517237] [2021-05-06 11:25:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034517237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:54,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-06 11:25:54,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635924110] [2021-05-06 11:25:54,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-06 11:25:54,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:54,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-06 11:25:54,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:25:54,929 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:25:55,441 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-05-06 11:25:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-06 11:25:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2021-05-06 11:25:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:25:55,442 INFO L225 Difference]: With dead ends: 244 [2021-05-06 11:25:55,442 INFO L226 Difference]: Without dead ends: 238 [2021-05-06 11:25:55,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4485.9ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-06 11:25:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-06 11:25:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-05-06 11:25:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-05-06 11:25:55,445 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-05-06 11:25:55,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:25:55,445 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-05-06 11:25:55,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:25:55,446 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-05-06 11:25:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-06 11:25:55,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:25:55,446 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:25:55,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-06 11:25:55,446 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:25:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:25:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash -830296550, now seen corresponding path program 112 times [2021-05-06 11:25:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:25:55,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202406250] [2021-05-06 11:25:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:25:55,449 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:25:55,450 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:25:55,450 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:25:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:25:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:25:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:25:59,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:25:59,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202406250] [2021-05-06 11:25:59,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [202406250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:25:59,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:25:59,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-06 11:25:59,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52823925] [2021-05-06 11:25:59,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-06 11:25:59,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:25:59,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-06 11:25:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:25:59,812 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:00,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:00,392 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-05-06 11:26:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-06 11:26:00,392 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-06 11:26:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:00,393 INFO L225 Difference]: With dead ends: 246 [2021-05-06 11:26:00,393 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 11:26:00,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4260.6ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-06 11:26:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 11:26:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-06 11:26:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-05-06 11:26:00,396 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-05-06 11:26:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:00,396 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-05-06 11:26:00,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-05-06 11:26:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-06 11:26:00,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:00,397 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:00,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-06 11:26:00,397 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash 74845116, now seen corresponding path program 113 times [2021-05-06 11:26:00,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:00,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226079510] [2021-05-06 11:26:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:00,400 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:00,400 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:00,401 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:04,823 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:04,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226079510] [2021-05-06 11:26:04,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [226079510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:04,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:04,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-06 11:26:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481360091] [2021-05-06 11:26:04,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-06 11:26:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:04,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-06 11:26:04,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:26:04,824 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:05,122 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-05-06 11:26:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-06 11:26:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-06 11:26:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:05,123 INFO L225 Difference]: With dead ends: 248 [2021-05-06 11:26:05,123 INFO L226 Difference]: Without dead ends: 242 [2021-05-06 11:26:05,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4330.3ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-06 11:26:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-06 11:26:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-05-06 11:26:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-05-06 11:26:05,126 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-05-06 11:26:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:05,127 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-05-06 11:26:05,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-05-06 11:26:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-06 11:26:05,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:05,127 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:05,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-06 11:26:05,128 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1962374946, now seen corresponding path program 114 times [2021-05-06 11:26:05,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:05,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109727434] [2021-05-06 11:26:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:05,131 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:05,131 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:05,132 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:09,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:09,637 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:09,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109727434] [2021-05-06 11:26:09,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109727434] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:09,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:09,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-06 11:26:09,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541378521] [2021-05-06 11:26:09,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-06 11:26:09,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:09,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-06 11:26:09,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:26:09,639 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:10,204 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-05-06 11:26:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-06 11:26:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-06 11:26:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:10,204 INFO L225 Difference]: With dead ends: 250 [2021-05-06 11:26:10,204 INFO L226 Difference]: Without dead ends: 244 [2021-05-06 11:26:10,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4413.2ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 11:26:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-06 11:26:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-06 11:26:10,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-05-06 11:26:10,208 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-05-06 11:26:10,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:10,208 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-05-06 11:26:10,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-05-06 11:26:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-06 11:26:10,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:10,213 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:10,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-06 11:26:10,213 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1225767552, now seen corresponding path program 115 times [2021-05-06 11:26:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:10,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378832269] [2021-05-06 11:26:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:10,216 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:10,216 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:10,217 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:14,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:14,860 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:14,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378832269] [2021-05-06 11:26:14,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [378832269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:14,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:14,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-06 11:26:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116726766] [2021-05-06 11:26:14,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-06 11:26:14,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-06 11:26:14,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:26:14,862 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:15,337 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-05-06 11:26:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-06 11:26:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2021-05-06 11:26:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:15,339 INFO L225 Difference]: With dead ends: 252 [2021-05-06 11:26:15,339 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 11:26:15,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4537.8ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 11:26:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 11:26:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-06 11:26:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-05-06 11:26:15,346 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-05-06 11:26:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:15,346 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-05-06 11:26:15,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-05-06 11:26:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-06 11:26:15,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:15,347 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:15,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-06 11:26:15,347 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:15,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2015665758, now seen corresponding path program 116 times [2021-05-06 11:26:15,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:15,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268777647] [2021-05-06 11:26:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:15,351 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:15,351 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:15,352 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:20,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:20,119 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:20,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268777647] [2021-05-06 11:26:20,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [268777647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:20,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:20,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-06 11:26:20,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408211642] [2021-05-06 11:26:20,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-06 11:26:20,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-06 11:26:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:26:20,121 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:20,452 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-05-06 11:26:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-06 11:26:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-06 11:26:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:20,454 INFO L225 Difference]: With dead ends: 254 [2021-05-06 11:26:20,454 INFO L226 Difference]: Without dead ends: 248 [2021-05-06 11:26:20,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4660.5ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 11:26:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-06 11:26:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-05-06 11:26:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-05-06 11:26:20,457 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-05-06 11:26:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:20,457 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-05-06 11:26:20,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-05-06 11:26:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-06 11:26:20,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:20,458 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:20,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-06 11:26:20,458 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash -898630332, now seen corresponding path program 117 times [2021-05-06 11:26:20,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:20,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834000233] [2021-05-06 11:26:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:20,465 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:20,465 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:20,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:25,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:25,365 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834000233] [2021-05-06 11:26:25,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [834000233] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:25,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:25,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-06 11:26:25,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059945557] [2021-05-06 11:26:25,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-06 11:26:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-06 11:26:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:26:25,366 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:25,928 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-05-06 11:26:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-06 11:26:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2021-05-06 11:26:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:25,929 INFO L225 Difference]: With dead ends: 256 [2021-05-06 11:26:25,929 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 11:26:25,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4799.6ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 11:26:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 11:26:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-06 11:26:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-05-06 11:26:25,932 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-05-06 11:26:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:25,933 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-05-06 11:26:25,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-05-06 11:26:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 11:26:25,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:25,933 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:25,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-06 11:26:25,934 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1169409946, now seen corresponding path program 118 times [2021-05-06 11:26:25,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:25,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940853945] [2021-05-06 11:26:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:25,939 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:25,940 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:25,940 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:30,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:30,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940853945] [2021-05-06 11:26:30,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [940853945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:30,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:30,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-06 11:26:30,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928539562] [2021-05-06 11:26:30,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-06 11:26:30,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-06 11:26:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:26:30,785 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:31,340 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-05-06 11:26:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-06 11:26:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2021-05-06 11:26:31,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:31,341 INFO L225 Difference]: With dead ends: 258 [2021-05-06 11:26:31,341 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 11:26:31,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4744.3ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 11:26:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 11:26:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-05-06 11:26:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-05-06 11:26:31,344 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-05-06 11:26:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:31,345 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-05-06 11:26:31,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-05-06 11:26:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-06 11:26:31,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:31,345 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:31,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-06 11:26:31,346 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 604386056, now seen corresponding path program 119 times [2021-05-06 11:26:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:31,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684949321] [2021-05-06 11:26:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:31,358 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:31,358 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:31,359 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:36,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684949321] [2021-05-06 11:26:36,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [684949321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:36,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:36,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-06 11:26:36,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263326467] [2021-05-06 11:26:36,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-06 11:26:36,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:36,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-06 11:26:36,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:26:36,304 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:36,877 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-05-06 11:26:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-06 11:26:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-06 11:26:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:36,878 INFO L225 Difference]: With dead ends: 260 [2021-05-06 11:26:36,878 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 11:26:36,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4841.7ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-06 11:26:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 11:26:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-06 11:26:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-05-06 11:26:36,881 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-05-06 11:26:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:36,881 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-05-06 11:26:36,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-05-06 11:26:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-06 11:26:36,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:36,882 