/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-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:29:28,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:29:28,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:29:28,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:29:28,879 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:29:28,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:29:28,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:29:28,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:29:28,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:29:28,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:29:28,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:29:28,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:29:28,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:29:28,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:29:28,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:29:28,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:29:28,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:29:28,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:29:28,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:28,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:29:28,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:29:28,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:29:28,902 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:29:28,902 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:29:29,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:29:29,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:29:29,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:29:29,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:29:29,269 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:29:29,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2021-05-02 23:29:29,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6e797a6/9ac507a8c0254368bcda98bbf9adf90a/FLAG446851dc1 [2021-05-02 23:29:29,831 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:29:29,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2021-05-02 23:29:29,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6e797a6/9ac507a8c0254368bcda98bbf9adf90a/FLAG446851dc1 [2021-05-02 23:29:30,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6e797a6/9ac507a8c0254368bcda98bbf9adf90a [2021-05-02 23:29:30,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:29:30,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:29:30,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:30,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:29:30,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:29:30,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9b156b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30, skipping insertion in model container [2021-05-02 23:29:30,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:29:30,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:29:30,520 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-crafted/simple_array_index_value_1-1.i[834,847] [2021-05-02 23:29:30,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:30,548 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:29:30,563 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-crafted/simple_array_index_value_1-1.i[834,847] [2021-05-02 23:29:30,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:30,590 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:29:30,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30 WrapperNode [2021-05-02 23:29:30,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:30,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:29:30,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:29:30,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:29:30,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... [2021-05-02 23:29:30,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:29:30,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:29:30,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:29:30,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:29:30,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:30,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:29:30,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:29:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:29:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:29:30,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:29:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:29:30,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:29:30,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:29:30,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:29:30,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:29:30,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:29:30,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:29:30,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:29:30,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:29:31,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:29:31,043 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:29:31,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:31 BoogieIcfgContainer [2021-05-02 23:29:31,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:29:31,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:29:31,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:29:31,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:29:31,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:29:30" (1/3) ... [2021-05-02 23:29:31,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16755605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:31, skipping insertion in model container [2021-05-02 23:29:31,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:30" (2/3) ... [2021-05-02 23:29:31,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16755605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:31, skipping insertion in model container [2021-05-02 23:29:31,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:31" (3/3) ... [2021-05-02 23:29:31,064 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2021-05-02 23:29:31,070 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:29:31,073 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:29:31,108 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:29:31,138 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:29:31,138 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:29:31,138 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:29:31,139 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:29:31,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:29:31,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:29:31,139 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:29:31,139 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:29:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:29:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:29:31,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:31,185 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:31,185 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 56847072, now seen corresponding path program 1 times [2021-05-02 23:29:31,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:31,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294726977] [2021-05-02 23:29:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:31,267 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:31,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:31,483 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294726977] [2021-05-02 23:29:31,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294726977] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:31,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:31,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:29:31,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375436339] [2021-05-02 23:29:31,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:29:31,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:31,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:29:31,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:31,504 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-05-02 23:29:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:31,588 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-05-02 23:29:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:29:31,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2021-05-02 23:29:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:31,596 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:29:31,596 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:29:31,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:29:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 23:29:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-02 23:29:31,647 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-05-02 23:29:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:31,648 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-02 23:29:31,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-05-02 23:29:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-02 23:29:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:29:31,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:31,649 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:31,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:29:31,650 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1810080346, now seen corresponding path program 1 times [2021-05-02 23:29:31,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:31,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842528294] [2021-05-02 23:29:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:31,664 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:31,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:31,794 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842528294] [2021-05-02 23:29:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [842528294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:31,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:29:31,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750382843] [2021-05-02 23:29:31,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:29:31,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:29:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:29:31,798 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-05-02 23:29:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:31,894 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 23:29:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:29:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-05-02 23:29:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:31,896 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:29:31,896 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:29:31,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:29:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:29:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-05-02 23:29:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 23:29:31,907 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2021-05-02 23:29:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:31,907 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 23:29:31,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-05-02 23:29:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 23:29:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:29:31,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:31,908 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:31,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:29:31,909 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1733475192, now seen corresponding path program 1 times [2021-05-02 23:29:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:31,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266981690] [2021-05-02 23:29:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:31,927 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:31,929 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:32,014 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:32,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266981690] [2021-05-02 23:29:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266981690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:32,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:32,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:29:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426241721] [2021-05-02 23:29:32,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:29:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:29:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:29:32,016 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2021-05-02 23:29:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:32,133 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-05-02 23:29:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:29:32,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2021-05-02 23:29:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:32,134 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:29:32,135 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:29:32,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:29:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:29:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-05-02 23:29:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 23:29:32,147 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2021-05-02 23:29:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:32,147 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 23:29:32,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2021-05-02 23:29:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 23:29:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:29:32,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:32,148 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:32,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:29:32,148 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1130366230, now seen corresponding path program 2 times [2021-05-02 23:29:32,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:32,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010033560] [2021-05-02 23:29:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:32,160 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:32,164 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:32,324 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010033560] [2021-05-02 23:29:32,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010033560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:32,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:32,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:29:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496519001] [2021-05-02 23:29:32,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:29:32,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:29:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:29:32,335 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-05-02 23:29:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:32,555 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-05-02 23:29:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:29:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 [2021-05-02 23:29:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:32,560 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:29:32,560 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 23:29:32,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:29:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 23:29:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-05-02 23:29:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:29:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 23:29:32,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2021-05-02 23:29:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:32,586 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 23:29:32,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-05-02 23:29:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 23:29:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:29:32,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:32,588 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:32,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:29:32,589 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1363238708, now seen corresponding path program 3 times [2021-05-02 23:29:32,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:32,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669532441] [2021-05-02 23:29:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:32,602 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:32,604 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:32,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:32,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669532441] [2021-05-02 23:29:32,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [669532441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:32,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:32,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:29:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698931900] [2021-05-02 23:29:32,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:29:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:29:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:32,777 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-05-02 23:29:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:32,955 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-05-02 23:29:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:29:32,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 [2021-05-02 23:29:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:32,957 INFO L225 Difference]: With dead ends: 73 [2021-05-02 23:29:32,958 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:29:32,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:32,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:29:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2021-05-02 23:29:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:29:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 23:29:32,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2021-05-02 23:29:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:32,967 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 23:29:32,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-05-02 23:29:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 23:29:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:29:32,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:32,969 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:32,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:29:32,969 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1815390674, now seen corresponding path program 4 times [2021-05-02 23:29:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:32,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976981749] [2021-05-02 23:29:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:32,978 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:32,979 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:33,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:33,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976981749] [2021-05-02 23:29:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [976981749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:33,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:33,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:29:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731259269] [2021-05-02 23:29:33,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:29:33,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:33,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:29:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:29:33,119 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-05-02 23:29:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:33,345 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-05-02 23:29:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:29:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 [2021-05-02 23:29:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:33,348 INFO L225 Difference]: With dead ends: 85 [2021-05-02 23:29:33,348 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:29:33,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:29:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:29:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-05-02 23:29:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:29:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-05-02 23:29:33,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2021-05-02 23:29:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:33,374 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-05-02 23:29:33,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-05-02 23:29:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-05-02 23:29:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:29:33,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:33,375 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:33,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:29:33,375 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1753234192, now seen corresponding path program 5 times [2021-05-02 23:29:33,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:33,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220086146] [2021-05-02 23:29:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:33,387 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:33,389 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:33,595 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:33,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220086146] [2021-05-02 23:29:33,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220086146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:33,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:33,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:29:33,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366521394] [2021-05-02 23:29:33,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:29:33,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:29:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:33,597 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-05-02 23:29:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:33,859 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-05-02 23:29:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:29:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 [2021-05-02 23:29:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:33,861 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:29:33,861 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:29:33,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:29:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2021-05-02 23:29:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:29:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-02 23:29:33,870 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2021-05-02 23:29:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:33,870 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-02 23:29:33,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-05-02 23:29:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-02 23:29:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:29:33,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:33,871 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:33,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:29:33,871 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash -477139086, now seen corresponding path program 6 times [2021-05-02 23:29:33,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:33,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145787518] [2021-05-02 23:29:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:33,877 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:33,879 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:34,022 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:34,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145787518] [2021-05-02 23:29:34,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145787518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:34,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:34,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:29:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349860645] [2021-05-02 23:29:34,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:29:34,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:29:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:29:34,024 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2021-05-02 23:29:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:34,301 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-05-02 23:29:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:29:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 [2021-05-02 23:29:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:34,303 INFO L225 Difference]: With dead ends: 109 [2021-05-02 23:29:34,303 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:29:34,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:29:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:29:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-05-02 23:29:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:29:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-05-02 23:29:34,313 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2021-05-02 23:29:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:34,313 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-05-02 23:29:34,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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) [2021-05-02 23:29:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-05-02 23:29:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:29:34,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:34,316 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:34,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:29:34,316 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash -677178540, now seen corresponding path program 7 times [2021-05-02 23:29:34,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:34,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019012362] [2021-05-02 23:29:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:34,328 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:34,329 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:34,467 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019012362] [2021-05-02 23:29:34,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019012362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:34,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:34,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:29:34,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876409054] [2021-05-02 23:29:34,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:29:34,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:29:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:29:34,469 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:34,802 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2021-05-02 23:29:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:29:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 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 [2021-05-02 23:29:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:34,804 INFO L225 Difference]: With dead ends: 121 [2021-05-02 23:29:34,804 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:29:34,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:29:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:29:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-05-02 23:29:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:29:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-05-02 23:29:34,814 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 28 [2021-05-02 23:29:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:34,814 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-05-02 23:29:34,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-05-02 23:29:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:29:34,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:34,816 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:34,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:29:34,816 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash 358434486, now seen corresponding path program 8 times [2021-05-02 23:29:34,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467253155] [2021-05-02 23:29:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:34,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:34,823 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:34,995 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:34,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467253155] [2021-05-02 23:29:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [467253155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:34,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:34,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:29:34,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237339777] [2021-05-02 23:29:34,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:29:34,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:29:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:29:34,997 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:35,376 