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:36,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-06 11:26:36,882 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:36,882 INFO L82 PathProgramCache]: Analyzing trace with hash 120327466, now seen corresponding path program 120 times [2021-05-06 11:26:36,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:36,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369598745] [2021-05-06 11:26:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:36,885 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:36,885 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:36,886 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:42,054 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369598745] [2021-05-06 11:26:42,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369598745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:42,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:42,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-06 11:26:42,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513928172] [2021-05-06 11:26:42,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-06 11:26:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-06 11:26:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:26:42,055 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:42,623 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-05-06 11:26:42,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-06 11:26:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2021-05-06 11:26:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:42,624 INFO L225 Difference]: With dead ends: 262 [2021-05-06 11:26:42,624 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 11:26:42,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5066.9ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 11:26:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 11:26:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-05-06 11:26:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-05-06 11:26:42,627 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-05-06 11:26:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:42,627 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-05-06 11:26:42,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-05-06 11:26:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-06 11:26:42,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:42,628 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:42,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-06 11:26:42,628 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1203509556, now seen corresponding path program 121 times [2021-05-06 11:26:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968914049] [2021-05-06 11:26:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:42,632 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:42,632 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:42,632 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:47,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:47,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:47,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968914049] [2021-05-06 11:26:47,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [968914049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:47,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:47,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-06 11:26:47,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388748372] [2021-05-06 11:26:47,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-06 11:26:47,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-06 11:26:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:26:47,718 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:48,317 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-05-06 11:26:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-06 11:26:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2021-05-06 11:26:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:48,318 INFO L225 Difference]: With dead ends: 264 [2021-05-06 11:26:48,318 INFO L226 Difference]: Without dead ends: 258 [2021-05-06 11:26:48,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4987.5ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-06 11:26:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-06 11:26:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-05-06 11:26:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-05-06 11:26:48,321 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-05-06 11:26:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:48,321 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-05-06 11:26:48,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-05-06 11:26:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-06 11:26:48,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:48,322 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:48,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-06 11:26:48,322 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2100568082, now seen corresponding path program 122 times [2021-05-06 11:26:48,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:48,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044535506] [2021-05-06 11:26:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:48,335 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:48,335 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:48,336 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:53,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:53,615 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:53,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044535506] [2021-05-06 11:26:53,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044535506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:53,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:53,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-06 11:26:53,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269583734] [2021-05-06 11:26:53,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-06 11:26:53,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-06 11:26:53,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:26:53,617 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:54,015 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-05-06 11:26:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-06 11:26:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2021-05-06 11:26:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:54,016 INFO L225 Difference]: With dead ends: 266 [2021-05-06 11:26:54,016 INFO L226 Difference]: Without dead ends: 260 [2021-05-06 11:26:54,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5164.9ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 11:26:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-06 11:26:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-05-06 11:26:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-05-06 11:26:54,019 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-05-06 11:26:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:54,019 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-05-06 11:26:54,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-05-06 11:26:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-06 11:26:54,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:54,020 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:54,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-06 11:26:54,020 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash -885385072, now seen corresponding path program 123 times [2021-05-06 11:26:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281739239] [2021-05-06 11:26:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:54,023 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:54,023 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:54,024 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:59,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:26:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:26:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:26:59,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:26:59,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281739239] [2021-05-06 11:26:59,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281739239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:26:59,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:26:59,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-06 11:26:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029781932] [2021-05-06 11:26:59,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-06 11:26:59,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:26:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-06 11:26:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:26:59,215 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:26:59,743 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-05-06 11:26:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-06 11:26:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2021-05-06 11:26:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:26:59,744 INFO L225 Difference]: With dead ends: 268 [2021-05-06 11:26:59,744 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 11:26:59,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 5077.9ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-06 11:26:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 11:26:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-05-06 11:26:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-05-06 11:26:59,748 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-05-06 11:26:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:26:59,748 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-05-06 11:26:59,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:26:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-05-06 11:26:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-06 11:26:59,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:26:59,749 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:26:59,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-06 11:26:59,749 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:26:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:26:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1325616974, now seen corresponding path program 124 times [2021-05-06 11:26:59,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:26:59,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898026382] [2021-05-06 11:26:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:26:59,752 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:26:59,752 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:26:59,753 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:26:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:05,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:05,042 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:05,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898026382] [2021-05-06 11:27:05,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898026382] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:05,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:05,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-06 11:27:05,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261131878] [2021-05-06 11:27:05,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-06 11:27:05,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:05,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-06 11:27:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:27:05,044 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:05,490 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-05-06 11:27:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-06 11:27:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-06 11:27:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:05,491 INFO L225 Difference]: With dead ends: 270 [2021-05-06 11:27:05,491 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 11:27:05,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5175.8ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-06 11:27:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 11:27:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-05-06 11:27:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-05-06 11:27:05,494 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-05-06 11:27:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:05,494 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-05-06 11:27:05,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-05-06 11:27:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-06 11:27:05,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:05,495 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:05,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-06 11:27:05,495 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash 813287508, now seen corresponding path program 125 times [2021-05-06 11:27:05,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:05,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105687314] [2021-05-06 11:27:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:05,499 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:05,499 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:05,499 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:10,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:10,943 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:10,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105687314] [2021-05-06 11:27:10,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [105687314] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:10,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:10,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-06 11:27:10,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14633495] [2021-05-06 11:27:10,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-06 11:27:10,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-06 11:27:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:27:10,945 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:11,447 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-05-06 11:27:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-06 11:27:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-06 11:27:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:11,449 INFO L225 Difference]: With dead ends: 272 [2021-05-06 11:27:11,449 INFO L226 Difference]: Without dead ends: 266 [2021-05-06 11:27:11,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5338.4ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 11:27:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-06 11:27:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-06 11:27:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-05-06 11:27:11,452 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-05-06 11:27:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:11,452 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-05-06 11:27:11,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-05-06 11:27:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-06 11:27:11,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:11,453 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:11,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-06 11:27:11,453 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:11,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:11,454 INFO L82 PathProgramCache]: Analyzing trace with hash -988840074, now seen corresponding path program 126 times [2021-05-06 11:27:11,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:11,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278707142] [2021-05-06 11:27:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:11,457 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:11,457 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:11,458 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:16,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:16,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:16,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278707142] [2021-05-06 11:27:16,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [278707142] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:16,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:16,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-06 11:27:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552930092] [2021-05-06 11:27:16,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-06 11:27:16,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-06 11:27:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:27:16,920 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:17,477 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-05-06 11:27:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-06 11:27:17,477 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-06 11:27:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:17,478 INFO L225 Difference]: With dead ends: 274 [2021-05-06 11:27:17,478 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 11:27:17,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5356.2ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 11:27:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 11:27:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-05-06 11:27:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-05-06 11:27:17,482 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-05-06 11:27:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:17,482 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-05-06 11:27:17,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-05-06 11:27:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 11:27:17,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:17,483 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:17,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-06 11:27:17,483 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1961626088, now seen corresponding path program 127 times [2021-05-06 11:27:17,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:17,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964186348] [2021-05-06 11:27:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:17,487 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:17,487 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:17,487 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:23,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:23,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:23,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964186348] [2021-05-06 11:27:23,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964186348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:23,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:23,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-06 11:27:23,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209781717] [2021-05-06 11:27:23,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-06 11:27:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-06 11:27:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:27:23,220 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:23,862 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2021-05-06 11:27:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-06 11:27:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-06 11:27:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:23,863 INFO L225 Difference]: With dead ends: 276 [2021-05-06 11:27:23,863 INFO L226 Difference]: Without dead ends: 270 [2021-05-06 11:27:23,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 5619.1ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 11:27:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-06 11:27:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-05-06 11:27:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-05-06 11:27:23,867 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-05-06 11:27:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:23,867 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-05-06 11:27:23,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-05-06 11:27:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-06 11:27:23,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:23,868 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:23,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-06 11:27:23,868 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -506115014, now seen corresponding path program 128 times [2021-05-06 11:27:23,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:23,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310502879] [2021-05-06 11:27:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:23,871 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:23,871 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:23,872 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:29,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:29,781 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310502879] [2021-05-06 11:27:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310502879] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-06 11:27:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26124577] [2021-05-06 11:27:29,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-06 11:27:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-06 11:27:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:27:29,783 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:30,173 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-05-06 11:27:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-06 11:27:30,174 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2021-05-06 11:27:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:30,174 INFO L225 Difference]: With dead ends: 278 [2021-05-06 11:27:30,174 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 11:27:30,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5800.1ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 11:27:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 11:27:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-05-06 11:27:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2021-05-06 11:27:30,178 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2021-05-06 11:27:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:30,178 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2021-05-06 11:27:30,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2021-05-06 11:27:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-06 11:27:30,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:30,179 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:30,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-06 11:27:30,179 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1919311396, now seen corresponding path program 129 times [2021-05-06 11:27:30,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:30,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517356576] [2021-05-06 11:27:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:30,188 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:30,188 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:30,188 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:36,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:36,014 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517356576] [2021-05-06 11:27:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [517356576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:36,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:36,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-06 11:27:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833330433] [2021-05-06 11:27:36,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-06 11:27:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:36,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-06 11:27:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:27:36,016 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:36,581 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2021-05-06 11:27:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-06 11:27:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-06 11:27:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:36,582 INFO L225 Difference]: With dead ends: 280 [2021-05-06 11:27:36,582 INFO L226 Difference]: Without dead ends: 274 [2021-05-06 11:27:36,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5715.7ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-06 11:27:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-06 11:27:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-05-06 11:27:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2021-05-06 11:27:36,586 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2021-05-06 11:27:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:36,586 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2021-05-06 11:27:36,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2021-05-06 11:27:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-06 11:27:36,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:36,587 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:36,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-06 11:27:36,587 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1503598334, now seen corresponding path program 130 times [2021-05-06 11:27:36,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:36,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285449950] [2021-05-06 11:27:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:36,591 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:36,591 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:36,592 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:42,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:42,540 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285449950] [2021-05-06 11:27:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [285449950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:42,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:42,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-06 11:27:42,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430317073] [2021-05-06 11:27:42,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-06 11:27:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-06 11:27:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:27:42,542 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:43,223 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2021-05-06 11:27:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-06 11:27:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2021-05-06 11:27:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:43,224 INFO L225 Difference]: With dead ends: 282 [2021-05-06 11:27:43,224 INFO L226 Difference]: Without dead ends: 276 [2021-05-06 11:27:43,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 5829.5ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 11:27:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-06 11:27:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-06 11:27:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-05-06 11:27:43,228 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2021-05-06 11:27:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:43,228 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-05-06 11:27:43,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-05-06 11:27:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-06 11:27:43,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:43,229 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:43,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-06 11:27:43,229 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 974900128, now seen corresponding path program 131 times [2021-05-06 11:27:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:43,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900986407] [2021-05-06 11:27:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:43,235 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:43,235 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:43,235 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:49,302 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:49,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900986407] [2021-05-06 11:27:49,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [900986407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:49,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:49,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-06 11:27:49,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532887079] [2021-05-06 11:27:49,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-06 11:27:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-06 11:27:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:27:49,304 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:50,006 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2021-05-06 11:27:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-06 11:27:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2021-05-06 11:27:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:50,007 INFO L225 Difference]: With dead ends: 284 [2021-05-06 11:27:50,007 INFO L226 Difference]: Without dead ends: 278 [2021-05-06 11:27:50,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5955.3ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-06 11:27:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-06 11:27:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-05-06 11:27:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2021-05-06 11:27:50,010 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2021-05-06 11:27:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:50,010 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2021-05-06 11:27:50,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2021-05-06 11:27:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-06 11:27:50,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:50,011 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:50,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-06 11:27:50,011 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash -297934910, now seen corresponding path program 132 times [2021-05-06 11:27:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:50,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543838031] [2021-05-06 11:27:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:50,015 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:50,015 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:50,016 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:27:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:27:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:27:56,160 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:27:56,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543838031] [2021-05-06 11:27:56,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543838031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:27:56,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:27:56,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-06 11:27:56,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088676107] [2021-05-06 11:27:56,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-06 11:27:56,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:27:56,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-06 11:27:56,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:27:56,162 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:27:56,792 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-05-06 11:27:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-06 11:27:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2021-05-06 11:27:56,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:27:56,793 INFO L225 Difference]: With dead ends: 286 [2021-05-06 11:27:56,793 INFO L226 Difference]: Without dead ends: 280 [2021-05-06 11:27:56,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6029.8ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 11:27:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-06 11:27:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-05-06 11:27:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2021-05-06 11:27:56,796 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2021-05-06 11:27:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:27:56,796 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2021-05-06 11:27:56,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:27:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2021-05-06 11:27:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-06 11:27:56,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:27:56,797 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:27:56,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-06 11:27:56,797 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:27:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:27:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash 573272932, now seen corresponding path program 133 times [2021-05-06 11:27:56,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:27:56,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790333140] [2021-05-06 11:27:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:27:56,801 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:27:56,801 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:27:56,801 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:27:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:02,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:02,890 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:02,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790333140] [2021-05-06 11:28:02,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [790333140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:02,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:02,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-06 11:28:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859815599] [2021-05-06 11:28:02,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-06 11:28:02,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-06 11:28:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:28:02,892 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:03,588 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2021-05-06 11:28:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-06 11:28:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2021-05-06 11:28:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:03,589 INFO L225 Difference]: With dead ends: 288 [2021-05-06 11:28:03,589 INFO L226 Difference]: Without dead ends: 282 [2021-05-06 11:28:03,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5977.1ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 11:28:03,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-06 11:28:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-05-06 11:28:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-05-06 11:28:03,592 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2021-05-06 11:28:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:03,593 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-05-06 11:28:03,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-05-06 11:28:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-06 11:28:03,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:03,593 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:03,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-06 11:28:03,594 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash 285386374, now seen corresponding path program 134 times [2021-05-06 11:28:03,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:03,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593187110] [2021-05-06 11:28:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:03,599 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:03,599 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:03,599 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:09,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:09,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593187110] [2021-05-06 11:28:09,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [593187110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:09,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:09,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-06 11:28:09,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54132921] [2021-05-06 11:28:09,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-06 11:28:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-06 11:28:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:28:09,836 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:10,562 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2021-05-06 11:28:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-06 11:28:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-06 11:28:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:10,563 INFO L225 Difference]: With dead ends: 290 [2021-05-06 11:28:10,563 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 11:28:10,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6123.9ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 11:28:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 11:28:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-05-06 11:28:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-05-06 11:28:10,567 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2021-05-06 11:28:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:10,567 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-05-06 11:28:10,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-05-06 11:28:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-06 11:28:10,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:10,568 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:10,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-06 11:28:10,568 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1495688920, now seen corresponding path program 135 times [2021-05-06 11:28:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92691880] [2021-05-06 11:28:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:10,571 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:10,571 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:10,572 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:16,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:16,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92691880] [2021-05-06 11:28:16,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [92691880] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:16,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:16,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-06 11:28:16,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15665132] [2021-05-06 11:28:16,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-06 11:28:16,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-06 11:28:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:28:16,809 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:17,493 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2021-05-06 11:28:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-06 11:28:17,494 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2021-05-06 11:28:17,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:17,495 INFO L225 Difference]: With dead ends: 292 [2021-05-06 11:28:17,495 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 11:28:17,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 6114.7ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 11:28:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 11:28:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 11:28:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2021-05-06 11:28:17,498 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2021-05-06 11:28:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:17,498 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2021-05-06 11:28:17,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2021-05-06 11:28:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 11:28:17,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:17,499 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:17,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-06 11:28:17,499 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:17,500 INFO L82 PathProgramCache]: Analyzing trace with hash 582904650, now seen corresponding path program 136 times [2021-05-06 11:28:17,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:17,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787813643] [2021-05-06 11:28:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:17,503 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:17,504 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:17,504 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:23,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:23,857 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:23,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787813643] [2021-05-06 11:28:23,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [787813643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:23,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:23,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-06 11:28:23,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641385102] [2021-05-06 11:28:23,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-06 11:28:23,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-06 11:28:23,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:28:23,859 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:24,619 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2021-05-06 11:28:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-06 11:28:24,620 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2021-05-06 11:28:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:24,621 INFO L225 Difference]: With dead ends: 294 [2021-05-06 11:28:24,621 INFO L226 Difference]: Without dead ends: 288 [2021-05-06 11:28:24,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 6238.2ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-06 11:28:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-06 11:28:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-05-06 11:28:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2021-05-06 11:28:24,624 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2021-05-06 11:28:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:24,625 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2021-05-06 11:28:24,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2021-05-06 11:28:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-06 11:28:24,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:24,626 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:24,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-06 11:28:24,626 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 951532780, now seen corresponding path program 137 times [2021-05-06 11:28:24,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:24,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448920548] [2021-05-06 11:28:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:24,629 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:24,629 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:24,630 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:31,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:31,066 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:31,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448920548] [2021-05-06 11:28:31,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448920548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:31,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:31,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-06 