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2021-05-02 23:29:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:29:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 [2021-05-02 23:29:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:35,378 INFO L225 Difference]: With dead ends: 133 [2021-05-02 23:29:35,378 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:29:35,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:29:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:29:35,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-05-02 23:29:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 23:29:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2021-05-02 23:29:35,390 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 30 [2021-05-02 23:29:35,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:35,390 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2021-05-02 23:29:35,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2021-05-02 23:29:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:29:35,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:35,391 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:35,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:29:35,392 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -849860200, now seen corresponding path program 9 times [2021-05-02 23:29:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:35,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93273564] [2021-05-02 23:29:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:35,398 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:35,399 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:35,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:35,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:35,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93273564] [2021-05-02 23:29:35,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [93273564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:35,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:35,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:29:35,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728641295] [2021-05-02 23:29:35,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:29:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:35,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:29:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:29:35,613 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2021-05-02 23:29:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:36,018 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2021-05-02 23:29:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:29:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2021-05-02 23:29:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:36,020 INFO L225 Difference]: With dead ends: 145 [2021-05-02 23:29:36,020 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:29:36,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:29:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:29:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-05-02 23:29:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:29:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-05-02 23:29:36,030 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 32 [2021-05-02 23:29:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:36,030 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-05-02 23:29:36,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2021-05-02 23:29:36,031 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-05-02 23:29:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:29:36,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:36,031 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:36,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:29:36,032 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1915083770, now seen corresponding path program 10 times [2021-05-02 23:29:36,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:36,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164976325] [2021-05-02 23:29:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:36,037 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:36,038 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:36,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:36,250 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:36,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164976325] [2021-05-02 23:29:36,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [164976325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:36,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:36,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:29:36,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097932692] [2021-05-02 23:29:36,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:29:36,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:29:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:29:36,253 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-05-02 23:29:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:36,757 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2021-05-02 23:29:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:29:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 [2021-05-02 23:29:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:36,759 INFO L225 Difference]: With dead ends: 157 [2021-05-02 23:29:36,759 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:29:36,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:29:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:29:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2021-05-02 23:29:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 23:29:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-05-02 23:29:36,768 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 34 [2021-05-02 23:29:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:36,768 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-05-02 23:29:36,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2021-05-02 23:29:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-05-02 23:29:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:29:36,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:36,769 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:36,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:29:36,769 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash 441482716, now seen corresponding path program 11 times [2021-05-02 23:29:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176611863] [2021-05-02 23:29:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:36,776 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:36,777 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:36,996 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:36,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176611863] [2021-05-02 23:29:36,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176611863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:36,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:36,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:29:36,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404526326] [2021-05-02 23:29:36,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:29:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:29:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:29:36,998 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:37,544 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2021-05-02 23:29:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:29:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 [2021-05-02 23:29:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:37,546 INFO L225 Difference]: With dead ends: 169 [2021-05-02 23:29:37,546 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 23:29:37,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:29:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 23:29:37,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2021-05-02 23:29:37,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 23:29:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-05-02 23:29:37,561 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 36 [2021-05-02 23:29:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:37,561 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-05-02 23:29:37,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-05-02 23:29:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:29:37,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:37,564 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:37,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:29:37,564 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1650077502, now seen corresponding path program 12 times [2021-05-02 23:29:37,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:37,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749816720] [2021-05-02 23:29:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:37,572 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:37,574 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:37,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:37,837 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:37,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749816720] [2021-05-02 23:29:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749816720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:37,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:37,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:29:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313114638] [2021-05-02 23:29:37,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:29:37,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:29:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:29:37,839 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-05-02 23:29:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:38,538 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2021-05-02 23:29:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:29:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 [2021-05-02 23:29:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:38,540 INFO L225 Difference]: With dead ends: 181 [2021-05-02 23:29:38,540 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 23:29:38,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:29:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 23:29:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2021-05-02 23:29:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 23:29:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2021-05-02 23:29:38,549 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 38 [2021-05-02 23:29:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:38,549 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2021-05-02 23:29:38,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-05-02 23:29:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2021-05-02 23:29:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:29:38,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:38,550 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:38,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:29:38,550 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -826470368, now seen corresponding path program 13 times [2021-05-02 23:29:38,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:38,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104346797] [2021-05-02 23:29:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:38,556 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:38,557 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:38,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:38,822 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104346797] [2021-05-02 23:29:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104346797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:38,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:38,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:29:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52341616] [2021-05-02 23:29:38,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:29:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:29:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:29:38,824 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2021-05-02 23:29:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:39,559 INFO L93 Difference]: Finished difference Result 193 states and 227 transitions. [2021-05-02 23:29:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:29:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 [2021-05-02 23:29:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:39,561 INFO L225 Difference]: With dead ends: 193 [2021-05-02 23:29:39,561 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:29:39,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:29:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:29:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2021-05-02 23:29:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 23:29:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2021-05-02 23:29:39,570 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 40 [2021-05-02 23:29:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:39,570 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2021-05-02 23:29:39,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2021-05-02 23:29:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2021-05-02 23:29:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:29:39,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:39,571 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:39,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:29:39,572 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1377091454, now seen corresponding path program 14 times [2021-05-02 23:29:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:39,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631098004] [2021-05-02 23:29:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:39,577 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:39,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:39,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:39,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:39,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631098004] [2021-05-02 23:29:39,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631098004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:39,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:39,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:29:39,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22644271] [2021-05-02 23:29:39,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:29:39,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:39,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:29:39,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:29:39,845 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:40,583 INFO L93 Difference]: Finished difference Result 205 states and 241 transitions. [2021-05-02 23:29:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:29:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 [2021-05-02 23:29:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:40,586 INFO L225 Difference]: With dead ends: 205 [2021-05-02 23:29:40,586 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:29:40,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:29:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:29:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2021-05-02 23:29:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:29:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-05-02 23:29:40,594 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 42 [2021-05-02 23:29:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:40,595 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-05-02 23:29:40,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-05-02 23:29:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:29:40,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:40,595 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:40,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:29:40,596 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2051989604, now seen corresponding path program 15 times [2021-05-02 23:29:40,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:40,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157059664] [2021-05-02 23:29:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:40,601 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:40,602 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:40,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157059664] [2021-05-02 23:29:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157059664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:40,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:40,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:29:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332095379] [2021-05-02 23:29:40,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:29:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:29:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:29:40,879 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-05-02 23:29:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:41,835 INFO L93 Difference]: Finished difference Result 217 states and 255 transitions. [2021-05-02 23:29:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:29:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 [2021-05-02 23:29:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:41,837 INFO L225 Difference]: With dead ends: 217 [2021-05-02 23:29:41,837 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 23:29:41,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:29:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 23:29:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2021-05-02 23:29:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:29:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2021-05-02 23:29:41,846 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 44 [2021-05-02 23:29:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:41,847 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2021-05-02 23:29:41,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-05-02 23:29:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2021-05-02 23:29:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:29:41,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:41,849 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:29:41,849 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1135996986, now seen corresponding path program 16 times [2021-05-02 23:29:41,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:41,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537681910] [2021-05-02 23:29:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:41,855 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:41,856 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:42,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:42,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537681910] [2021-05-02 23:29:42,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [537681910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:42,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:42,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:29:42,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219994868] [2021-05-02 23:29:42,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:29:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:29:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:29:42,188 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:43,140 INFO L93 Difference]: Finished difference Result 229 states and 269 transitions. [2021-05-02 23:29:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:29:43,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 [2021-05-02 23:29:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:43,144 INFO L225 Difference]: With dead ends: 229 [2021-05-02 23:29:43,144 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 23:29:43,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:29:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 23:29:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 132. [2021-05-02 23:29:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:29:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2021-05-02 23:29:43,152 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2021-05-02 23:29:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:43,152 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2021-05-02 23:29:43,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2021-05-02 23:29:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:29:43,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:43,153 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:43,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:29:43,153 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1815539368, now seen corresponding path program 17 times [2021-05-02 23:29:43,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:43,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949540053] [2021-05-02 23:29:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:43,159 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:43,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:43,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:43,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:43,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949540053] [2021-05-02 23:29:43,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [949540053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:43,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:43,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:29:43,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875003838] [2021-05-02 23:29:43,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:29:43,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:29:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:29:43,477 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:44,442 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2021-05-02 23:29:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:29:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 [2021-05-02 23:29:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:44,443 INFO L225 Difference]: With dead ends: 241 [2021-05-02 23:29:44,444 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:29:44,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:29:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:29:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-05-02 23:29:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:29:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2021-05-02 23:29:44,453 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 48 [2021-05-02 23:29:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:44,453 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2021-05-02 23:29:44,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2021-05-02 23:29:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:29:44,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:44,454 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:44,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:29:44,454 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash -731407094, now seen corresponding path program 18 times [2021-05-02 23:29:44,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:44,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160462487] [2021-05-02 23:29:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:44,463 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:44,464 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:44,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:44,799 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160462487] [2021-05-02 23:29:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160462487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:44,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:44,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:29:44,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760870465] [2021-05-02 23:29:44,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:29:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:29:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:29:44,801 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:46,042 INFO L93 Difference]: Finished difference Result 253 states and 297 transitions. [2021-05-02 23:29:46,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:29:46,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 [2021-05-02 23:29:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:46,046 INFO L225 Difference]: With dead ends: 253 [2021-05-02 23:29:46,046 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:29:46,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:29:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:29:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2021-05-02 23:29:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 23:29:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-05-02 23:29:46,059 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 50 [2021-05-02 23:29:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:46,061 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-05-02 23:29:46,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-05-02 23:29:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:29:46,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:46,062 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:46,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:29:46,062 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -215598356, now seen corresponding path program 19 times [2021-05-02 23:29:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:46,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150408383] [2021-05-02 23:29:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:46,070 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:46,072 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:46,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:46,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150408383] [2021-05-02 23:29:46,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1150408383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:46,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:46,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:29:46,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645506111] [2021-05-02 23:29:46,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:29:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:29:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:29:46,543 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:47,805 INFO L93 Difference]: Finished difference Result 265 states and 311 transitions. [2021-05-02 23:29:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:29:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-05-02 23:29:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:47,806 INFO L225 Difference]: With dead ends: 265 [2021-05-02 23:29:47,806 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:29:47,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:29:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:29:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2021-05-02 23:29:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 23:29:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2021-05-02 23:29:47,816 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 52 [2021-05-02 23:29:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:47,817 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2021-05-02 23:29:47,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2021-05-02 23:29:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:29:47,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:47,818 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:47,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:29:47,818 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1555359822, now seen corresponding path program 20 times [2021-05-02 23:29:47,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:47,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707139080] [2021-05-02 23:29:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:47,824 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:47,825 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:48,235 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:48,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707139080] [2021-05-02 23:29:48,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [707139080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:48,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:48,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:29:48,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316495416] [2021-05-02 23:29:48,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:29:48,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:29:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:29:48,236 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-05-02 23:29:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:49,494 INFO L93 Difference]: Finished difference Result 277 states and 325 transitions. [2021-05-02 23:29:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:29:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 [2021-05-02 23:29:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:49,498 INFO L225 Difference]: With dead ends: 277 [2021-05-02 23:29:49,498 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:29:49,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:29:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:29:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2021-05-02 23:29:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:29:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2021-05-02 23:29:49,512 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 54 [2021-05-02 23:29:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:49,512 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2021-05-02 23:29:49,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-05-02 23:29:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2021-05-02 23:29:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:29:49,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:49,513 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:49,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:29:49,514 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1655847632, now seen corresponding path program 21 times [2021-05-02 23:29:49,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:49,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921248614] [2021-05-02 23:29:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:49,521 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:49,522 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:49,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:50,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:50,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921248614] [2021-05-02 23:29:50,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [921248614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:50,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:50,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:29:50,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234595598] [2021-05-02 23:29:50,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:29:50,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:29:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:29:50,004 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:51,525 INFO L93 Difference]: Finished difference Result 289 states and 339 transitions. [2021-05-02 23:29:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:29:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 [2021-05-02 23:29:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:51,527 INFO L225 Difference]: With dead ends: 289 [2021-05-02 23:29:51,527 INFO L226 Difference]: Without dead ends: 178 [2021-05-02 23:29:51,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:29:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-02 23:29:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2021-05-02 23:29:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 23:29:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2021-05-02 23:29:51,544 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 56 [2021-05-02 23:29:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:51,544 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2021-05-02 23:29:51,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2021-05-02 23:29:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:29:51,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:51,545 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:51,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:29:51,545 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash 455274898, now seen corresponding path program 22 times [2021-05-02 23:29:51,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:51,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41191646] [2021-05-02 23:29:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:51,554 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:51,556 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:51,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:51,998 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:51,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41191646] [2021-05-02 23:29:51,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [41191646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:51,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:51,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:29:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327284046] [2021-05-02 23:29:51,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:29:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:29:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:29:52,000 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:53,457 INFO L93 Difference]: Finished difference Result 301 states and 353 transitions. [2021-05-02 23:29:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:29:53,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 [2021-05-02 23:29:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:53,459 INFO L225 Difference]: With dead ends: 301 [2021-05-02 23:29:53,459 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:29:53,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:29:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:29:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2021-05-02 23:29:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 23:29:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2021-05-02 23:29:53,468 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 58 [2021-05-02 23:29:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:53,468 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2021-05-02 23:29:53,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2021-05-02 23:29:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:29:53,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:53,469 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:53,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:29:53,470 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2019462516, now seen corresponding path program 23 times [2021-05-02 23:29:53,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:53,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114873835] [2021-05-02 23:29:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:53,478 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:53,480 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:53,967 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:53,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114873835] [2021-05-02 23:29:53,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114873835] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:53,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:53,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:29:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960980606] [2021-05-02 23:29:53,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:29:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:29:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:29:53,968 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:55,571 INFO L93 Difference]: Finished difference Result 313 states and 367 transitions. [2021-05-02 23:29:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:29:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 [2021-05-02 23:29:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:55,573 INFO L225 Difference]: With dead ends: 313 [2021-05-02 23:29:55,574 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 23:29:55,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:29:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 23:29:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 181. [2021-05-02 23:29:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 23:29:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 206 transitions. [2021-05-02 23:29:55,590 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 206 transitions. Word has length 60 [2021-05-02 23:29:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:55,590 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 206 transitions. [2021-05-02 23:29:55,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 206 transitions. [2021-05-02 23:29:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:29:55,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:55,592 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:55,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:29:55,592 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1965209814, now seen corresponding path program 24 times [2021-05-02 23:29:55,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:55,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703608464] [2021-05-02 23:29:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:55,599 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:55,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:56,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:56,142 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:56,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703608464] [2021-05-02 23:29:56,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [703608464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:56,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:56,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:29:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473882849] [2021-05-02 23:29:56,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:29:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:56,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:29:56,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:29:56,146 INFO L87 Difference]: Start difference. First operand 181 states and 206 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:57,935 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2021-05-02 23:29:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:29:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2021-05-02 23:29:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:57,937 INFO L225 Difference]: With dead ends: 325 [2021-05-02 23:29:57,937 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 23:29:57,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:29:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 23:29:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2021-05-02 23:29:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 23:29:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2021-05-02 23:29:57,946 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 62 [2021-05-02 23:29:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:57,947 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2021-05-02 23:29:57,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:29:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2021-05-02 23:29:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:29:57,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:57,947 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:57,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:29:57,948 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1367970744, now seen corresponding path program 25 times [2021-05-02 23:29:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:57,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039610704] [2021-05-02 23:29:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:57,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:29:57,956 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:58,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:58,503 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039610704] [2021-05-02 23:29:58,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039610704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:58,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:58,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:29:58,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360237525] [2021-05-02 23:29:58,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:29:58,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:29:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:29:58,504 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:00,453 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2021-05-02 23:30:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:30:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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 [2021-05-02 23:30:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:00,455 INFO L225 Difference]: With dead ends: 337 [2021-05-02 23:30:00,455 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 23:30:00,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:30:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 23:30:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 195. [2021-05-02 23:30:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 23:30:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2021-05-02 23:30:00,466 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 64 [2021-05-02 23:30:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:00,466 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2021-05-02 23:30:00,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2021-05-02 23:30:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:30:00,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:00,467 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:00,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:30:00,467 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1348125158, now seen corresponding path program 26 times [2021-05-02 23:30:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:00,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368275851] [2021-05-02 23:30:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:00,476 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:00,477 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:01,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:01,065 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:01,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368275851] [2021-05-02 23:30:01,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368275851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:01,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:01,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:30:01,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970965454] [2021-05-02 23:30:01,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:30:01,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:01,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:30:01,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:30:01,067 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:03,431 INFO L93 Difference]: Finished difference Result 349 states and 409 transitions. [2021-05-02 23:30:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:30:03,432 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 [2021-05-02 23:30:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:03,434 INFO L225 Difference]: With dead ends: 349 [2021-05-02 23:30:03,434 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 23:30:03,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:30:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 23:30:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 202. [2021-05-02 23:30:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:30:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2021-05-02 23:30:03,448 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 66 [2021-05-02 23:30:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:03,448 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2021-05-02 23:30:03,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2021-05-02 23:30:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:30:03,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:03,449 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:03,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:30:03,449 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -176171012, now seen corresponding path program 27 times [2021-05-02 23:30:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:03,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35973443] [2021-05-02 23:30:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:03,458 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:03,459 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:04,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:04,178 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:04,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35973443] [2021-05-02 23:30:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [35973443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:04,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:04,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:30:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296317064] [2021-05-02 23:30:04,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:30:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:30:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:30:04,179 INFO L87 Difference]: Start difference. First operand 202 states and 230 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:06,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:06,606 INFO L93 Difference]: Finished difference Result 361 states and 423 transitions. [2021-05-02 23:30:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:30:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 [2021-05-02 23:30:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:06,609 INFO L225 Difference]: With dead ends: 361 [2021-05-02 23:30:06,609 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 23:30:06,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:30:06,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 23:30:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2021-05-02 23:30:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 23:30:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2021-05-02 23:30:06,623 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 68 [2021-05-02 23:30:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:06,623 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2021-05-02 23:30:06,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2021-05-02 23:30:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:30:06,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:06,624 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:06,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:30:06,625 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:06,625 INFO L82 PathProgramCache]: Analyzing trace with hash 790331742, now seen corresponding path program 28 times [2021-05-02 23:30:06,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:06,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599800182] [2021-05-02 23:30:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:06,635 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:06,637 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:07,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:07,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599800182] [2021-05-02 23:30:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599800182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:07,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:07,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:30:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866626640] [2021-05-02 23:30:07,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:30:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:30:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:30:07,373 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:10,090 INFO L93 Difference]: Finished difference Result 373 states and 437 transitions. [2021-05-02 23:30:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:30:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 [2021-05-02 23:30:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:10,093 INFO L225 Difference]: With dead ends: 373 [2021-05-02 23:30:10,093 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 23:30:10,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:30:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 23:30:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2021-05-02 23:30:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 31 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:30:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 246 transitions. [2021-05-02 23:30:10,107 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 246 transitions. Word has length 70 [2021-05-02 23:30:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:10,108 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 246 transitions. [2021-05-02 23:30:10,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 246 transitions. [2021-05-02 23:30:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:30:10,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:10,108 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:10,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:30:10,109 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1886542400, now seen corresponding path program 29 times [2021-05-02 23:30:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:10,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928297409] [2021-05-02 23:30:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:10,116 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:10,118 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:10,866 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:10,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928297409] [2021-05-02 23:30:10,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [928297409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:10,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:10,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:30:10,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497409284] [2021-05-02 23:30:10,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:30:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:10,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:30:10,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:30:10,868 INFO L87 Difference]: Start difference. First operand 216 states and 246 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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) [2021-05-02 23:30:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:13,409 INFO L93 Difference]: Finished difference Result 385 states and 451 transitions. [2021-05-02 23:30:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:30:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 [2021-05-02 23:30:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:13,411 INFO L225 Difference]: With dead ends: 385 [2021-05-02 23:30:13,411 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 23:30:13,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:30:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 23:30:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2021-05-02 23:30:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 23:30:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2021-05-02 23:30:13,422 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 72 [2021-05-02 23:30:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:13,423 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2021-05-02 23:30:13,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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) [2021-05-02 23:30:13,423 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2021-05-02 23:30:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:30:13,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:13,424 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:13,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:30:13,424 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:13,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1216970078, now seen corresponding path program 30 times [2021-05-02 23:30:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:13,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337489061] [2021-05-02 23:30:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:13,430 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:13,431 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:14,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:14,106 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:14,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337489061] [2021-05-02 23:30:14,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [337489061] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:14,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:14,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:30:14,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62186859] [2021-05-02 23:30:14,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:30:14,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:14,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:30:14,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:30:14,108 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2021-05-02 23:30:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:16,681 INFO L93 Difference]: Finished difference Result 397 states and 465 transitions. [2021-05-02 23:30:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:30:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 [2021-05-02 23:30:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:16,683 INFO L225 Difference]: With dead ends: 397 [2021-05-02 23:30:16,683 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 23:30:16,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:30:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 23:30:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 230. [2021-05-02 23:30:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 23:30:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 262 transitions. [2021-05-02 23:30:16,694 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 262 transitions. Word has length 74 [2021-05-02 23:30:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:16,694 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 262 transitions. [2021-05-02 23:30:16,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2021-05-02 23:30:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 262 transitions. [2021-05-02 23:30:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:30:16,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:16,695 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:16,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:30:16,695 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1309809284, now seen corresponding path program 31 times [2021-05-02 23:30:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:16,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511529433] [2021-05-02 23:30:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:16,701 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:16,702 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:17,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:17,389 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511529433] [2021-05-02 23:30:17,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511529433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:17,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:17,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:30:17,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849230210] [2021-05-02 23:30:17,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:30:17,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:30:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:30:17,391 INFO L87 Difference]: Start difference. First operand 230 states and 262 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:20,345 INFO L93 Difference]: Finished difference Result 409 states and 479 transitions. [2021-05-02 23:30:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:30:20,345 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 [2021-05-02 23:30:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:20,347 INFO L225 Difference]: With dead ends: 409 [2021-05-02 23:30:20,347 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 23:30:20,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:30:20,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 23:30:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2021-05-02 23:30:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 23:30:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 270 transitions. [2021-05-02 23:30:20,361 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 270 transitions. Word has length 76 [2021-05-02 23:30:20,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:20,361 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 270 transitions. [2021-05-02 23:30:20,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 270 transitions. [2021-05-02 23:30:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:30:20,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:20,362 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:20,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:30:20,363 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1406713370, now seen corresponding path program 32 times [2021-05-02 23:30:20,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:20,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231475458] [2021-05-02 23:30:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:20,372 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:20,373 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:21,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:21,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:21,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231475458] [2021-05-02 23:30:21,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [231475458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:21,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:21,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:30:21,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033755997] [2021-05-02 23:30:21,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:30:21,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:30:21,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:30:21,192 INFO L87 Difference]: Start difference. First operand 237 states and 270 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:24,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:24,223 INFO L93 Difference]: Finished difference Result 421 states and 493 transitions. [2021-05-02 23:30:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:30:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 [2021-05-02 23:30:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:24,225 INFO L225 Difference]: With dead ends: 421 [2021-05-02 23:30:24,225 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 23:30:24,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:30:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 23:30:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2021-05-02 23:30:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 35 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 23:30:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2021-05-02 23:30:24,239 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 78 [2021-05-02 23:30:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:24,240 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2021-05-02 23:30:24,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2021-05-02 23:30:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:30:24,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:24,241 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:24,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:30:24,241 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -644867896, now seen corresponding path program 33 times [2021-05-02 23:30:24,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:24,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167720496] [2021-05-02 23:30:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:24,249 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:24,250 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:25,179 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167720496] [2021-05-02 23:30:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167720496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:30:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956931099] [2021-05-02 23:30:25,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:30:25,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:30:25,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:30:25,181 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:28,483 INFO L93 Difference]: Finished difference Result 433 states and 507 transitions. [2021-05-02 23:30:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:30:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 [2021-05-02 23:30:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:28,484 INFO L225 Difference]: With dead ends: 433 [2021-05-02 23:30:28,484 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 23:30:28,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:30:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 23:30:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-05-02 23:30:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:30:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 286 transitions. [2021-05-02 23:30:28,496 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 286 transitions. Word has length 80 [2021-05-02 23:30:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:28,497 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 286 transitions. [2021-05-02 23:30:28,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 286 transitions. [2021-05-02 23:30:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:30:28,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:28,498 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:28,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:30:28,498 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1344192298, now seen corresponding path program 34 times [2021-05-02 23:30:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:28,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721677667] [2021-05-02 23:30:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:28,504 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:28,505 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:29,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:29,435 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:29,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721677667] [2021-05-02 23:30:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [721677667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:29,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:29,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:30:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172320185] [2021-05-02 23:30:29,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:30:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:30:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:30:29,437 INFO L87 Difference]: Start difference. First operand 251 states and 286 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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) [2021-05-02 23:30:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:32,617 INFO L93 Difference]: Finished difference Result 445 states and 521 transitions. [2021-05-02 23:30:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:30:32,618 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 [2021-05-02 23:30:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:32,619 INFO L225 Difference]: With dead ends: 445 [2021-05-02 23:30:32,619 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 23:30:32,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 806.5ms TimeCoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:30:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 23:30:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 258. [2021-05-02 23:30:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 37 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 23:30:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 294 transitions. [2021-05-02 23:30:32,631 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 294 transitions. Word has length 82 [2021-05-02 23:30:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:32,631 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 294 transitions. [2021-05-02 23:30:32,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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) [2021-05-02 23:30:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 294 transitions. [2021-05-02 23:30:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:30:32,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:32,632 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:32,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:30:32,632 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1570592012, now seen corresponding path program 35 times [2021-05-02 23:30:32,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:32,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748342678] [2021-05-02 23:30:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:32,638 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:32,639 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:33,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:33,565 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:33,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748342678] [2021-05-02 23:30:33,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748342678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:33,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:33,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:30:33,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880142596] [2021-05-02 23:30:33,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:30:33,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:30:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:30:33,569 INFO L87 Difference]: Start difference. First operand 258 states and 294 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:36,955 INFO L93 Difference]: Finished difference Result 457 states and 535 transitions. [2021-05-02 23:30:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:30:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 [2021-05-02 23:30:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:36,957 INFO L225 Difference]: With dead ends: 457 [2021-05-02 23:30:36,957 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 23:30:36,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:30:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 23:30:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 265. [2021-05-02 23:30:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 23:30:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 302 transitions. [2021-05-02 23:30:36,968 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 302 transitions. Word has length 84 [2021-05-02 23:30:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:36,969 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 302 transitions. [2021-05-02 23:30:36,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:30:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 302 transitions. [2021-05-02 23:30:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:30:36,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:36,970 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:36,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:30:36,970 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash 97385070, now seen corresponding path program 36 times [2021-05-02 23:30:36,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:36,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788231414] [2021-05-02 23:30:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:36,976 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:36,977 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:37,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:37,846 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788231414] [2021-05-02 23:30:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [788231414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:37,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:37,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:30:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500009519] [2021-05-02 23:30:37,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:30:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:30:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:30:37,848 INFO L87 Difference]: Start difference. First operand 265 states and 302 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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) [2021-05-02 23:30:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:41,515 INFO L93 Difference]: Finished difference Result 469 states and 549 transitions. [2021-05-02 23:30:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:30:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 [2021-05-02 23:30:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:41,517 INFO L225 Difference]: With dead ends: 469 [2021-05-02 23:30:41,517 INFO L226 Difference]: Without dead ends: 283 [2021-05-02 23:30:41,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 752.0ms TimeCoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:30:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-02 23:30:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 272. [2021-05-02 23:30:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 39 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 23:30:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 310 transitions. [2021-05-02 23:30:41,532 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 310 transitions. Word has length 86 [2021-05-02 23:30:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:41,532 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 310 transitions. [2021-05-02 23:30:41,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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) [2021-05-02 23:30:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 310 transitions. [2021-05-02 23:30:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:30:41,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:41,533 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:41,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:30:41,533 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1684721488, now seen corresponding path program 37 times [2021-05-02 23:30:41,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:41,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143187015] [2021-05-02 23:30:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:41,540 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:41,541 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:42,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:42,654 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143187015] [2021-05-02 23:30:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143187015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:42,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:42,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:30:42,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191015952] [2021-05-02 23:30:42,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:30:42,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:42,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:30:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:30:42,656 INFO L87 Difference]: Start difference. First operand 272 states and 310 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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) [2021-05-02 23:30:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:46,436 INFO L93 Difference]: Finished difference Result 481 states and 563 transitions. [2021-05-02 23:30:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:30:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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 [2021-05-02 23:30:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:46,438 INFO L225 Difference]: With dead ends: 481 [2021-05-02 23:30:46,438 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 23:30:46,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:30:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 23:30:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2021-05-02 23:30:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 23:30:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2021-05-02 23:30:46,450 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 88 [2021-05-02 23:30:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:46,450 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2021-05-02 23:30:46,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 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) [2021-05-02 23:30:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2021-05-02 23:30:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:30:46,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:46,451 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:46,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:30:46,451 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1893338190, now seen corresponding path program 38 times [2021-05-02 23:30:46,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:46,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110267351] [2021-05-02 23:30:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:46,457 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:46,458 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:47,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:47,393 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:47,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110267351] [2021-05-02 23:30:47,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [110267351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:47,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:47,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:30:47,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547711086] [2021-05-02 23:30:47,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:30:47,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:47,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:30:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:30:47,395 INFO L87 Difference]: Start difference. First operand 279 states and 318 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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) [2021-05-02 23:30:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:51,424 INFO L93 Difference]: Finished difference Result 493 states and 577 transitions. [2021-05-02 23:30:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:30:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 [2021-05-02 23:30:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:51,426 INFO L225 Difference]: With dead ends: 493 [2021-05-02 23:30:51,426 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 23:30:51,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:30:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 23:30:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 286. [2021-05-02 23:30:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 41 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 23:30:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 326 transitions. [2021-05-02 23:30:51,438 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 326 transitions. Word has length 90 [2021-05-02 23:30:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:51,438 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 326 transitions. [2021-05-02 23:30:51,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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) [2021-05-02 23:30:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 326 transitions. [2021-05-02 23:30:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:30:51,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:51,439 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:51,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:30:51,439 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash -139884652, now seen corresponding path program 39 times [2021-05-02 23:30:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:51,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283571335] [2021-05-02 23:30:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:51,445 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:51,447 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:52,564 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:52,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283571335] [2021-05-02 23:30:52,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283571335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:52,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:52,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:30:52,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249004710] [2021-05-02 23:30:52,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:30:52,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:30:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:30:52,566 INFO L87 Difference]: Start difference. First operand 286 states and 326 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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) [2021-05-02 23:30:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:30:56,810 INFO L93 Difference]: Finished difference Result 505 states and 591 transitions. [2021-05-02 23:30:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:30:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 [2021-05-02 23:30:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:30:56,813 INFO L225 Difference]: With dead ends: 505 [2021-05-02 23:30:56,813 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 23:30:56,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 991.8ms TimeCoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:30:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 23:30:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2021-05-02 23:30:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 23:30:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 334 transitions. [2021-05-02 23:30:56,825 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 334 transitions. Word has length 92 [2021-05-02 23:30:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:30:56,825 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 334 transitions. [2021-05-02 23:30:56,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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) [2021-05-02 23:30:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 334 transitions. [2021-05-02 23:30:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:30:56,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:30:56,827 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:30:56,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:30:56,827 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:30:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:30:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1301785334, now seen corresponding path program 40 times [2021-05-02 23:30:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:30:56,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755207866] [2021-05-02 23:30:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:30:56,833 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:30:56,839 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:30:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:58,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:30:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:30:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:30:58,042 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:30:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755207866] [2021-05-02 23:30:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [755207866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:30:58,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:30:58,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:30:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021532752] [2021-05-02 23:30:58,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:30:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:30:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:30:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:30:58,044 INFO L87 Difference]: Start difference. First operand 293 states and 334 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 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) [2021-05-02 23:31:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:02,458 INFO L93 Difference]: Finished difference Result 517 states and 605 transitions. [2021-05-02 23:31:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:31:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 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 [2021-05-02 23:31:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:02,460 INFO L225 Difference]: With dead ends: 517 [2021-05-02 23:31:02,460 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 23:31:02,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1075.0ms TimeCoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:31:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 23:31:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 300. [2021-05-02 23:31:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 43 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-02 23:31:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 342 transitions. [2021-05-02 23:31:02,473 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 342 transitions. Word has length 94 [2021-05-02 23:31:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:02,473 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 342 transitions. [2021-05-02 23:31:02,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 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) [2021-05-02 23:31:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 342 transitions. [2021-05-02 23:31:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:31:02,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:02,474 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:02,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:31:02,474 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash -527794728, now seen corresponding path program 41 times [2021-05-02 23:31:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:02,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936483546] [2021-05-02 23:31:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:02,481 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:02,482 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:03,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:03,662 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936483546] [2021-05-02 23:31:03,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936483546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:03,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:03,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:31:03,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706888126] [2021-05-02 23:31:03,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:31:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:31:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:31:03,665 INFO L87 Difference]: Start difference. First operand 300 states and 342 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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) [2021-05-02 23:31:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:08,220 INFO L93 Difference]: Finished difference Result 529 states and 619 transitions. [2021-05-02 23:31:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:31:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 [2021-05-02 23:31:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:08,222 INFO L225 Difference]: With dead ends: 529 [2021-05-02 23:31:08,222 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 23:31:08,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:31:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 23:31:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 307. [2021-05-02 23:31:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-02 23:31:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 350 transitions. [2021-05-02 23:31:08,235 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 350 transitions. Word has length 96 [2021-05-02 23:31:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:08,235 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 350 transitions. [2021-05-02 23:31:08,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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) [2021-05-02 23:31:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 350 transitions. [2021-05-02 23:31:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:31:08,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:08,236 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:08,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:31:08,237 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2112610246, now seen corresponding path program 42 times [2021-05-02 23:31:08,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:08,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247413895] [2021-05-02 23:31:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:08,243 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:08,244 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:09,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:09,374 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:09,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247413895] [2021-05-02 23:31:09,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247413895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:09,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:09,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:31:09,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135928117] [2021-05-02 23:31:09,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:31:09,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:31:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:31:09,376 INFO L87 Difference]: Start difference. First operand 307 states and 350 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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) [2021-05-02 23:31:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:14,208 INFO L93 Difference]: Finished difference Result 541 states and 633 transitions. [2021-05-02 23:31:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:31:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 [2021-05-02 23:31:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:14,210 