11:28:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490310219] [2021-05-06 11:28:31,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-06 11:28:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-06 11:28:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:28:31,068 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:31,795 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2021-05-06 11:28:31,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-06 11:28:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2021-05-06 11:28:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:31,796 INFO L225 Difference]: With dead ends: 296 [2021-05-06 11:28:31,796 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 11:28:31,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6317.8ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 11:28:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 11:28:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2021-05-06 11:28:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2021-05-06 11:28:31,800 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2021-05-06 11:28:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:31,800 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2021-05-06 11:28:31,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2021-05-06 11:28:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-06 11:28:31,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:31,801 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:31,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-06 11:28:31,801 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1279119858, now seen corresponding path program 138 times [2021-05-06 11:28:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117398466] [2021-05-06 11:28:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:31,811 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:31,811 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:31,811 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:38,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:38,661 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117398466] [2021-05-06 11:28:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [117398466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:38,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:38,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-06 11:28:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483678342] [2021-05-06 11:28:38,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-06 11:28:38,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:38,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-06 11:28:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:28:38,663 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:39,298 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2021-05-06 11:28:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-06 11:28:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2021-05-06 11:28:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:39,299 INFO L225 Difference]: With dead ends: 298 [2021-05-06 11:28:39,299 INFO L226 Difference]: Without dead ends: 292 [2021-05-06 11:28:39,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 6736.9ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 11:28:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-06 11:28:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-06 11:28:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0034965034965035) internal successors, (287), 286 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2021-05-06 11:28:39,303 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2021-05-06 11:28:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:39,303 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2021-05-06 11:28:39,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2021-05-06 11:28:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-06 11:28:39,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:39,304 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:39,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-06 11:28:39,304 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1747624272, now seen corresponding path program 139 times [2021-05-06 11:28:39,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:39,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091871239] [2021-05-06 11:28:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:39,307 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:39,307 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:39,308 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:45,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:45,903 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:45,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091871239] [2021-05-06 11:28:45,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091871239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:45,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:45,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-06 11:28:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051462165] [2021-05-06 11:28:45,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-06 11:28:45,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:45,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-06 11:28:45,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:28:45,905 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:46,319 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2021-05-06 11:28:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-06 11:28:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2021-05-06 11:28:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:46,321 INFO L225 Difference]: With dead ends: 300 [2021-05-06 11:28:46,321 INFO L226 Difference]: Without dead ends: 294 [2021-05-06 11:28:46,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 6471.8ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-06 11:28:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-06 11:28:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-05-06 11:28:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0034722222222223) internal successors, (289), 288 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2021-05-06 11:28:46,324 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2021-05-06 11:28:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:46,324 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2021-05-06 11:28:46,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2021-05-06 11:28:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-06 11:28:46,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:46,325 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:46,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-06 11:28:46,326 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1008800046, now seen corresponding path program 140 times [2021-05-06 11:28:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899072946] [2021-05-06 11:28:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:46,329 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:46,329 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:46,330 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:53,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:28:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:28:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:28:53,238 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:28:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899072946] [2021-05-06 11:28:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [899072946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:28:53,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:28:53,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-06 11:28:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748325281] [2021-05-06 11:28:53,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-06 11:28:53,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:28:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-06 11:28:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:28:53,240 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:28:53,926 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2021-05-06 11:28:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-06 11:28:53,926 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2021-05-06 11:28:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:28:53,927 INFO L225 Difference]: With dead ends: 302 [2021-05-06 11:28:53,927 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 11:28:53,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 6788.9ms TimeCoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 11:28:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 11:28:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-05-06 11:28:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0034482758620689) internal successors, (291), 290 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2021-05-06 11:28:53,931 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2021-05-06 11:28:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:28:53,931 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2021-05-06 11:28:53,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:28:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2021-05-06 11:28:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-06 11:28:53,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:28:53,932 INFO L523 BasicCegarLoop]: trace histogram [141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:28:53,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-06 11:28:53,932 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:28:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:28:53,932 INFO L82 PathProgramCache]: Analyzing trace with hash 331677300, now seen corresponding path program 141 times [2021-05-06 11:28:53,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:28:53,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520152366] [2021-05-06 11:28:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:28:53,938 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:28:53,939 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:28:53,939 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:28:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:00,836 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:00,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520152366] [2021-05-06 11:29:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [520152366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:00,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:00,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2021-05-06 11:29:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939295167] [2021-05-06 11:29:00,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2021-05-06 11:29:00,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-05-06 11:29:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:29:00,839 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:01,705 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2021-05-06 11:29:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-06 11:29:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2021-05-06 11:29:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:01,706 INFO L225 Difference]: With dead ends: 304 [2021-05-06 11:29:01,706 INFO L226 Difference]: Without dead ends: 298 [2021-05-06 11:29:01,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 6777.2ms TimeCoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 11:29:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-06 11:29:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2021-05-06 11:29:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0034246575342465) internal successors, (293), 292 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2021-05-06 11:29:01,710 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2021-05-06 11:29:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:01,710 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2021-05-06 11:29:01,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2021-05-06 11:29:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-06 11:29:01,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:01,711 INFO L523 BasicCegarLoop]: trace histogram [142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:01,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-06 11:29:01,711 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash 40218006, now seen corresponding path program 142 times [2021-05-06 11:29:01,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:01,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271836683] [2021-05-06 11:29:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:01,714 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:01,714 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:01,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:08,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:08,782 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:08,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271836683] [2021-05-06 11:29:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [271836683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2021-05-06 11:29:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214644570] [2021-05-06 11:29:08,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2021-05-06 11:29:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-05-06 11:29:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:29:08,785 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:09,642 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2021-05-06 11:29:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-06 11:29:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2021-05-06 11:29:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:09,643 INFO L225 Difference]: With dead ends: 306 [2021-05-06 11:29:09,643 INFO L226 Difference]: Without dead ends: 300 [2021-05-06 11:29:09,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6950.8ms TimeCoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-06 11:29:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-06 11:29:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-05-06 11:29:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0034013605442176) internal successors, (295), 294 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2021-05-06 11:29:09,647 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2021-05-06 11:29:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:09,647 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2021-05-06 11:29:09,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2021-05-06 11:29:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-06 11:29:09,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:09,648 INFO L523 BasicCegarLoop]: trace histogram [143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:09,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-06 11:29:09,648 INFO L428 AbstractCegarLoop]: === Iteration 145 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -879289288, now seen corresponding path program 143 times [2021-05-06 11:29:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:09,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470482113] [2021-05-06 11:29:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:09,652 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:09,652 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:09,652 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:16,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:16,686 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:16,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470482113] [2021-05-06 11:29:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470482113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2021-05-06 11:29:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800645522] [2021-05-06 11:29:16,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 147 states [2021-05-06 11:29:16,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-05-06 11:29:16,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:29:16,688 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:17,142 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2021-05-06 11:29:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-05-06 11:29:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2021-05-06 11:29:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:17,143 INFO L225 Difference]: With dead ends: 308 [2021-05-06 11:29:17,143 INFO L226 Difference]: Without dead ends: 302 [2021-05-06 11:29:17,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 6911.0ms TimeCoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-06 11:29:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-06 11:29:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2021-05-06 11:29:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0033783783783783) internal successors, (297), 296 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2021-05-06 11:29:17,147 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2021-05-06 11:29:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:17,147 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2021-05-06 11:29:17,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2021-05-06 11:29:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-06 11:29:17,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:17,148 INFO L523 BasicCegarLoop]: trace histogram [144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:17,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-06 11:29:17,148 INFO L428 AbstractCegarLoop]: === Iteration 146 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 237464154, now seen corresponding path program 144 times [2021-05-06 11:29:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:17,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058909508] [2021-05-06 11:29:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:17,151 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:17,152 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:17,152 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:24,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:24,424 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:24,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058909508] [2021-05-06 11:29:24,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058909508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:24,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:24,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2021-05-06 11:29:24,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737925542] [2021-05-06 11:29:24,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 148 states [2021-05-06 11:29:24,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-05-06 11:29:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:29:24,426 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:25,441 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2021-05-06 11:29:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-05-06 11:29:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2021-05-06 11:29:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:25,442 INFO L225 Difference]: With dead ends: 310 [2021-05-06 11:29:25,442 INFO L226 Difference]: Without dead ends: 304 [2021-05-06 11:29:25,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7143.1ms TimeCoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 11:29:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-06 11:29:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2021-05-06 11:29:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0033557046979866) internal successors, (299), 298 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2021-05-06 11:29:25,446 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2021-05-06 11:29:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:25,446 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2021-05-06 11:29:25,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2021-05-06 11:29:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 11:29:25,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:25,447 INFO L523 BasicCegarLoop]: trace histogram [145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:25,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-05-06 11:29:25,448 INFO L428 AbstractCegarLoop]: === Iteration 147 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -304302084, now seen corresponding path program 145 times [2021-05-06 11:29:25,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:25,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777135851] [2021-05-06 11:29:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:25,451 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:25,451 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:25,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:32,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:32,757 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777135851] [2021-05-06 11:29:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777135851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:32,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:32,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2021-05-06 11:29:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946093368] [2021-05-06 11:29:32,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 149 states [2021-05-06 11:29:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-05-06 11:29:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:29:32,759 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:33,652 INFO L93 Difference]: Finished difference Result 312 states and 312 transitions. [2021-05-06 11:29:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-05-06 