INFO L225 Difference]: With dead ends: 541 [2021-05-02 23:31:14,210 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 23:31:14,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1004.3ms TimeCoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:31:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 23:31:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 314. [2021-05-02 23:31:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 45 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 23:31:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 358 transitions. [2021-05-02 23:31:14,221 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 358 transitions. Word has length 98 [2021-05-02 23:31:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:14,221 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 358 transitions. [2021-05-02 23:31:14,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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) [2021-05-02 23:31:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 358 transitions. [2021-05-02 23:31:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:31:14,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:14,222 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:14,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:31:14,222 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash -406932964, now seen corresponding path program 43 times [2021-05-02 23:31:14,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:14,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252765847] [2021-05-02 23:31:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:14,228 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:14,229 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:15,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:15,480 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:15,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252765847] [2021-05-02 23:31:15,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252765847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:15,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:15,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:31:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065975058] [2021-05-02 23:31:15,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:31:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:31:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:31:15,482 INFO L87 Difference]: Start difference. First operand 314 states and 358 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 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) [2021-05-02 23:31:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:20,721 INFO L93 Difference]: Finished difference Result 553 states and 647 transitions. [2021-05-02 23:31:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:31:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 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 [2021-05-02 23:31:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:20,724 INFO L225 Difference]: With dead ends: 553 [2021-05-02 23:31:20,724 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 23:31:20,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1124.1ms TimeCoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:31:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 23:31:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 321. [2021-05-02 23:31:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 23:31:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 366 transitions. [2021-05-02 23:31:20,738 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 366 transitions. Word has length 100 [2021-05-02 23:31:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:20,738 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 366 transitions. [2021-05-02 23:31:20,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 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) [2021-05-02 23:31:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 366 transitions. [2021-05-02 23:31:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:31:20,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:20,739 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:31:20,740 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1928572034, now seen corresponding path program 44 times [2021-05-02 23:31:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262262419] [2021-05-02 23:31:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:20,753 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:20,754 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:22,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:22,182 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:22,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262262419] [2021-05-02 23:31:22,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [262262419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:22,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:22,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:31:22,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210598898] [2021-05-02 23:31:22,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:31:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:31:22,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:31:22,184 INFO L87 Difference]: Start difference. First operand 321 states and 366 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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) [2021-05-02 23:31:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:27,527 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2021-05-02 23:31:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:31:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 [2021-05-02 23:31:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:27,529 INFO L225 Difference]: With dead ends: 565 [2021-05-02 23:31:27,529 INFO L226 Difference]: Without dead ends: 339 [2021-05-02 23:31:27,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1262.5ms TimeCoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:31:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-02 23:31:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2021-05-02 23:31:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 47 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 23:31:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 374 transitions. [2021-05-02 23:31:27,541 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 374 transitions. Word has length 102 [2021-05-02 23:31:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:27,541 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 374 transitions. [2021-05-02 23:31:27,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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) [2021-05-02 23:31:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 374 transitions. [2021-05-02 23:31:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:31:27,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:27,542 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:27,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:31:27,542 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:27,543 INFO L82 PathProgramCache]: Analyzing trace with hash 360129632, now seen corresponding path program 45 times [2021-05-02 23:31:27,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:27,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009182148] [2021-05-02 23:31:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:27,548 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:27,550 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:28,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:28,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009182148] [2021-05-02 23:31:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009182148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:31:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467615099] [2021-05-02 23:31:28,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:31:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:31:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:31:28,918 INFO L87 Difference]: Start difference. First operand 328 states and 374 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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) [2021-05-02 23:31:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:34,412 INFO L93 Difference]: Finished difference Result 577 states and 675 transitions. [2021-05-02 23:31:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:31:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 [2021-05-02 23:31:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:34,414 INFO L225 Difference]: With dead ends: 577 [2021-05-02 23:31:34,414 INFO L226 Difference]: Without dead ends: 346 [2021-05-02 23:31:34,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1236.4ms TimeCoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:31:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-02 23:31:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 335. [2021-05-02 23:31:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 284 states have (on average 1.0105633802816902) internal successors, (287), 284 states have internal predecessors, (287), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 23:31:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 382 transitions. [2021-05-02 23:31:34,425 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 382 transitions. Word has length 104 [2021-05-02 23:31:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:34,426 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 382 transitions. [2021-05-02 23:31:34,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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) [2021-05-02 23:31:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 382 transitions. [2021-05-02 23:31:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:31:34,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:34,426 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:34,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:31:34,427 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 779175106, now seen corresponding path program 46 times [2021-05-02 23:31:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:34,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833570602] [2021-05-02 23:31:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:34,438 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:34,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:35,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:35,754 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833570602] [2021-05-02 23:31:35,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [833570602] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:35,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:35,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:31:35,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672260695] [2021-05-02 23:31:35,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:31:35,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:31:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:31:35,755 INFO L87 Difference]: Start difference. First operand 335 states and 382 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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) [2021-05-02 23:31:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:41,578 INFO L93 Difference]: Finished difference Result 589 states and 689 transitions. [2021-05-02 23:31:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:31:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 [2021-05-02 23:31:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:41,580 INFO L225 Difference]: With dead ends: 589 [2021-05-02 23:31:41,580 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 23:31:41,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1175.7ms TimeCoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:31:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 23:31:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2021-05-02 23:31:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 49 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 23:31:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 390 transitions. [2021-05-02 23:31:41,591 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 390 transitions. Word has length 106 [2021-05-02 23:31:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:41,592 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 390 transitions. [2021-05-02 23:31:41,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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) [2021-05-02 23:31:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 390 transitions. [2021-05-02 23:31:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:31:41,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:41,592 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:41,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:31:41,593 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash -245050204, now seen corresponding path program 47 times [2021-05-02 23:31:41,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:41,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336086155] [2021-05-02 23:31:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:41,599 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:41,600 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:43,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:43,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336086155] [2021-05-02 23:31:43,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336086155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:43,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:43,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:31:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407604441] [2021-05-02 23:31:43,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:31:43,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:31:43,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:31:43,081 INFO L87 Difference]: Start difference. First operand 342 states and 390 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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) [2021-05-02 23:31:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:49,207 INFO L93 Difference]: Finished difference Result 601 states and 703 transitions. [2021-05-02 23:31:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:31:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 [2021-05-02 23:31:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:49,209 INFO L225 Difference]: With dead ends: 601 [2021-05-02 23:31:49,210 INFO L226 Difference]: Without dead ends: 360 [2021-05-02 23:31:49,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1340.8ms TimeCoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:31:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-02 23:31:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 349. [2021-05-02 23:31:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 296 states have (on average 1.010135135135135) internal successors, (299), 296 states have internal predecessors, (299), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-05-02 23:31:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 398 transitions. [2021-05-02 23:31:49,223 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 398 transitions. Word has length 108 [2021-05-02 23:31:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:49,223 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 398 transitions. [2021-05-02 23:31:49,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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) [2021-05-02 23:31:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 398 transitions. [2021-05-02 23:31:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:31:49,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:49,224 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:49,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:31:49,224 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:49,224 INFO L82 PathProgramCache]: Analyzing trace with hash -978062330, now seen corresponding path program 48 times [2021-05-02 23:31:49,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:49,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784595532] [2021-05-02 23:31:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:49,229 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:49,230 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:50,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:50,727 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:50,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784595532] [2021-05-02 23:31:50,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [784595532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:50,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:50,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:31:50,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751948664] [2021-05-02 23:31:50,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:31:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:31:50,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:31:50,729 INFO L87 Difference]: Start difference. First operand 349 states and 398 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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) [2021-05-02 23:31:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:31:57,048 INFO L93 Difference]: Finished difference Result 613 states and 717 transitions. [2021-05-02 23:31:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:31:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 [2021-05-02 23:31:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:31:57,050 INFO L225 Difference]: With dead ends: 613 [2021-05-02 23:31:57,050 INFO L226 Difference]: Without dead ends: 367 [2021-05-02 23:31:57,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1364.1ms TimeCoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:31:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-02 23:31:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 356. [2021-05-02 23:31:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 51 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 23:31:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 406 transitions. [2021-05-02 23:31:57,062 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 406 transitions. Word has length 110 [2021-05-02 23:31:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:31:57,062 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 406 transitions. [2021-05-02 23:31:57,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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) [2021-05-02 23:31:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 406 transitions. [2021-05-02 23:31:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 23:31:57,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:31:57,063 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:31:57,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:31:57,063 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:31:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:31:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1028078872, now seen corresponding path program 49 times [2021-05-02 23:31:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:31:57,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748420330] [2021-05-02 23:31:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:31:57,068 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:31:57,069 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:31:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:31:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:31:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:31:58,696 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:31:58,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748420330] [2021-05-02 23:31:58,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [748420330] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:31:58,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:31:58,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:31:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388579820] [2021-05-02 23:31:58,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:31:58,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:31:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:31:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:31:58,697 INFO L87 Difference]: Start difference. First operand 356 states and 406 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 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) [2021-05-02 23:32:05,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:05,466 INFO L93 Difference]: Finished difference Result 625 states and 731 transitions. [2021-05-02 23:32:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:32:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 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 [2021-05-02 23:32:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:05,468 INFO L225 Difference]: With dead ends: 625 [2021-05-02 23:32:05,469 INFO L226 Difference]: Without dead ends: 374 [2021-05-02 23:32:05,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1452.3ms TimeCoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:32:05,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-02 23:32:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2021-05-02 23:32:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 308 states have (on average 1.0097402597402598) internal successors, (311), 308 states have internal predecessors, (311), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 23:32:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 414 transitions. [2021-05-02 23:32:05,480 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 414 transitions. Word has length 112 [2021-05-02 23:32:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:05,481 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 414 transitions. [2021-05-02 23:32:05,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 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) [2021-05-02 23:32:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 414 transitions. [2021-05-02 23:32:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:32:05,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:05,482 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:05,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:32:05,482 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1849335478, now seen corresponding path program 50 times [2021-05-02 23:32:05,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:05,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392270755] [2021-05-02 23:32:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:05,487 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:05,489 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:07,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:07,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392270755] [2021-05-02 23:32:07,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [392270755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:07,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:07,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:32:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877093477] [2021-05-02 23:32:07,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:32:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:32:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:32:07,091 INFO L87 Difference]: Start difference. First operand 363 states and 414 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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) [2021-05-02 23:32:14,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:14,139 INFO L93 Difference]: Finished difference Result 637 states and 745 transitions. [2021-05-02 23:32:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:32:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 [2021-05-02 23:32:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:14,142 INFO L225 Difference]: With dead ends: 637 [2021-05-02 23:32:14,142 INFO L226 Difference]: Without dead ends: 381 [2021-05-02 23:32:14,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:32:14,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-02 23:32:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 370. [2021-05-02 23:32:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 53 states have call successors, (53), 3 states have call predecessors, (53), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 23:32:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 422 transitions. [2021-05-02 23:32:14,154 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 422 transitions. Word has length 114 [2021-05-02 23:32:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:14,154 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 422 transitions. [2021-05-02 23:32:14,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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) [2021-05-02 23:32:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 422 transitions. [2021-05-02 23:32:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 23:32:14,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:14,155 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:14,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:32:14,155 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash -802951380, now seen corresponding path program 51 times [2021-05-02 23:32:14,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:14,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711121645] [2021-05-02 23:32:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:14,162 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:14,163 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:15,806 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:15,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711121645] [2021-05-02 23:32:15,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711121645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:15,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:15,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:32:15,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742684818] [2021-05-02 23:32:15,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:32:15,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:32:15,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:32:15,808 INFO L87 Difference]: Start difference. First operand 370 states and 422 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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) [2021-05-02 23:32:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:23,300 INFO L93 Difference]: Finished difference Result 649 states and 759 transitions. [2021-05-02 23:32:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:32:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 [2021-05-02 23:32:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:23,302 INFO L225 Difference]: With dead ends: 649 [2021-05-02 23:32:23,302 INFO L226 Difference]: Without dead ends: 388 [2021-05-02 23:32:23,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1472.7ms TimeCoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:32:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-02 23:32:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 377. [2021-05-02 23:32:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 320 states have (on average 1.009375) internal successors, (323), 320 states have internal predecessors, (323), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 23:32:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 430 transitions. [2021-05-02 23:32:23,314 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 430 transitions. Word has length 116 [2021-05-02 23:32:23,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:23,315 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 430 transitions. [2021-05-02 23:32:23,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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) [2021-05-02 23:32:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 430 transitions. [2021-05-02 23:32:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:32:23,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:23,316 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:23,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:32:23,316 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:23,316 INFO L82 PathProgramCache]: Analyzing trace with hash -250180466, now seen corresponding path program 52 times [2021-05-02 23:32:23,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:23,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025468333] [2021-05-02 23:32:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:23,322 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:23,323 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:25,011 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:25,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025468333] [2021-05-02 23:32:25,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025468333] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:25,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:25,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:32:25,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805165079] [2021-05-02 