11:29:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2021-05-06 11:29:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:33,653 INFO L225 Difference]: With dead ends: 312 [2021-05-06 11:29:33,653 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 11:29:33,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 7168.7ms TimeCoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2021-05-06 11:29:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 11:29:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2021-05-06 11:29:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0033333333333334) internal successors, (301), 300 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2021-05-06 11:29:33,657 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2021-05-06 11:29:33,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:33,657 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2021-05-06 11:29:33,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2021-05-06 11:29:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-05-06 11:29:33,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:33,658 INFO L523 BasicCegarLoop]: trace histogram [146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:33,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-05-06 11:29:33,658 INFO L428 AbstractCegarLoop]: === Iteration 148 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1250613986, now seen corresponding path program 146 times [2021-05-06 11:29:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:33,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997007576] [2021-05-06 11:29:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:33,662 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:33,662 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:33,662 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:40,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:40,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:40,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997007576] [2021-05-06 11:29:40,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [997007576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:40,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:40,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2021-05-06 11:29:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736260467] [2021-05-06 11:29:40,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 150 states [2021-05-06 11:29:40,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-05-06 11:29:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:29:40,935 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:41,609 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2021-05-06 11:29:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-06 11:29:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2021-05-06 11:29:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:41,610 INFO L225 Difference]: With dead ends: 314 [2021-05-06 11:29:41,610 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 11:29:41,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7150.1ms TimeCoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2021-05-06 11:29:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 11:29:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2021-05-06 11:29:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0033112582781456) internal successors, (303), 302 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2021-05-06 11:29:41,614 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2021-05-06 11:29:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:41,614 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2021-05-06 11:29:41,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2021-05-06 11:29:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-05-06 11:29:41,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:41,615 INFO L523 BasicCegarLoop]: trace histogram [147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:41,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-06 11:29:41,615 INFO L428 AbstractCegarLoop]: === Iteration 149 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -123285056, now seen corresponding path program 147 times [2021-05-06 11:29:41,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:41,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918704032] [2021-05-06 11:29:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:41,618 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:41,618 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:41,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:49,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918704032] [2021-05-06 11:29:49,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [918704032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:49,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:49,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2021-05-06 11:29:49,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789980879] [2021-05-06 11:29:49,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-06 11:29:49,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:49,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-06 11:29:49,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:29:49,082 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:49,981 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2021-05-06 11:29:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-06 11:29:49,982 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2021-05-06 11:29:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:49,982 INFO L225 Difference]: With dead ends: 316 [2021-05-06 11:29:49,982 INFO L226 Difference]: Without dead ends: 310 [2021-05-06 11:29:49,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 7333.7ms TimeCoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 11:29:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-06 11:29:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2021-05-06 11:29:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.0032894736842106) internal successors, (305), 304 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2021-05-06 11:29:49,986 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2021-05-06 11:29:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:49,986 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2021-05-06 11:29:49,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2021-05-06 11:29:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-05-06 11:29:49,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:49,987 INFO L523 BasicCegarLoop]: trace histogram [148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:49,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-05-06 11:29:49,987 INFO L428 AbstractCegarLoop]: === Iteration 150 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash 908058082, now seen corresponding path program 148 times [2021-05-06 11:29:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:49,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857258220] [2021-05-06 11:29:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:49,995 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:49,995 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:49,995 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:29:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:29:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:29:57,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:29:57,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857258220] [2021-05-06 11:29:57,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [857258220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:29:57,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:29:57,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2021-05-06 11:29:57,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528924079] [2021-05-06 11:29:57,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 152 states [2021-05-06 11:29:57,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:29:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-05-06 11:29:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:29:57,540 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:29:58,123 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2021-05-06 11:29:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-05-06 11:29:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2021-05-06 11:29:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:29:58,124 INFO L225 Difference]: With dead ends: 318 [2021-05-06 11:29:58,124 INFO L226 Difference]: Without dead ends: 312 [2021-05-06 11:29:58,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 7416.8ms TimeCoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2021-05-06 11:29:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-06 11:29:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2021-05-06 11:29:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0032679738562091) internal successors, (307), 306 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2021-05-06 11:29:58,128 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2021-05-06 11:29:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:29:58,128 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2021-05-06 11:29:58,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:29:58,128 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2021-05-06 11:29:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-05-06 11:29:58,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:29:58,129 INFO L523 BasicCegarLoop]: trace histogram [149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:29:58,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-06 11:29:58,129 INFO L428 AbstractCegarLoop]: === Iteration 151 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:29:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:29:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash -108631676, now seen corresponding path program 149 times [2021-05-06 11:29:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:29:58,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816768803] [2021-05-06 11:29:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:29:58,133 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:29:58,133 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:29:58,133 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:29:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:06,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:06,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816768803] [2021-05-06 11:30:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816768803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:06,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2021-05-06 11:30:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970142252] [2021-05-06 11:30:06,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 153 states [2021-05-06 11:30:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-05-06 11:30:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:30:06,236 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:07,355 INFO L93 Difference]: Finished difference Result 320 states and 320 transitions. [2021-05-06 11:30:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-05-06 11:30:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2021-05-06 11:30:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:07,356 INFO L225 Difference]: With dead ends: 320 [2021-05-06 11:30:07,356 INFO L226 Difference]: Without dead ends: 314 [2021-05-06 11:30:07,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 7959.8ms TimeCoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 11:30:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-06 11:30:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2021-05-06 11:30:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0032467532467533) internal successors, (309), 308 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:07,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2021-05-06 11:30:07,360 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2021-05-06 11:30:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:07,361 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2021-05-06 11:30:07,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:07,361 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2021-05-06 11:30:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-05-06 11:30:07,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:07,362 INFO L523 BasicCegarLoop]: trace histogram [150, 150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:07,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-05-06 11:30:07,362 INFO L428 AbstractCegarLoop]: === Iteration 152 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:07,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2105054374, now seen corresponding path program 150 times [2021-05-06 11:30:07,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:07,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639923893] [2021-05-06 11:30:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:07,368 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:07,368 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:07,368 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:16,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:16,037 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639923893] [2021-05-06 11:30:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [639923893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:16,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:16,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2021-05-06 11:30:16,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829634741] [2021-05-06 11:30:16,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 154 states [2021-05-06 11:30:16,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-05-06 11:30:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:30:16,039 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:16,870 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2021-05-06 11:30:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-05-06 11:30:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2021-05-06 11:30:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:16,871 INFO L225 Difference]: With dead ends: 322 [2021-05-06 11:30:16,871 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 11:30:16,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 8532.4ms TimeCoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 11:30:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 11:30:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-05-06 11:30:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0032258064516129) internal successors, (311), 310 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2021-05-06 11:30:16,875 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2021-05-06 11:30:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:16,875 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2021-05-06 11:30:16,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2021-05-06 11:30:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-05-06 11:30:16,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:16,876 INFO L523 BasicCegarLoop]: trace histogram [151, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:16,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-05-06 11:30:16,876 INFO L428 AbstractCegarLoop]: === Iteration 153 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash -846430392, now seen corresponding path program 151 times [2021-05-06 11:30:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:16,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557819737] [2021-05-06 11:30:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:16,880 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:16,880 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:16,880 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:25,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:25,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557819737] [2021-05-06 11:30:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [557819737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:25,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:25,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2021-05-06 11:30:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484875151] [2021-05-06 11:30:25,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 155 states [2021-05-06 11:30:25,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-05-06 11:30:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 11:30:25,154 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:26,026 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2021-05-06 11:30:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-05-06 11:30:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2021-05-06 11:30:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:26,027 INFO L225 Difference]: With dead ends: 324 [2021-05-06 11:30:26,027 INFO L226 Difference]: Without dead ends: 318 [2021-05-06 11:30:26,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 8136.9ms TimeCoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2021-05-06 11:30:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-06 11:30:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2021-05-06 11:30:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.0032051282051282) internal successors, (313), 312 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2021-05-06 11:30:26,031 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2021-05-06 11:30:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:26,032 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2021-05-06 11:30:26,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2021-05-06 11:30:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-05-06 11:30:26,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:26,033 INFO L523 BasicCegarLoop]: trace histogram [152, 152, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:26,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-06 11:30:26,033 INFO L428 AbstractCegarLoop]: === Iteration 154 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1750092138, now seen corresponding path program 152 times [2021-05-06 11:30:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:26,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481138867] [2021-05-06 11:30:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:26,036 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:26,036 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:26,037 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:34,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:34,469 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:34,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481138867] [2021-05-06 11:30:34,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481138867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:34,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:34,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2021-05-06 11:30:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462468013] [2021-05-06 11:30:34,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 156 states [2021-05-06 11:30:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-05-06 11:30:34,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 11:30:34,471 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:35,608 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2021-05-06 11:30:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-05-06 11:30:35,609 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2021-05-06 11:30:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:35,609 INFO L225 Difference]: With dead ends: 326 [2021-05-06 11:30:35,609 INFO L226 Difference]: Without dead ends: 320 [2021-05-06 11:30:35,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 8296.0ms TimeCoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 11:30:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-06 11:30:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2021-05-06 11:30:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0031847133757963) internal successors, (315), 314 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2021-05-06 11:30:35,613 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2021-05-06 11:30:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:35,613 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2021-05-06 11:30:35,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2021-05-06 11:30:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-05-06 11:30:35,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:35,614 INFO L523 BasicCegarLoop]: trace histogram [153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:35,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-05-06 11:30:35,614 INFO L428 AbstractCegarLoop]: === Iteration 155 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1632244492, now seen corresponding path program 153 times [2021-05-06 11:30:35,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:35,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004212577] [2021-05-06 11:30:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:35,619 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:35,619 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:35,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:44,579 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004212577] [2021-05-06 11:30:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004212577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:44,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:44,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2021-05-06 11:30:44,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582696233] [2021-05-06 11:30:44,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 157 states [2021-05-06 11:30:44,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-05-06 11:30:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 11:30:44,582 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:45,143 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2021-05-06 11:30:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-05-06 11:30:45,144 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2021-05-06 11:30:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:45,144 INFO L225 Difference]: With dead ends: 328 [2021-05-06 11:30:45,144 INFO L226 Difference]: Without dead ends: 322 [2021-05-06 11:30:45,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 8821.7ms TimeCoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2021-05-06 11:30:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-06 11:30:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2021-05-06 11:30:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.0031645569620253) internal successors, (317), 316 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2021-05-06 11:30:45,148 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2021-05-06 11:30:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2021-05-06 11:30:45,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2021-05-06 11:30:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 11:30:45,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:45,150 INFO L523 BasicCegarLoop]: trace histogram [154, 154, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:45,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-05-06 11:30:45,150 INFO L428 AbstractCegarLoop]: === Iteration 156 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash 49806382, now seen corresponding path program 154 times [2021-05-06 11:30:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:45,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725121301] [2021-05-06 11:30:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:45,163 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:45,163 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:45,164 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:53,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:30:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:30:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:30:53,704 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:30:53,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725121301] [2021-05-06 11:30:53,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [725121301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:30:53,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:30:53,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2021-05-06 11:30:53,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601272611] [2021-05-06 11:30:53,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 158 states [2021-05-06 11:30:53,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:30:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-05-06 11:30:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 11:30:53,706 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:30:54,637 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2021-05-06 11:30:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-06 11:30:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2021-05-06 11:30:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:30:54,638 INFO L225 Difference]: With dead ends: 330 [2021-05-06 11:30:54,638 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 11:30:54,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 8403.6ms TimeCoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2021-05-06 11:30:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 11:30:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 11:30:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0031446540880504) internal successors, (319), 318 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2021-05-06 11:30:54,642 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2021-05-06 11:30:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:30:54,642 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2021-05-06 11:30:54,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:30:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2021-05-06 11:30:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-05-06 11:30:54,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:30:54,643 INFO L523 BasicCegarLoop]: trace histogram [155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:30:54,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-06 11:30:54,643 INFO L428 AbstractCegarLoop]: === Iteration 157 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:30:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:30:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash -254794544, now seen corresponding path program 155 times [2021-05-06 11:30:54,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:30:54,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723790562] [2021-05-06 11:30:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:30:54,671 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:30:54,671 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:30:54,672 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:30:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:03,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:03,141 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:03,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723790562] [2021-05-06 11:31:03,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723790562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:03,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:03,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2021-05-06 11:31:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893113961] [2021-05-06 11:31:03,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-05-06 11:31:03,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-05-06 11:31:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 11:31:03,144 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:04,321 INFO L93 Difference]: Finished difference Result 332 states and 332 transitions. [2021-05-06 11:31:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-05-06 11:31:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2021-05-06 11:31:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:04,323 INFO L225 Difference]: With dead ends: 332 [2021-05-06 11:31:04,323 INFO L226 Difference]: Without dead ends: 326 [2021-05-06 11:31:04,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 8323.4ms TimeCoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 11:31:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-06 11:31:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2021-05-06 11:31:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.003125) internal successors, (321), 320 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2021-05-06 11:31:04,338 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2021-05-06 11:31:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:04,338 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2021-05-06 11:31:04,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2021-05-06 11:31:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-05-06 11:31:04,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:04,339 INFO L523 BasicCegarLoop]: trace histogram [156, 156, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:04,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-05-06 11:31:04,340 INFO L428 AbstractCegarLoop]: === Iteration 158 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash -918508302, now seen corresponding path program 156 times [2021-05-06 11:31:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:04,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404824724] [2021-05-06 11:31:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:04,344 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:04,344 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:04,345 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:12,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:12,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:12,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404824724] [2021-05-06 11:31:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [404824724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:12,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:12,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2021-05-06 11:31:12,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420211497] [2021-05-06 11:31:12,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 160 states [2021-05-06 11:31:12,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-05-06 11:31:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 11:31:12,977 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:13,994 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2021-05-06 11:31:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-05-06 11:31:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324 [2021-05-06 11:31:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:13,995 INFO L225 Difference]: With dead ends: 334 [2021-05-06 11:31:13,995 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 11:31:13,995 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 8482.2ms TimeCoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 11:31:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 11:31:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2021-05-06 11:31:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.0031055900621118) internal successors, (323), 322 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2021-05-06 11:31:13,999 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2021-05-06 11:31:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:13,999 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2021-05-06 11:31:13,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2021-05-06 11:31:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-05-06 11:31:14,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:14,000 INFO L523 BasicCegarLoop]: trace histogram [157, 157, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:14,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-06 11:31:14,000 INFO L428 AbstractCegarLoop]: === Iteration 159 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1202697364, now seen corresponding path program 157 times [2021-05-06 11:31:14,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:14,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102919555] [2021-05-06 11:31:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:14,003 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:14,003 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:14,004 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:22,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:22,470 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102919555] [2021-05-06 11:31:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102919555] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:22,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:22,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2021-05-06 11:31:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280860159] [2021-05-06 11:31:22,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-06 11:31:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-06 11:31:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 11:31:22,473 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:23,051 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2021-05-06 11:31:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-06 11:31:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2021-05-06 11:31:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:23,052 INFO L225 Difference]: With dead ends: 336 [2021-05-06 11:31:23,052 INFO L226 Difference]: Without dead ends: 330 [2021-05-06 11:31:23,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8331.7ms TimeCoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 11:31:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-06 11:31:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2021-05-06 11:31:23,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0030864197530864) internal successors, (325), 324 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2021-05-06 11:31:23,056 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2021-05-06 11:31:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:23,056 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2021-05-06 11:31:23,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2021-05-06 11:31:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-05-06 11:31:23,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:23,057 INFO L523 BasicCegarLoop]: trace histogram [158, 158, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:23,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-05-06 11:31:23,058 INFO L428 AbstractCegarLoop]: === Iteration 160 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -428123210, now seen corresponding path program 158 times [2021-05-06 11:31:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:23,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929227042] [2021-05-06 11:31:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:23,075 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:23,075 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:23,076 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:31,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:31,750 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:31,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929227042] [2021-05-06 11:31:31,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929227042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:31,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:31,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2021-05-06 11:31:31,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205755748] [2021-05-06 11:31:31,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 162 states [2021-05-06 11:31:31,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-05-06 11:31:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 11:31:31,753 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:32,394 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2021-05-06 11:31:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-05-06 11:31:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 328 [2021-05-06 11:31:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:32,395 INFO L225 Difference]: With dead ends: 338 [2021-05-06 11:31:32,395 INFO L226 Difference]: Without dead ends: 332 [2021-05-06 11:31:32,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 8529.3ms TimeCoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2021-05-06 11:31:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-06 11:31:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2021-05-06 11:31:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2021-05-06 11:31:32,399 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2021-05-06 11:31:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:32,399 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2021-05-06 11:31:32,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2021-05-06 11:31:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-05-06 11:31:32,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:32,401 INFO L523 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:32,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2021-05-06 11:31:32,401 INFO L428 AbstractCegarLoop]: === Iteration 161 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 16368216, now seen corresponding path program 159 times [2021-05-06 11:31:32,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:32,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833738155] [2021-05-06 11:31:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:32,404 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:32,404 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:32,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:41,134 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:41,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833738155] [2021-05-06 11:31:41,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833738155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:41,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:41,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2021-05-06 11:31:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522304632] [2021-05-06 11:31:41,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 163 states [2021-05-06 11:31:41,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-05-06 11:31:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 11:31:41,137 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:42,007 INFO L93 Difference]: Finished difference Result 340 states and 340 transitions. [2021-05-06 11:31:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-05-06 11:31:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2021-05-06 11:31:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:42,008 INFO L225 Difference]: With dead ends: 340 [2021-05-06 11:31:42,008 INFO L226 Difference]: Without dead ends: 334 [2021-05-06 11:31:42,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8593.6ms TimeCoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2021-05-06 11:31:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-06 11:31:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2021-05-06 11:31:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.0030487804878048) internal successors, (329), 328 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2021-05-06 11:31:42,012 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2021-05-06 11:31:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:42,012 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2021-05-06 11:31:42,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2021-05-06 11:31:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-05-06 11:31:42,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:42,013 INFO L523 BasicCegarLoop]: trace histogram [160, 160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:42,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-06 11:31:42,013 INFO L428 AbstractCegarLoop]: === Iteration 162 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1970866298, now seen corresponding path program 160 times [2021-05-06 11:31:42,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:42,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465113180] [2021-05-06 11:31:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:42,017 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:42,017 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:42,017 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:50,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:31:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:31:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:31:50,694 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:31:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465113180] [2021-05-06 11:31:50,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1465113180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:31:50,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:31:50,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2021-05-06 11:31:50,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620672086] [2021-05-06 11:31:50,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 164 states [2021-05-06 11:31:50,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:31:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-05-06 11:31:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 11:31:50,697 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:31:51,830 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2021-05-06 11:31:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-05-06 11:31:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 332 [2021-05-06 11:31:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:31:51,842 INFO L225 Difference]: With dead ends: 342 [2021-05-06 11:31:51,842 INFO L226 Difference]: Without dead ends: 336 [2021-05-06 11:31:51,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 8538.8ms TimeCoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2021-05-06 11:31:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-06 11:31:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2021-05-06 11:31:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.003030303030303) internal successors, (331), 330 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2021-05-06 11:31:51,846 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2021-05-06 11:31:51,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:31:51,846 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2021-05-06 11:31:51,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:31:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2021-05-06 11:31:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-05-06 11:31:51,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:31:51,847 INFO L523 BasicCegarLoop]: trace histogram [161, 161, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:31:51,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2021-05-06 11:31:51,847 INFO L428 AbstractCegarLoop]: === Iteration 163 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:31:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:31:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash -952152548, now seen corresponding path program 161 times [2021-05-06 11:31:51,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:31:51,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136922671] [2021-05-06 11:31:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:31:51,850 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:31:51,850 