23:32:25,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:32:25,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:25,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:32:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:32:25,013 INFO L87 Difference]: Start difference. First operand 377 states and 430 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 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) [2021-05-02 23:32:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:32,658 INFO L93 Difference]: Finished difference Result 661 states and 773 transitions. [2021-05-02 23:32:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:32:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 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 [2021-05-02 23:32:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:32,661 INFO L225 Difference]: With dead ends: 661 [2021-05-02 23:32:32,661 INFO L226 Difference]: Without dead ends: 395 [2021-05-02 23:32:32,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:32:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-02 23:32:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 384. [2021-05-02 23:32:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 55 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 23:32:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 438 transitions. [2021-05-02 23:32:32,673 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 438 transitions. Word has length 118 [2021-05-02 23:32:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 438 transitions. [2021-05-02 23:32:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 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) [2021-05-02 23:32:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 438 transitions. [2021-05-02 23:32:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:32:32,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:32,674 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:32,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:32:32,674 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1613276816, now seen corresponding path program 53 times [2021-05-02 23:32:32,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:32,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831059874] [2021-05-02 23:32:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:32,680 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:32,681 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:34,427 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:34,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831059874] [2021-05-02 23:32:34,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831059874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:34,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:34,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:32:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230079288] [2021-05-02 23:32:34,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:32:34,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:32:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:32:34,428 INFO L87 Difference]: Start difference. First operand 384 states and 438 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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) [2021-05-02 23:32:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:42,416 INFO L93 Difference]: Finished difference Result 673 states and 787 transitions. [2021-05-02 23:32:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:32:42,417 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 [2021-05-02 23:32:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:42,419 INFO L225 Difference]: With dead ends: 673 [2021-05-02 23:32:42,419 INFO L226 Difference]: Without dead ends: 402 [2021-05-02 23:32:42,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:32:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-02 23:32:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2021-05-02 23:32:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 332 states have (on average 1.0090361445783131) internal successors, (335), 332 states have internal predecessors, (335), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 23:32:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 446 transitions. [2021-05-02 23:32:42,446 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 446 transitions. Word has length 120 [2021-05-02 23:32:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:42,446 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 446 transitions. [2021-05-02 23:32:42,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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) [2021-05-02 23:32:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 446 transitions. [2021-05-02 23:32:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:32:42,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:42,447 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:42,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:32:42,447 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1583843886, now seen corresponding path program 54 times [2021-05-02 23:32:42,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:42,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811462638] [2021-05-02 23:32:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:42,452 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:42,453 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:44,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:44,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811462638] [2021-05-02 23:32:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1811462638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:44,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:44,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:32:44,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478793381] [2021-05-02 23:32:44,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:32:44,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:44,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:32:44,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:32:44,213 INFO L87 Difference]: Start difference. First operand 391 states and 446 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 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) [2021-05-02 23:32:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:32:52,341 INFO L93 Difference]: Finished difference Result 685 states and 801 transitions. [2021-05-02 23:32:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:32:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 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 [2021-05-02 23:32:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:32:52,343 INFO L225 Difference]: With dead ends: 685 [2021-05-02 23:32:52,343 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 23:32:52,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1598.9ms TimeCoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:32:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 23:32:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 398. [2021-05-02 23:32:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 57 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 23:32:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 454 transitions. [2021-05-02 23:32:52,353 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 454 transitions. Word has length 122 [2021-05-02 23:32:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:32:52,354 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 454 transitions. [2021-05-02 23:32:52,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 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) [2021-05-02 23:32:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 454 transitions. [2021-05-02 23:32:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:32:52,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:32:52,355 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:32:52,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:32:52,355 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:32:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:32:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash 931398068, now seen corresponding path program 55 times [2021-05-02 23:32:52,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:32:52,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978956858] [2021-05-02 23:32:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:32:52,360 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:32:52,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:32:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:32:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:32:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:32:54,215 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:32:54,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978956858] [2021-05-02 23:32:54,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [978956858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:32:54,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:32:54,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:32:54,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832932649] [2021-05-02 23:32:54,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:32:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:32:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:32:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:32:54,217 INFO L87 Difference]: Start difference. First operand 398 states and 454 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 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) [2021-05-02 23:33:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:02,827 INFO L93 Difference]: Finished difference Result 697 states and 815 transitions. [2021-05-02 23:33:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:33:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 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 [2021-05-02 23:33:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:02,830 INFO L225 Difference]: With dead ends: 697 [2021-05-02 23:33:02,830 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 23:33:02,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1685.0ms TimeCoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:33:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 23:33:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 405. [2021-05-02 23:33:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 344 states have (on average 1.0087209302325582) internal successors, (347), 344 states have internal predecessors, (347), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 23:33:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 462 transitions. [2021-05-02 23:33:02,842 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 462 transitions. Word has length 124 [2021-05-02 23:33:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:02,842 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 462 transitions. [2021-05-02 23:33:02,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 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) [2021-05-02 23:33:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 462 transitions. [2021-05-02 23:33:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:33:02,843 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:02,843 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:02,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:33:02,843 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:02,844 INFO L82 PathProgramCache]: Analyzing trace with hash 12328214, now seen corresponding path program 56 times [2021-05-02 23:33:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671924356] [2021-05-02 23:33:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:02,849 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:33:02,850 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:04,829 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671924356] [2021-05-02 23:33:04,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671924356] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:04,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:04,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:33:04,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434832447] [2021-05-02 23:33:04,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:33:04,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:04,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:33:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:33:04,830 INFO L87 Difference]: Start difference. First operand 405 states and 462 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 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) [2021-05-02 23:33:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:14,241 INFO L93 Difference]: Finished difference Result 709 states and 829 transitions. [2021-05-02 23:33:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:33:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 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 [2021-05-02 23:33:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:14,244 INFO L225 Difference]: With dead ends: 709 [2021-05-02 23:33:14,244 INFO L226 Difference]: Without dead ends: 423 [2021-05-02 23:33:14,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1775.9ms TimeCoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:33:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-02 23:33:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2021-05-02 23:33:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 59 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 23:33:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 470 transitions. [2021-05-02 23:33:14,253 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 470 transitions. Word has length 126 [2021-05-02 23:33:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:14,253 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 470 transitions. [2021-05-02 23:33:14,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 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) [2021-05-02 23:33:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 470 transitions. [2021-05-02 23:33:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 23:33:14,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:14,254 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:14,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:33:14,254 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1549461496, now seen corresponding path program 57 times [2021-05-02 23:33:14,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:14,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115546759] [2021-05-02 23:33:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:14,264 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:33:14,265 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:16,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:16,319 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:16,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115546759] [2021-05-02 23:33:16,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115546759] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:16,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:16,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:33:16,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568425839] [2021-05-02 23:33:16,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:33:16,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:16,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:33:16,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:33:16,320 INFO L87 Difference]: Start difference. First operand 412 states and 470 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 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) [2021-05-02 23:33:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:26,364 INFO L93 Difference]: Finished difference Result 721 states and 843 transitions. [2021-05-02 23:33:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:33:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 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 [2021-05-02 23:33:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:26,367 INFO L225 Difference]: With dead ends: 721 [2021-05-02 23:33:26,367 INFO L226 Difference]: Without dead ends: 430 [2021-05-02 23:33:26,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1884.4ms TimeCoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:33:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-02 23:33:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 419. [2021-05-02 23:33:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 356 states have (on average 1.0084269662921348) internal successors, (359), 356 states have internal predecessors, (359), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 23:33:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 478 transitions. [2021-05-02 23:33:26,380 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 478 transitions. Word has length 128 [2021-05-02 23:33:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:26,380 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 478 transitions. [2021-05-02 23:33:26,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 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) [2021-05-02 23:33:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 478 transitions. [2021-05-02 23:33:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:33:26,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:26,381 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:26,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:33:26,381 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1265795674, now seen corresponding path program 58 times [2021-05-02 23:33:26,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:26,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812174722] [2021-05-02 23:33:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:26,388 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:33:26,389 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:28,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:28,777 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:28,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812174722] [2021-05-02 23:33:28,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [812174722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:28,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:28,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:33:28,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048503798] [2021-05-02 23:33:28,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:33:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:33:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:33:28,779 INFO L87 Difference]: Start difference. First operand 419 states and 478 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 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) [2021-05-02 23:33:38,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:38,742 INFO L93 Difference]: Finished difference Result 733 states and 857 transitions. [2021-05-02 23:33:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:33:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 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 [2021-05-02 23:33:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:38,745 INFO L225 Difference]: With dead ends: 733 [2021-05-02 23:33:38,745 INFO L226 Difference]: Without dead ends: 437 [2021-05-02 23:33:38,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2208.6ms TimeCoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:33:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-02 23:33:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 426. [2021-05-02 23:33:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 61 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 23:33:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 486 transitions. [2021-05-02 23:33:38,753 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 486 transitions. Word has length 130 [2021-05-02 23:33:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:38,753 INFO L480 AbstractCegarLoop]: Abstraction has 426 states and 486 transitions. [2021-05-02 23:33:38,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 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) [2021-05-02 23:33:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 486 transitions. [2021-05-02 23:33:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 23:33:38,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:38,754 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:38,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:33:38,754 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:38,754 INFO L82 PathProgramCache]: Analyzing trace with hash -754119620, now seen corresponding path program 59 times [2021-05-02 23:33:38,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:38,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883373454] [2021-05-02 23:33:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:38,768 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:33:38,769 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:40,914 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:40,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883373454] [2021-05-02 23:33:40,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883373454] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:40,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:40,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:33:40,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901381849] [2021-05-02 23:33:40,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:33:40,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:33:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:33:40,920 INFO L87 Difference]: Start difference. First operand 426 states and 486 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 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) [2021-05-02 23:33:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:33:51,043 INFO L93 Difference]: Finished difference Result 745 states and 871 transitions. [2021-05-02 23:33:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:33:51,043 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 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 [2021-05-02 23:33:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:33:51,045 INFO L225 Difference]: With dead ends: 745 [2021-05-02 23:33:51,045 INFO L226 Difference]: Without dead ends: 444 [2021-05-02 23:33:51,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1964.4ms TimeCoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:33:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-02 23:33:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 433. [2021-05-02 23:33:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 368 states have (on average 1.0081521739130435) internal successors, (371), 368 states have internal predecessors, (371), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 23:33:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 494 transitions. [2021-05-02 23:33:51,057 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 494 transitions. Word has length 132 [2021-05-02 23:33:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:33:51,057 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 494 transitions. [2021-05-02 23:33:51,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 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) [2021-05-02 23:33:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 494 transitions. [2021-05-02 23:33:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:33:51,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:33:51,058 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:33:51,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:33:51,058 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:33:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:33:51,058 INFO L82 PathProgramCache]: Analyzing trace with hash -567499362, now seen corresponding path program 60 times [2021-05-02 23:33:51,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:33:51,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362837179] [2021-05-02 23:33:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:33:51,063 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:33:51,064 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:33:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:33:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:33:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:33:53,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:33:53,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362837179] [2021-05-02 23:33:53,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [362837179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:33:53,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:33:53,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:33:53,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339982334] [2021-05-02 23:33:53,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:33:53,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:33:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:33:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:33:53,250 INFO L87 Difference]: Start difference. First operand 433 states and 494 transitions. Second operand has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 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) [2021-05-02 23:34:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:04,272 INFO L93 Difference]: Finished difference Result 757 states and 885 transitions. [2021-05-02 23:34:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:34:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 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 [2021-05-02 23:34:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:04,275 INFO L225 Difference]: With dead ends: 757 [2021-05-02 23:34:04,275 INFO L226 Difference]: Without dead ends: 451 [2021-05-02 23:34:04,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2018.6ms TimeCoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:34:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-02 23:34:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 440. [2021-05-02 23:34:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 63 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-02 23:34:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 502 transitions. [2021-05-02 23:34:04,289 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 502 transitions. Word has length 134 [2021-05-02 23:34:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:04,289 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 502 transitions. [2021-05-02 23:34:04,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.03125) internal successors, (130), 63 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) [2021-05-02 23:34:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 502 transitions. [2021-05-02 23:34:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 23:34:04,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:04,290 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:04,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:34:04,290 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1614057856, now seen corresponding path program 61 times [2021-05-02 23:34:04,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:04,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246808150] [2021-05-02 23:34:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:04,297 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:34:04,298 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:34:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:06,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:06,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246808150] [2021-05-02 23:34:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246808150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:06,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:06,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:34:06,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683510204] [2021-05-02 23:34:06,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:34:06,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:34:06,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:34:06,834 INFO L87 Difference]: Start difference. First operand 440 states and 502 transitions. Second operand has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 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) [2021-05-02 23:34:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:18,417 INFO L93 Difference]: Finished difference Result 769 states and 899 transitions. [2021-05-02 23:34:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:34:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 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 [2021-05-02 23:34:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:18,421 INFO L225 Difference]: With dead ends: 769 [2021-05-02 23:34:18,421 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 23:34:18,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2303.7ms TimeCoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:34:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 23:34:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 447. [2021-05-02 23:34:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 380 states have (on average 1.0078947368421052) internal successors, (383), 380 states have internal predecessors, (383), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 23:34:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 510 transitions. [2021-05-02 23:34:18,439 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 510 transitions. Word has length 136 [2021-05-02 23:34:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:18,439 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 510 transitions. [2021-05-02 23:34:18,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 64 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) [2021-05-02 23:34:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 510 transitions. [2021-05-02 23:34:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:34:18,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:18,448 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:18,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:34:18,448 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1960543970, now seen corresponding path program 62 times [2021-05-02 23:34:18,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:18,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102723776] [2021-05-02 23:34:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:18,456 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:34:18,465 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:34:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:21,090 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:21,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102723776] [2021-05-02 23:34:21,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102723776] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:21,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:21,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:34:21,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262937577] [2021-05-02 23:34:21,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:34:21,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:21,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:34:21,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:34:21,091 INFO L87 Difference]: Start difference. First operand 447 states and 510 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 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) [2021-05-02 23:34:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:32,519 INFO L93 Difference]: Finished difference Result 781 states and 913 transitions. [2021-05-02 23:34:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:34:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 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 [2021-05-02 23:34:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:32,522 INFO L225 Difference]: With dead ends: 781 [2021-05-02 23:34:32,522 INFO L226 Difference]: Without dead ends: 465 [2021-05-02 23:34:32,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2299.6ms TimeCoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:34:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-02 23:34:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 454. [2021-05-02 23:34:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 386 states have (on average 1.0077720207253886) internal successors, (389), 386 states have internal predecessors, (389), 65 states have call successors, (65), 3 states have call predecessors, (65), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2021-05-02 23:34:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 518 transitions. [2021-05-02 23:34:32,536 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 518 transitions. Word has length 138 [2021-05-02 23:34:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:32,537 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 518 transitions. [2021-05-02 23:34:32,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 65 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) [2021-05-02 23:34:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 518 transitions. [2021-05-02 23:34:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:34:32,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:32,538 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:32,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:34:32,538 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:32,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1179061956, now seen corresponding path program 63 times [2021-05-02 23:34:32,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:32,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80184315] [2021-05-02 23:34:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:32,543 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:34:32,544 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:34:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:35,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:35,414 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:35,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80184315] [2021-05-02 23:34:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [80184315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:35,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:35,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:34:35,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572763427] [2021-05-02 23:34:35,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:34:35,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:34:35,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:34:35,415 INFO L87 Difference]: Start difference. First operand 454 states and 518 transitions. Second operand has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 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) [2021-05-02 23:34:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:34:47,635 INFO L93 Difference]: Finished difference Result 793 states and 927 transitions. [2021-05-02 23:34:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:34:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 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 [2021-05-02 23:34:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:34:47,638 INFO L225 Difference]: With dead ends: 793 [2021-05-02 23:34:47,638 INFO L226 Difference]: Without dead ends: 472 [2021-05-02 23:34:47,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2647.8ms TimeCoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:34:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-02 23:34:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 461. [2021-05-02 23:34:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 392 states have (on average 1.0076530612244898) internal successors, (395), 392 states have internal predecessors, (395), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-02 23:34:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 526 transitions. [2021-05-02 23:34:47,651 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 526 transitions. Word has length 140 [2021-05-02 23:34:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:34:47,651 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 526 transitions. [2021-05-02 23:34:47,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.029850746268657) internal successors, (136), 66 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) [2021-05-02 23:34:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 526 transitions. [2021-05-02 23:34:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:34:47,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:34:47,652 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:34:47,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:34:47,653 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:34:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:34:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1794123302, now seen corresponding path program 64 times [2021-05-02 23:34:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:34:47,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598719478] [2021-05-02 23:34:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:34:47,658 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:34:47,659 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:34:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:50,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:34:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:34:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:34:50,502 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:34:50,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598719478] [2021-05-02 23:34:50,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [598719478] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:34:50,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:34:50,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:34:50,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823108613] [2021-05-02 23:34:50,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:34:50,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:34:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:34:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:34:50,503 INFO L87 Difference]: Start difference. First operand 461 states and 526 transitions. Second operand has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 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) [2021-05-02 23:35:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:03,660 INFO L93 Difference]: Finished difference Result 805 states and 941 transitions. [2021-05-02 23:35:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:35:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 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 [2021-05-02 23:35:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:03,663 INFO L225 Difference]: With dead ends: 805 [2021-05-02 23:35:03,663 INFO L226 Difference]: Without dead ends: 479 [2021-05-02 23:35:03,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2625.5ms TimeCoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:35:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-02 23:35:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 468. [2021-05-02 23:35:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 398 states have (on average 1.0075376884422111) internal successors, (401), 398 states have internal predecessors, (401), 67 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 23:35:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 534 transitions. [2021-05-02 23:35:03,677 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 534 transitions. Word has length 142 [2021-05-02 23:35:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:03,677 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 534 transitions. [2021-05-02 23:35:03,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 67 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) [2021-05-02 23:35:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 534 transitions. [2021-05-02 23:35:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 23:35:03,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:03,678 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:03,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:35:03,678 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 162589960, now seen corresponding path program 65 times [2021-05-02 23:35:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:03,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208896037] [2021-05-02 23:35:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:03,687 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:35:03,688 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:35:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:06,358 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:06,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208896037] [2021-05-02 23:35:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [208896037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:06,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:06,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:35:06,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988295814] [2021-05-02 23:35:06,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:35:06,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:06,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:35:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:35:06,360 INFO L87 Difference]: Start difference. First operand 468 states and 534 transitions. Second operand has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 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) [2021-05-02 23:35:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:21,272 INFO L93 Difference]: Finished difference Result 817 states and 955 transitions. [2021-05-02 23:35:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:35:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 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 [2021-05-02 23:35:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:21,276 INFO L225 Difference]: With dead ends: 817 [2021-05-02 23:35:21,276 INFO L226 Difference]: Without dead ends: 486 [2021-05-02 23:35:21,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2454.0ms TimeCoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:35:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-02 23:35:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 475. [2021-05-02 23:35:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 404 states have (on average 1.0074257425742574) internal successors, (407), 404 states have internal predecessors, (407), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 23:35:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 542 transitions. [2021-05-02 23:35:21,290 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 542 transitions. Word has length 144 [2021-05-02 23:35:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 542 transitions. [2021-05-02 23:35:21,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.028985507246377) internal successors, (140), 68 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) [2021-05-02 23:35:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 542 transitions. [2021-05-02 23:35:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:35:21,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:21,292 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:21,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:35:21,292 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash -77888662, now seen corresponding path program 66 times [2021-05-02 23:35:21,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:21,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914522049] [2021-05-02 23:35:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:21,306 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:35:21,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:35:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:24,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:24,144 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:24,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914522049] [2021-05-02 23:35:24,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914522049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:24,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:24,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:35:24,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966546923] [2021-05-02 23:35:24,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:35:24,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:35:24,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:35:24,146 INFO L87 Difference]: Start difference. First operand 475 states and 542 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 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) [2021-05-02 23:35:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:39,380 INFO L93 Difference]: Finished difference Result 829 states and 969 transitions. [2021-05-02 23:35:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:35:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 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 [2021-05-02 23:35:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:39,383 INFO L225 Difference]: With dead ends: 829 [2021-05-02 23:35:39,383 INFO L226 Difference]: Without dead ends: 493 [2021-05-02 23:35:39,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2594.2ms TimeCoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:35:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-02 23:35:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 482. [2021-05-02 23:35:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 410 states have (on average 1.0073170731707317) internal successors, (413), 410 states have internal predecessors, (413), 69 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 23:35:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 550 transitions. [2021-05-02 23:35:39,396 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 550 transitions. Word has length 146 [2021-05-02 23:35:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:39,396 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 550 transitions. [2021-05-02 23:35:39,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 69 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) [2021-05-02 23:35:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 550 transitions. [2021-05-02 23:35:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:35:39,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:39,397 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:39,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:35:39,398 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash 750389580, now seen corresponding path program 67 times [2021-05-02 23:35:39,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:39,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856216300] [2021-05-02 23:35:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:39,404 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:35:39,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:35:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:42,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:35:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:35:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:35:42,978 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:35:42,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856216300] [2021-05-02 23:35:42,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [856216300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:35:42,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:35:42,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:35:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086756748] [2021-05-02 23:35:42,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:35:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:35:42,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:35:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:35:42,980 INFO L87 Difference]: Start difference. First operand 482 states and 550 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 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) [2021-05-02 23:35:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:35:57,744 INFO L93 Difference]: Finished difference Result 841 states and 983 transitions. [2021-05-02 23:35:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:35:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 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 [2021-05-02 23:35:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:35:57,747 INFO L225 Difference]: With dead ends: 841 [2021-05-02 23:35:57,747 INFO L226 Difference]: Without dead ends: 500 [2021-05-02 23:35:57,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3311.5ms TimeCoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:35:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-05-02 23:35:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 489. [2021-05-02 23:35:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 416 states have (on average 1.0072115384615385) internal successors, (419), 416 states have internal predecessors, (419), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 23:35:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 558 transitions. [2021-05-02 23:35:57,764 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 558 transitions. Word has length 148 [2021-05-02 23:35:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:35:57,764 INFO L480 AbstractCegarLoop]: Abstraction has 489 states and 558 transitions. [2021-05-02 23:35:57,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 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) [2021-05-02 23:35:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 558 transitions. [2021-05-02 23:35:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:35:57,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:35:57,765 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:35:57,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:35:57,765 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:35:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:35:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2138136914, now seen corresponding path program 68 times [2021-05-02 23:35:57,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:35:57,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561216722] [2021-05-02 23:35:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:35:57,772 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:35:57,774 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:35:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:01,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:01,459 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:01,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561216722] [2021-05-02 23:36:01,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [561216722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:01,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:01,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:36:01,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558597922] [2021-05-02 23:36:01,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:36:01,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:36:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:36:01,461 INFO L87 Difference]: Start difference. First operand 489 states and 558 transitions. Second operand has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 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) [2021-05-02 23:36:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:17,742 INFO L93 Difference]: Finished difference Result 853 states and 997 transitions. [2021-05-02 23:36:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:36:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 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 [2021-05-02 23:36:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:17,746 INFO L225 Difference]: With dead ends: 853 [2021-05-02 23:36:17,746 INFO L226 Difference]: Without dead ends: 507 [2021-05-02 23:36:17,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3454.9ms TimeCoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:36:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-02 23:36:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2021-05-02 23:36:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 422 states have internal predecessors, (425), 71 states have call successors, (71), 3 states have call predecessors, (71), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 23:36:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 566 transitions. [2021-05-02 23:36:17,760 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 566 transitions. Word has length 150 [2021-05-02 23:36:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:17,760 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 566 transitions. [2021-05-02 23:36:17,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 71 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) [2021-05-02 23:36:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 566 transitions. [2021-05-02 23:36:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 23:36:17,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:17,761 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:17,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:36:17,761 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash 831742864, now seen corresponding path program 69 times [2021-05-02 23:36:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:17,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863402298] [2021-05-02 23:36:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:17,767 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:36:17,769 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:36:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:22,397 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:22,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863402298] [2021-05-02 23:36:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863402298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:22,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:36:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984814369] [2021-05-02 23:36:22,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:36:22,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:22,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:36:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:36:22,399 INFO L87 Difference]: Start difference. First operand 496 states and 566 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 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) [2021-05-02 23:36:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:36:41,302 INFO L93 Difference]: Finished difference Result 865 states and 1011 transitions. [2021-05-02 23:36:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:36:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 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 [2021-05-02 23:36:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:36:41,308 INFO L225 Difference]: With dead ends: 865 [2021-05-02 23:36:41,308 INFO L226 Difference]: Without dead ends: 514 [2021-05-02 23:36:41,310 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4352.3ms TimeCoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:36:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-02 23:36:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 503. [2021-05-02 23:36:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 23:36:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 574 transitions. [2021-05-02 23:36:41,334 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 574 transitions. Word has length 152 [2021-05-02 23:36:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:36:41,334 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 574 transitions. [2021-05-02 23:36:41,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 72 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) [2021-05-02 23:36:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 574 transitions. [2021-05-02 23:36:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:36:41,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:36:41,336 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:36:41,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:36:41,336 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:36:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:36:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1267042318, now seen corresponding path program 70 times [2021-05-02 23:36:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:36:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139648485] [2021-05-02 23:36:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:36:41,346 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:36:41,348 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:36:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:46,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:36:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:36:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:36:46,931 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:36:46,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139648485] [2021-05-02 23:36:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139648485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:36:46,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:36:46,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:36:46,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272794907] [2021-05-02 23:36:46,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:36:46,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:36:46,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:36:46,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:36:46,933 INFO L87 Difference]: Start difference. First operand 503 states and 574 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 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) [2021-05-02 23:37:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:10,313 INFO L93 Difference]: Finished difference Result 877 states and 1025 transitions. [2021-05-02 23:37:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:37:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 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 [2021-05-02 23:37:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:10,316 INFO L225 Difference]: With dead ends: 877 [2021-05-02 23:37:10,317 INFO L226 Difference]: Without dead ends: 521 [2021-05-02 23:37:10,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5244.5ms TimeCoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:37:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-02 23:37:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 510. [2021-05-02 23:37:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 434 states have (on average 1.0069124423963134) internal successors, (437), 434 states have internal predecessors, (437), 73 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 23:37:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 582 transitions. [2021-05-02 23:37:10,334 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 582 transitions. Word has length 154 [2021-05-02 23:37:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:10,335 INFO L480 AbstractCegarLoop]: Abstraction has 510 states and 582 transitions. [2021-05-02 23:37:10,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 73 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) [2021-05-02 23:37:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 582 transitions. [2021-05-02 23:37:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:37:10,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:10,336 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:10,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:37:10,336 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash 435026900, now seen corresponding path program 71 times [2021-05-02 23:37:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:10,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181982760] [2021-05-02 23:37:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:10,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:37:10,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:37:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:15,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181982760] [2021-05-02 23:37:15,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [181982760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:15,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:15,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:37:15,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326963212] [2021-05-02 23:37:15,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:37:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:37:15,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:37:15,273 INFO L87 Difference]: Start difference. First operand 510 states and 582 transitions. Second operand has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 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) [2021-05-02 23:37:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:37:37,874 INFO L93 Difference]: Finished difference Result 889 states and 1039 transitions. [2021-05-02 23:37:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:37:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 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 [2021-05-02 23:37:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:37:37,878 INFO L225 Difference]: With dead ends: 889 [2021-05-02 23:37:37,879 INFO L226 Difference]: Without dead ends: 528 [2021-05-02 23:37:37,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4578.2ms TimeCoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:37:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-02 23:37:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 517. [2021-05-02 23:37:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 440 states have (on average 1.0068181818181818) internal successors, (443), 440 states have internal predecessors, (443), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 23:37:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 590 transitions. [2021-05-02 23:37:37,911 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 590 transitions. Word has length 156 [2021-05-02 23:37:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:37:37,912 INFO L480 AbstractCegarLoop]: Abstraction has 517 states and 590 transitions. [2021-05-02 23:37:37,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.026666666666667) internal successors, (152), 74 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) [2021-05-02 23:37:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 590 transitions. [2021-05-02 23:37:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:37:37,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:37:37,913 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:37:37,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:37:37,914 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:37:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:37:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -258994378, now seen corresponding path program 72 times [2021-05-02 23:37:37,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:37:37,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163936576] [2021-05-02 23:37:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:37:37,921 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:37:37,922 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:37:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:41,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:37:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:37:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:37:41,582 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:37:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163936576] [2021-05-02 23:37:41,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1163936576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:37:41,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:37:41,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:37:41,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683855674] [2021-05-02 23:37:41,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:37:41,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:37:41,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:37:41,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:37:41,584 INFO L87 Difference]: Start difference. First operand 517 states and 590 transitions. Second operand has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 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) [2021-05-02 23:38:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:04,378 INFO L93 Difference]: Finished difference Result 901 states and 1053 transitions. [2021-05-02 23:38:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:38:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 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 [2021-05-02 23:38:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:04,383 INFO L225 Difference]: With dead ends: 901 [2021-05-02 23:38:04,383 INFO L226 Difference]: Without dead ends: 535 [2021-05-02 23:38:04,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3375.2ms TimeCoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:38:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-02 23:38:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 524. [2021-05-02 23:38:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 75 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 23:38:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 598 transitions. [2021-05-02 23:38:04,401 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 598 transitions. Word has length 158 [2021-05-02 23:38:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:04,401 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 598 transitions. [2021-05-02 23:38:04,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.026315789473684) internal successors, (154), 75 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) [2021-05-02 23:38:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 598 transitions. [2021-05-02 23:38:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:38:04,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:04,402 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:04,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:38:04,402 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1493511656, now seen corresponding path program 73 times [2021-05-02 23:38:04,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:04,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617102945] [2021-05-02 23:38:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:04,419 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:38:04,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:38:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:09,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:09,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617102945] [2021-05-02 23:38:09,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617102945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:09,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:09,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:38:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619717542] [2021-05-02 23:38:09,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:38:09,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:09,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:38:09,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:38:09,540 INFO L87 Difference]: Start difference. First operand 524 states and 598 transitions. Second operand has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 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) [2021-05-02 23:38:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:33,751 INFO L93 Difference]: Finished difference Result 913 states and 1067 transitions. [2021-05-02 23:38:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:38:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 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 [2021-05-02 23:38:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:33,755 INFO L225 Difference]: With dead ends: 913 [2021-05-02 23:38:33,756 INFO L226 Difference]: Without dead ends: 542 [2021-05-02 23:38:33,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4775.8ms TimeCoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:38:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-02 23:38:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 531. [2021-05-02 23:38:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 452 states have (on average 1.0066371681415929) internal successors, (455), 452 states have internal predecessors, (455), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2021-05-02 23:38:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 606 transitions. [2021-05-02 23:38:33,772 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 606 transitions. Word has length 160 [2021-05-02 23:38:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:33,772 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 606 transitions. [2021-05-02 23:38:33,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 76 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) [2021-05-02 23:38:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 606 transitions. [2021-05-02 23:38:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:38:33,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:33,773 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:33,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:38:33,773 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1841325178, now seen corresponding path program 74 times [2021-05-02 23:38:33,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:33,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656680504] [2021-05-02 23:38:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:33,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:38:33,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:38:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:37,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:38:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:38:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:38:37,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:38:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656680504] [2021-05-02 23:38:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656680504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:38:37,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:38:37,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:38:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979528855] [2021-05-02 23:38:37,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:38:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:38:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:38:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:38:37,890 INFO L87 Difference]: Start difference. First operand 531 states and 606 transitions. Second operand has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 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) [2021-05-02 23:38:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:38:57,684 INFO L93 Difference]: Finished difference Result 925 states and 1081 transitions. [2021-05-02 23:38:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:38:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 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 [2021-05-02 23:38:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:38:57,688 INFO L225 Difference]: With dead ends: 925 [2021-05-02 23:38:57,688 INFO L226 Difference]: Without dead ends: 549 [2021-05-02 23:38:57,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3824.2ms TimeCoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:38:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-02 23:38:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 538. [2021-05-02 23:38:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 458 states have (on average 1.0065502183406114) internal successors, (461), 458 states have internal predecessors, (461), 77 states have call successors, (77), 3 states have call predecessors, (77), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2021-05-02 23:38:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 614 transitions. [2021-05-02 23:38:57,704 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 614 transitions. Word has length 162 [2021-05-02 23:38:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:38:57,704 INFO L480 AbstractCegarLoop]: Abstraction has 538 states and 614 transitions. [2021-05-02 23:38:57,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 77 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) [2021-05-02 23:38:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 614 transitions. [2021-05-02 23:38:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 23:38:57,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:38:57,705 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:38:57,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:38:57,706 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:38:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:38:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1721047460, now seen corresponding path program 75 times [2021-05-02 23:38:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:38:57,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905257075] [2021-05-02 23:38:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:38:57,714 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:38:57,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:38:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:01,927 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:01,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905257075] [2021-05-02 23:39:01,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905257075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:01,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:01,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:39:01,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715960500] [2021-05-02 23:39:01,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:39:01,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:39:01,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:39:01,928 INFO L87 Difference]: Start difference. First operand 538 states and 614 transitions. Second operand has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 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) [2021-05-02 23:39:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:28,242 INFO L93 Difference]: Finished difference Result 937 states and 1095 transitions. [2021-05-02 23:39:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:39:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 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 [2021-05-02 23:39:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:28,246 INFO L225 Difference]: With dead ends: 937 [2021-05-02 23:39:28,246 INFO L226 Difference]: Without dead ends: 556 [2021-05-02 23:39:28,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3878.9ms TimeCoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:39:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-02 23:39:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 545. [2021-05-02 23:39:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 464 states have (on average 1.0064655172413792) internal successors, (467), 464 states have internal predecessors, (467), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 23:39:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 622 transitions. [2021-05-02 23:39:28,266 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 622 transitions. Word has length 164 [2021-05-02 23:39:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:28,266 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 622 transitions. [2021-05-02 23:39:28,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0253164556962027) internal successors, (160), 78 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) [2021-05-02 23:39:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 622 transitions. [2021-05-02 23:39:28,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:39:28,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:28,267 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:28,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:39:28,268 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:28,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2072217666, now seen corresponding path program 76 times [2021-05-02 23:39:28,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:28,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370102462] [2021-05-02 23:39:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:28,275 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:39:28,277 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:32,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:32,782 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370102462] [2021-05-02 23:39:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370102462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:32,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:32,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:39:32,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316156508] [2021-05-02 23:39:32,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:39:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:32,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:39:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:39:32,785 INFO L87 Difference]: Start difference. First operand 545 states and 622 transitions. Second operand has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 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) [2021-05-02 23:39:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:55,775 INFO L93 Difference]: Finished difference Result 949 states and 1109 transitions. [2021-05-02 23:39:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:39:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 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 [2021-05-02 23:39:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:55,779 INFO L225 Difference]: With dead ends: 949 [2021-05-02 23:39:55,779 INFO L226 Difference]: Without dead ends: 563 [2021-05-02 23:39:55,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4155.1ms TimeCoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:39:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-02 23:39:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 552. [2021-05-02 23:39:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 470 states have (on average 1.0063829787234042) internal successors, (473), 470 states have internal predecessors, (473), 79 states have call successors, (79), 3 states have call predecessors, (79), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 23:39:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 630 transitions. [2021-05-02 23:39:55,794 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 630 transitions. Word has length 166 [2021-05-02 23:39:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:55,794 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 630 transitions. [2021-05-02 23:39:55,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.025) internal successors, (162), 79 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) [2021-05-02 23:39:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 630 transitions. [2021-05-02 23:39:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 23:39:55,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:55,795 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:55,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:39:55,795 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -244369248, now seen corresponding path program 77 times [2021-05-02 23:39:55,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:55,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684089722] [2021-05-02 23:39:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:55,802 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:39:55,804 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:01,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:01,630 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:01,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684089722] [2021-05-02 23:40:01,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [684089722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:01,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:01,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:40:01,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021883784] [2021-05-02 23:40:01,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:40:01,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:40:01,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:40:01,632 INFO L87 Difference]: Start difference. First operand 552 states and 630 transitions. Second operand has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 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) [2021-05-02 23:40:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:27,852 INFO L93 Difference]: Finished difference Result 961 states and 1123 transitions. [2021-05-02 23:40:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:40:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 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 [2021-05-02 23:40:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:27,860 INFO L225 Difference]: With dead ends: 961 [2021-05-02 23:40:27,860 INFO L226 Difference]: Without dead ends: 570 [2021-05-02 23:40:27,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5499.0ms TimeCoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:40:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-02 23:40:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 559. [2021-05-02 23:40:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 476 states have (on average 1.0063025210084033) internal successors, (479), 476 states have internal predecessors, (479), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 23:40:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 638 transitions. [2021-05-02 23:40:27,888 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 638 transitions. Word has length 168 [2021-05-02 23:40:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:27,888 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 638 transitions. [2021-05-02 23:40:27,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 80 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) [2021-05-02 23:40:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 638 transitions. [2021-05-02 23:40:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:40:27,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:27,890 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:27,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:40:27,890 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash -323663614, now seen corresponding path program 78 times [2021-05-02 23:40:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:27,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369391036] [2021-05-02 23:40:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:27,903 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:40:27,905 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:40:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:36,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:36,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369391036] [2021-05-02 23:40:36,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [369391036] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:36,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:36,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:40:36,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981893451] [2021-05-02 23:40:36,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:40:36,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:40:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:40:36,020 INFO L87 Difference]: Start difference. First operand 559 states and 638 transitions. Second operand has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 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) [2021-05-02 23:41:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:11,053 INFO L93 Difference]: Finished difference Result 973 states and 1137 transitions. [2021-05-02 23:41:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:41:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 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 [2021-05-02 23:41:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:11,058 INFO L225 Difference]: With dead ends: 973 [2021-05-02 23:41:11,058 INFO L226 Difference]: Without dead ends: 577 [2021-05-02 23:41:11,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7640.7ms TimeCoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:41:11,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-02 23:41:11,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 566. [2021-05-02 23:41:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 482 states have (on average 1.0062240663900415) internal successors, (485), 482 states have internal predecessors, (485), 81 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-05-02 23:41:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 646 transitions. [2021-05-02 23:41:11,079 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 646 transitions. Word has length 170 [2021-05-02 23:41:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:11,080 INFO L480 AbstractCegarLoop]: Abstraction has 566 states and 646 transitions. [2021-05-02 23:41:11,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.024390243902439) internal successors, (166), 81 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) [2021-05-02 23:41:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 646 transitions. [2021-05-02 23:41:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 23:41:11,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:11,082 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:11,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:41:11,082 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 783861988, now seen corresponding path program 79 times [2021-05-02 23:41:11,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:11,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529114564] [2021-05-02 23:41:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:11,095 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:41:11,096 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:41:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:19,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:19,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:19,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529114564] [2021-05-02 23:41:19,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [529114564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:19,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:19,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:41:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232676737] [2021-05-02 23:41:19,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:41:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:41:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:41:19,206 INFO L87 Difference]: Start difference. First operand 566 states and 646 transitions. Second operand has 83 states, 83 states have (on average 2.0240963855421685) internal successors, (168), 82 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)