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:31:51,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:31:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:00,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:00,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:00,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136922671] [2021-05-06 11:32:00,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [136922671] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:00,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:00,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2021-05-06 11:32:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694371976] [2021-05-06 11:32:00,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 165 states [2021-05-06 11:32:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:00,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-05-06 11:32:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 11:32:00,693 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:01,859 INFO L93 Difference]: Finished difference Result 344 states and 344 transitions. [2021-05-06 11:32:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-05-06 11:32:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2021-05-06 11:32:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:01,860 INFO L225 Difference]: With dead ends: 344 [2021-05-06 11:32:01,860 INFO L226 Difference]: Without dead ends: 338 [2021-05-06 11:32:01,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8700.5ms TimeCoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2021-05-06 11:32:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-06 11:32:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2021-05-06 11:32:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0030120481927711) internal successors, (333), 332 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2021-05-06 11:32:01,864 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2021-05-06 11:32:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:01,864 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2021-05-06 11:32:01,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2021-05-06 11:32:01,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-05-06 11:32:01,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:01,866 INFO L523 BasicCegarLoop]: trace histogram [162, 162, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:01,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-06 11:32:01,866 INFO L428 AbstractCegarLoop]: === Iteration 164 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1064651970, now seen corresponding path program 162 times [2021-05-06 11:32:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:01,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919157597] [2021-05-06 11:32:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:01,871 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:01,871 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:01,871 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:11,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:11,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:11,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919157597] [2021-05-06 11:32:11,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919157597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:11,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:11,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2021-05-06 11:32:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251924603] [2021-05-06 11:32:11,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 166 states [2021-05-06 11:32:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-05-06 11:32:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 11:32:11,035 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:12,326 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2021-05-06 11:32:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-05-06 11:32:12,327 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2021-05-06 11:32:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:12,327 INFO L225 Difference]: With dead ends: 346 [2021-05-06 11:32:12,327 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 11:32:12,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 9015.8ms TimeCoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 11:32:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 11:32:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2021-05-06 11:32:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.0029940119760479) internal successors, (335), 334 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2021-05-06 11:32:12,332 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2021-05-06 11:32:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:12,332 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2021-05-06 11:32:12,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2021-05-06 11:32:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-05-06 11:32:12,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:12,333 INFO L523 BasicCegarLoop]: trace histogram [163, 163, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:12,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2021-05-06 11:32:12,333 INFO L428 AbstractCegarLoop]: === Iteration 165 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1802414112, now seen corresponding path program 163 times [2021-05-06 11:32:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790716656] [2021-05-06 11:32:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:12,339 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:12,339 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:12,340 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:21,507 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:21,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790716656] [2021-05-06 11:32:21,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [790716656] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:21,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:21,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2021-05-06 11:32:21,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288491339] [2021-05-06 11:32:21,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 167 states [2021-05-06 11:32:21,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-05-06 11:32:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 11:32:21,510 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:22,802 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2021-05-06 11:32:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-05-06 11:32:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2021-05-06 11:32:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:22,803 INFO L225 Difference]: With dead ends: 348 [2021-05-06 11:32:22,803 INFO L226 Difference]: Without dead ends: 342 [2021-05-06 11:32:22,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 9025.4ms TimeCoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2021-05-06 11:32:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-06 11:32:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2021-05-06 11:32:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.0029761904761905) internal successors, (337), 336 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2021-05-06 11:32:22,807 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2021-05-06 11:32:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:22,808 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2021-05-06 11:32:22,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2021-05-06 11:32:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-05-06 11:32:22,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:22,809 INFO L523 BasicCegarLoop]: trace histogram [164, 164, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:22,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2021-05-06 11:32:22,809 INFO L428 AbstractCegarLoop]: === Iteration 166 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2122228734, now seen corresponding path program 164 times [2021-05-06 11:32:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:22,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020663624] [2021-05-06 11:32:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:22,812 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:22,812 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:22,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:31,926 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020663624] [2021-05-06 11:32:31,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020663624] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:31,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:31,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2021-05-06 11:32:31,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358790810] [2021-05-06 11:32:31,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 168 states [2021-05-06 11:32:31,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-05-06 11:32:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 11:32:31,929 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:33,120 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2021-05-06 11:32:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-05-06 11:32:33,120 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2021-05-06 11:32:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:33,121 INFO L225 Difference]: With dead ends: 350 [2021-05-06 11:32:33,121 INFO L226 Difference]: Without dead ends: 344 [2021-05-06 11:32:33,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 8962.7ms TimeCoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 11:32:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-06 11:32:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2021-05-06 11:32:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.0029585798816567) internal successors, (339), 338 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2021-05-06 11:32:33,125 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2021-05-06 11:32:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:33,125 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2021-05-06 11:32:33,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2021-05-06 11:32:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-05-06 11:32:33,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:33,126 INFO L523 BasicCegarLoop]: trace histogram [165, 165, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:33,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-06 11:32:33,126 INFO L428 AbstractCegarLoop]: === Iteration 167 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -226435164, now seen corresponding path program 165 times [2021-05-06 11:32:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:33,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464492497] [2021-05-06 11:32:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:33,129 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:33,130 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:33,130 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:42,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:42,421 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:42,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464492497] [2021-05-06 11:32:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464492497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2021-05-06 11:32:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990959960] [2021-05-06 11:32:42,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 169 states [2021-05-06 11:32:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2021-05-06 11:32:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 11:32:42,424 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:43,466 INFO L93 Difference]: Finished difference Result 352 states and 352 transitions. [2021-05-06 11:32:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-05-06 11:32:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2021-05-06 11:32:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:43,468 INFO L225 Difference]: With dead ends: 352 [2021-05-06 11:32:43,468 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 11:32:43,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 9148.8ms TimeCoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 11:32:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 11:32:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2021-05-06 11:32:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.0029411764705882) internal successors, (341), 340 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2021-05-06 11:32:43,472 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2021-05-06 11:32:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:43,472 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2021-05-06 11:32:43,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2021-05-06 11:32:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-05-06 11:32:43,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:43,473 INFO L523 BasicCegarLoop]: trace histogram [166, 166, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:43,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2021-05-06 11:32:43,473 INFO L428 AbstractCegarLoop]: === Iteration 168 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash 565052102, now seen corresponding path program 166 times [2021-05-06 11:32:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:43,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987378073] [2021-05-06 11:32:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:43,476 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:43,476 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:43,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:32:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:32:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:32:52,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:32:52,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987378073] [2021-05-06 11:32:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [987378073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:32:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:32:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2021-05-06 11:32:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770322201] [2021-05-06 11:32:52,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 170 states [2021-05-06 11:32:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:32:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2021-05-06 11:32:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2021-05-06 11:32:52,835 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:32:53,628 INFO L93 Difference]: Finished difference Result 354 states and 354 transitions. [2021-05-06 11:32:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-05-06 11:32:53,629 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 344 [2021-05-06 11:32:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:32:53,629 INFO L225 Difference]: With dead ends: 354 [2021-05-06 11:32:53,629 INFO L226 Difference]: Without dead ends: 348 [2021-05-06 11:32:53,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 9212.4ms TimeCoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2021-05-06 11:32:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-06 11:32:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2021-05-06 11:32:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.0029239766081872) internal successors, (343), 342 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2021-05-06 11:32:53,633 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2021-05-06 11:32:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:32:53,634 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2021-05-06 11:32:53,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:32:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2021-05-06 11:32:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-05-06 11:32:53,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:32:53,635 INFO L523 BasicCegarLoop]: trace histogram [167, 167, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:32:53,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-06 11:32:53,635 INFO L428 AbstractCegarLoop]: === Iteration 169 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:32:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:32:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash 975103336, now seen corresponding path program 167 times [2021-05-06 11:32:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:32:53,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663189094] [2021-05-06 11:32:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:32:53,638 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:32:53,638 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:32:53,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:32:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:03,125 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:03,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663189094] [2021-05-06 11:33:03,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [663189094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:03,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:03,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2021-05-06 11:33:03,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742416434] [2021-05-06 11:33:03,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 171 states [2021-05-06 11:33:03,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-05-06 11:33:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 11:33:03,128 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:03,754 INFO L93 Difference]: Finished difference Result 356 states and 356 transitions. [2021-05-06 11:33:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-05-06 11:33:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2021-05-06 11:33:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:03,755 INFO L225 Difference]: With dead ends: 356 [2021-05-06 11:33:03,755 INFO L226 Difference]: Without dead ends: 350 [2021-05-06 11:33:03,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 9334.0ms TimeCoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 11:33:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-06 11:33:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2021-05-06 11:33:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.002906976744186) internal successors, (345), 344 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2021-05-06 11:33:03,759 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 346 [2021-05-06 11:33:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:03,759 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2021-05-06 11:33:03,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2021-05-06 11:33:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-05-06 11:33:03,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:03,761 INFO L523 BasicCegarLoop]: trace histogram [168, 168, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:03,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2021-05-06 11:33:03,761 INFO L428 AbstractCegarLoop]: === Iteration 170 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -102652022, now seen corresponding path program 168 times [2021-05-06 11:33:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:03,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678845378] [2021-05-06 11:33:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:03,764 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:03,764 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:03,764 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:13,387 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678845378] [2021-05-06 11:33:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678845378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:13,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:13,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2021-05-06 11:33:13,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136916052] [2021-05-06 11:33:13,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 172 states [2021-05-06 11:33:13,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2021-05-06 11:33:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2021-05-06 11:33:13,390 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:14,435 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2021-05-06 11:33:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-05-06 11:33:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 348 [2021-05-06 11:33:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:14,436 INFO L225 Difference]: With dead ends: 358 [2021-05-06 11:33:14,436 INFO L226 Difference]: Without dead ends: 352 [2021-05-06 11:33:14,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 9476.3ms TimeCoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2021-05-06 11:33:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-06 11:33:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2021-05-06 11:33:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0028901734104045) internal successors, (347), 346 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2021-05-06 11:33:14,440 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 348 [2021-05-06 11:33:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:14,440 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2021-05-06 11:33:14,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2021-05-06 11:33:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-05-06 11:33:14,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:14,442 INFO L523 BasicCegarLoop]: trace histogram [169, 169, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:14,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-05-06 11:33:14,442 INFO L428 AbstractCegarLoop]: === Iteration 171 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash -738432724, now seen corresponding path program 169 times [2021-05-06 11:33:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:14,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028158303] [2021-05-06 11:33:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:14,445 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:14,445 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:14,446 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:24,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:24,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:24,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028158303] [2021-05-06 11:33:24,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028158303] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:24,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:24,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2021-05-06 11:33:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317414723] [2021-05-06 11:33:24,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 173 states [2021-05-06 11:33:24,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-05-06 11:33:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 11:33:24,307 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:25,738 INFO L93 Difference]: Finished difference Result 360 states and 360 transitions. [2021-05-06 11:33:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-05-06 11:33:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2021-05-06 11:33:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:25,739 INFO L225 Difference]: With dead ends: 360 [2021-05-06 11:33:25,739 INFO L226 Difference]: Without dead ends: 354 [2021-05-06 11:33:25,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 9703.5ms TimeCoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2021-05-06 11:33:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-06 11:33:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2021-05-06 11:33:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.0028735632183907) internal successors, (349), 348 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2021-05-06 11:33:25,743 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 350 [2021-05-06 11:33:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2021-05-06 11:33:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2021-05-06 11:33:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-05-06 11:33:25,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:25,745 INFO L523 BasicCegarLoop]: trace histogram [170, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:25,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-06 11:33:25,745 INFO L428 AbstractCegarLoop]: === Iteration 172 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1838331314, now seen corresponding path program 170 times [2021-05-06 11:33:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494976064] [2021-05-06 11:33:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:25,748 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:25,748 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:25,748 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:35,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:35,553 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494976064] [2021-05-06 11:33:35,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494976064] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:35,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:35,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2021-05-06 11:33:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937956949] [2021-05-06 11:33:35,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 174 states [2021-05-06 11:33:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2021-05-06 11:33:35,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2021-05-06 11:33:35,556 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:36,906 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2021-05-06 11:33:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-05-06 11:33:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 352 [2021-05-06 11:33:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:36,907 INFO L225 Difference]: With dead ends: 362 [2021-05-06 11:33:36,907 INFO L226 Difference]: Without dead ends: 356 [2021-05-06 11:33:36,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 9652.9ms TimeCoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2021-05-06 11:33:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-06 11:33:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2021-05-06 11:33:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.002857142857143) internal successors, (351), 350 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2021-05-06 11:33:36,912 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 352 [2021-05-06 11:33:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:36,912 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2021-05-06 11:33:36,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2021-05-06 11:33:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-05-06 11:33:36,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:36,913 INFO L523 BasicCegarLoop]: trace histogram [171, 171, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:36,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-05-06 11:33:36,913 INFO L428 AbstractCegarLoop]: === Iteration 173 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2016045808, now seen corresponding path program 171 times [2021-05-06 11:33:36,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:36,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326244979] [2021-05-06 11:33:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:36,917 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:36,917 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:36,917 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:46,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:46,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:46,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326244979] [2021-05-06 11:33:46,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [326244979] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:46,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:46,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [175] imperfect sequences [] total 175 [2021-05-06 11:33:46,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545216446] [2021-05-06 11:33:46,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 175 states [2021-05-06 11:33:46,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-05-06 11:33:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15053, Invalid=15397, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 11:33:46,849 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:47,470 INFO L93 Difference]: Finished difference Result 364 states and 364 transitions. [2021-05-06 11:33:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-05-06 11:33:47,471 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2021-05-06 11:33:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:47,471 INFO L225 Difference]: With dead ends: 364 [2021-05-06 11:33:47,471 INFO L226 Difference]: Without dead ends: 358 [2021-05-06 11:33:47,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9776.2ms TimeCoverageRelationStatistics Valid=15053, Invalid=15397, Unknown=0, NotChecked=0, Total=30450 [2021-05-06 11:33:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-06 11:33:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2021-05-06 11:33:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.0028409090909092) internal successors, (353), 352 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2021-05-06 11:33:47,476 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 354 [2021-05-06 11:33:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:47,476 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2021-05-06 11:33:47,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2021-05-06 11:33:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-05-06 11:33:47,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:47,477 INFO L523 BasicCegarLoop]: trace histogram [172, 172, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:47,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-06 11:33:47,477 INFO L428 AbstractCegarLoop]: === Iteration 174 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:47,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -484316398, now seen corresponding path program 172 times [2021-05-06 11:33:47,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:47,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734163893] [2021-05-06 11:33:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:47,481 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:47,481 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:47,481 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:57,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:33:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:33:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:33:57,602 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:33:57,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734163893] [2021-05-06 11:33:57,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [734163893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:33:57,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:33:57,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2021-05-06 11:33:57,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621741338] [2021-05-06 11:33:57,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 176 states [2021-05-06 11:33:57,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:33:57,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2021-05-06 11:33:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2021-05-06 11:33:57,604 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:33:59,140 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2021-05-06 11:33:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-05-06 11:33:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 356 [2021-05-06 11:33:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:33:59,142 INFO L225 Difference]: With dead ends: 366 [2021-05-06 11:33:59,142 INFO L226 Difference]: Without dead ends: 360 [2021-05-06 11:33:59,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 9967.0ms TimeCoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2021-05-06 11:33:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-06 11:33:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 359. [2021-05-06 11:33:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.002824858757062) internal successors, (355), 354 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2021-05-06 11:33:59,146 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 356 [2021-05-06 11:33:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:33:59,146 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2021-05-06 11:33:59,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:33:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2021-05-06 11:33:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-05-06 11:33:59,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:33:59,147 INFO L523 BasicCegarLoop]: trace histogram [173, 173, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:33:59,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-06 11:33:59,147 INFO L428 AbstractCegarLoop]: === Iteration 175 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:33:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:33:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1849289396, now seen corresponding path program 173 times [2021-05-06 11:33:59,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:33:59,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848094615] [2021-05-06 11:33:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:33:59,153 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:33:59,153 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:33:59,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:33:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:10,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:10,345 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848094615] [2021-05-06 11:34:10,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [848094615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:10,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:10,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2021-05-06 11:34:10,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914186263] [2021-05-06 11:34:10,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 177 states [2021-05-06 11:34:10,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2021-05-06 11:34:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15402, Invalid=15750, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 11:34:10,348 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:11,829 INFO L93 Difference]: Finished difference Result 368 states and 368 transitions. [2021-05-06 11:34:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-05-06 11:34:11,829 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2021-05-06 11:34:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:11,830 INFO L225 Difference]: With dead ends: 368 [2021-05-06 11:34:11,830 INFO L226 Difference]: Without dead ends: 362 [2021-05-06 11:34:11,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 11026.6ms TimeCoverageRelationStatistics Valid=15402, Invalid=15750, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 11:34:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-06 11:34:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 361. [2021-05-06 11:34:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 356 states have (on average 1.002808988764045) internal successors, (357), 356 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 361 transitions. [2021-05-06 11:34:11,834 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 361 transitions. Word has length 358 [2021-05-06 11:34:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:11,834 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 361 transitions. [2021-05-06 11:34:11,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 177 states, 177 states have (on average 2.0) internal successors, (354), 176 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 361 transitions. [2021-05-06 11:34:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-05-06 11:34:11,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:11,836 INFO L523 BasicCegarLoop]: trace histogram [174, 174, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:11,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-05-06 11:34:11,836 INFO L428 AbstractCegarLoop]: === Iteration 176 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1823438378, now seen corresponding path program 174 times [2021-05-06 11:34:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812032131] [2021-05-06 11:34:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:11,839 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:11,839 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:11,840 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:22,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:22,023 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812032131] [2021-05-06 11:34:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [812032131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:22,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:22,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [178] imperfect sequences [] total 178 [2021-05-06 11:34:22,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123082606] [2021-05-06 11:34:22,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 178 states [2021-05-06 11:34:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-05-06 11:34:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2021-05-06 11:34:22,026 INFO L87 Difference]: Start difference. First operand 361 states and 361 transitions. Second operand has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:22,782 INFO L93 Difference]: Finished difference Result 370 states and 370 transitions. [2021-05-06 11:34:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-05-06 11:34:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 360 [2021-05-06 11:34:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:22,783 INFO L225 Difference]: With dead ends: 370 [2021-05-06 11:34:22,783 INFO L226 Difference]: Without dead ends: 364 [2021-05-06 11:34:22,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 10017.1ms TimeCoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2021-05-06 11:34:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-06 11:34:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 363. [2021-05-06 11:34:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 358 states have (on average 1.0027932960893855) internal successors, (359), 358 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2021-05-06 11:34:22,788 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 360 [2021-05-06 11:34:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:22,788 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2021-05-06 11:34:22,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 178 states, 178 states have (on average 2.0) internal successors, (356), 177 states have internal predecessors, (356), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2021-05-06 11:34:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-05-06 11:34:22,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:22,789 INFO L523 BasicCegarLoop]: trace histogram [175, 175, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:22,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-05-06 11:34:22,789 INFO L428 AbstractCegarLoop]: === Iteration 177 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -851711880, now seen corresponding path program 175 times [2021-05-06 11:34:22,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:22,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322355849] [2021-05-06 11:34:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:22,792 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:22,792 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:22,793 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:34,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:34:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:34:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:34:34,099 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:34:34,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322355849] [2021-05-06 11:34:34,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [322355849] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:34:34,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:34:34,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2021-05-06 11:34:34,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135553759] [2021-05-06 11:34:34,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-05-06 11:34:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:34:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-05-06 11:34:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15755, Invalid=16107, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 11:34:34,101 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:34:35,802 INFO L93 Difference]: Finished difference Result 372 states and 372 transitions. [2021-05-06 11:34:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2021-05-06 11:34:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2021-05-06 11:34:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:34:35,803 INFO L225 Difference]: With dead ends: 372 [2021-05-06 11:34:35,803 INFO L226 Difference]: Without dead ends: 366 [2021-05-06 11:34:35,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 11147.8ms TimeCoverageRelationStatistics Valid=15755, Invalid=16107, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 11:34:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-06 11:34:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2021-05-06 11:34:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.0027777777777778) internal successors, (361), 360 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 365 transitions. [2021-05-06 11:34:35,807 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 365 transitions. Word has length 362 [2021-05-06 11:34:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:34:35,807 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 365 transitions. [2021-05-06 11:34:35,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 179 states, 179 states have (on average 2.0) internal successors, (358), 178 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:34:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 365 transitions. [2021-05-06 11:34:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-05-06 11:34:35,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:34:35,809 INFO L523 BasicCegarLoop]: trace histogram [176, 176, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:34:35,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-05-06 11:34:35,809 INFO L428 AbstractCegarLoop]: === Iteration 178 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:34:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:34:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 969549466, now seen corresponding path program 176 times [2021-05-06 11:34:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:34:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508981101] [2021-05-06 11:34:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:34:35,812 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:34:35,812 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:34:35,813 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:34:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat