/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:40,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:40,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:40,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:40,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:40,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:40,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:40,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:01:40,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:40,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:40,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:40,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:40,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:40,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:40,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:40,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:40,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:40,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:40,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:40,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:40,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:40,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:40,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:40,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:40,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:40,125 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:40,125 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:40,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:40,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:40,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:40,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:40,407 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:40,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 23:01:40,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1dbe8066/c77b904b08084d6ca9ae6ac6826d45f8/FLAG63819533b [2021-05-02 23:01:40,814 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:40,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 23:01:40,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1dbe8066/c77b904b08084d6ca9ae6ac6826d45f8/FLAG63819533b [2021-05-02 23:01:40,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1dbe8066/c77b904b08084d6ca9ae6ac6826d45f8 [2021-05-02 23:01:40,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:40,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:40,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:40,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:40,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:40,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:40" (1/1) ... [2021-05-02 23:01:40,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a54981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:40, skipping insertion in model container [2021-05-02 23:01:40,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:40" (1/1) ... [2021-05-02 23:01:40,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:40,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:40,983 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2021-05-02 23:01:41,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:41,005 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:41,045 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2021-05-02 23:01:41,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:41,073 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:41,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41 WrapperNode [2021-05-02 23:01:41,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:41,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:41,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:41,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:41,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... [2021-05-02 23:01:41,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:41,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:41,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:41,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:41,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:41,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:41,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:41,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:41,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:01:41,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:01:41,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:41,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:41,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:41,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:41,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:41,419 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 23:01:41,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:41 BoogieIcfgContainer [2021-05-02 23:01:41,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:41,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:41,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:41,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:41,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:40" (1/3) ... [2021-05-02 23:01:41,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a308ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:41" (2/3) ... [2021-05-02 23:01:41,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a308ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:41, skipping insertion in model container [2021-05-02 23:01:41,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:41" (3/3) ... [2021-05-02 23:01:41,437 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-05-02 23:01:41,440 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:41,443 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:41,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:41,468 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:41,468 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:41,468 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:41,468 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:41,469 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:41,469 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:41,469 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:41,469 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:41,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:41,488 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:41,488 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:41,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2021-05-02 23:01:41,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:41,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753693130] [2021-05-02 23:01:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:41,537 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:41,701 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:41,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753693130] [2021-05-02 23:01:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753693130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:41,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:41,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:01:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637152896] [2021-05-02 23:01:41,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:01:41,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:01:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:01:41,717 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:41,855 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-05-02 23:01:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:01:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 23:01:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:41,861 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:01:41,861 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:01:41,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:01:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 23:01:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-05-02 23:01:41,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-05-02 23:01:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:41,892 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-05-02 23:01:41,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-05-02 23:01:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:01:41,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:41,893 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:41,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:41,893 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2021-05-02 23:01:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:41,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223162200] [2021-05-02 23:01:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:41,907 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:41,908 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:42,217 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223162200] [2021-05-02 23:01:42,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1223162200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732336010] [2021-05-02 23:01:42,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:42,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:42,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:42,219 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,380 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-05-02 23:01:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:01:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 23:01:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,382 INFO L225 Difference]: With dead ends: 55 [2021-05-02 23:01:42,382 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:01:42,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:01:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 23:01:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-05-02 23:01:42,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2021-05-02 23:01:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,400 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-05-02 23:01:42,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-05-02 23:01:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 23:01:42,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,402 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:42,403 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,403 INFO L82 PathProgramCache]: Analyzing trace with hash 440297925, now seen corresponding path program 2 times [2021-05-02 23:01:42,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86393645] [2021-05-02 23:01:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,415 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:42,418 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:42,595 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 23:01:42,596 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:42,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86393645] [2021-05-02 23:01:42,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [86393645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:42,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:42,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:42,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164817328] [2021-05-02 23:01:42,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:42,597 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:42,780 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-02 23:01:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 23:01:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:42,783 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:01:42,783 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:01:42,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:01:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-05-02 23:01:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 23:01:42,800 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2021-05-02 23:01:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:42,801 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 23:01:42,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 23:01:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:01:42,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:42,802 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:42,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:42,802 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2021-05-02 23:01:42,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:42,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22452839] [2021-05-02 23:01:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:42,808 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:42,809 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:43,225 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22452839] [2021-05-02 23:01:43,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [22452839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:01:43,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876457282] [2021-05-02 23:01:43,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:01:43,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:01:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:01:43,228 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,649 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 23:01:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:01:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:01:43,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,650 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:01:43,650 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 23:01:43,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:01:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 23:01:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-05-02 23:01:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-05-02 23:01:43,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2021-05-02 23:01:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,659 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-05-02 23:01:43,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-05-02 23:01:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 23:01:43,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,660 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:43,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:01:43,660 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -367033030, now seen corresponding path program 1 times [2021-05-02 23:01:43,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481310763] [2021-05-02 23:01:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,665 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,666 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:43,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:43,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481310763] [2021-05-02 23:01:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [481310763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:43,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:43,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:01:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848927896] [2021-05-02 23:01:43,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:01:43,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:01:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:01:43,727 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:43,795 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-05-02 23:01:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:01:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 23:01:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:43,800 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:01:43,800 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:01:43,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:01:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-05-02 23:01:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-02 23:01:43,816 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2021-05-02 23:01:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:43,816 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-02 23:01:43,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-02 23:01:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:01:43,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:43,818 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:43,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:01:43,818 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:43,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:43,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2021-05-02 23:01:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634477830] [2021-05-02 23:01:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:43,829 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:43,830 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:44,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:44,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634477830] [2021-05-02 23:01:44,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1634477830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:44,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:44,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:01:44,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119114734] [2021-05-02 23:01:44,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:01:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:01:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:01:44,192 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23:01:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:44,896 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2021-05-02 23:01:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:01:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23:01:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:44,898 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:01:44,898 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:01:44,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:01:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:01:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2021-05-02 23:01:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-02 23:01:44,917 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2021-05-02 23:01:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-02 23:01:44,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 23:01:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-02 23:01:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 23:01:44,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:44,920 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:44,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:01:44,920 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2021-05-02 23:01:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:44,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842925980] [2021-05-02 23:01:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:44,926 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:44,926 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,021 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 23:01:45,021 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842925980] [2021-05-02 23:01:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [842925980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:45,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883075747] [2021-05-02 23:01:45,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:45,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:45,026 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:45,167 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2021-05-02 23:01:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:01:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 23:01:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:45,168 INFO L225 Difference]: With dead ends: 147 [2021-05-02 23:01:45,168 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 23:01:45,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:01:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 23:01:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-05-02 23:01:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-05-02 23:01:45,192 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 31 [2021-05-02 23:01:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:45,192 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-05-02 23:01:45,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-05-02 23:01:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:01:45,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:45,193 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:45,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:01:45,193 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2021-05-02 23:01:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:45,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669880012] [2021-05-02 23:01:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:45,197 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:45,198 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 23:01:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:45,295 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669880012] [2021-05-02 23:01:45,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [669880012] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:01:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85487006] [2021-05-02 23:01:45,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:01:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:01:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:45,296 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:45,432 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 23:01:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:01:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-02 23:01:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:45,434 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:01:45,434 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:01:45,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:01:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-05-02 23:01:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 23:01:45,444 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2021-05-02 23:01:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:45,444 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 23:01:45,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 23:01:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:01:45,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:45,445 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:45,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:01:45,445 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2021-05-02 23:01:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:45,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477446638] [2021-05-02 23:01:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:45,449 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:45,450 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:45,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:45,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477446638] [2021-05-02 23:01:45,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477446638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:45,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:45,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:01:45,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126923634] [2021-05-02 23:01:45,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:01:45,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:01:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:01:45,726 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:46,151 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2021-05-02 23:01:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:01:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 23:01:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:46,153 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:01:46,153 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 23:01:46,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 23:01:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 76. [2021-05-02 23:01:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2021-05-02 23:01:46,165 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 33 [2021-05-02 23:01:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:46,165 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2021-05-02 23:01:46,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2021-05-02 23:01:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:01:46,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:46,166 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:46,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:01:46,166 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2021-05-02 23:01:46,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:46,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332983831] [2021-05-02 23:01:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:46,172 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:46,173 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:46,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:46,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332983831] [2021-05-02 23:01:46,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [332983831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:46,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:46,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:01:46,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708295572] [2021-05-02 23:01:46,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:01:46,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:46,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:01:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:46,378 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 17 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 23:01:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:47,132 INFO L93 Difference]: Finished difference Result 219 states and 274 transitions. [2021-05-02 23:01:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:01:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 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 23:01:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:47,134 INFO L225 Difference]: With dead ends: 219 [2021-05-02 23:01:47,134 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:01:47,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:01:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:01:47,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 87. [2021-05-02 23:01:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 80 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-05-02 23:01:47,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 38 [2021-05-02 23:01:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:47,156 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-05-02 23:01:47,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 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 23:01:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-05-02 23:01:47,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:01:47,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:47,157 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:47,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:01:47,157 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1626849634, now seen corresponding path program 2 times [2021-05-02 23:01:47,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:47,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17516899] [2021-05-02 23:01:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:47,163 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:47,164 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:47,224 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:47,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17516899] [2021-05-02 23:01:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [17516899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:01:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039482775] [2021-05-02 23:01:47,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:01:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:01:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:01:47,225 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 23:01:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:47,378 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2021-05-02 23:01:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:01:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 38 [2021-05-02 23:01:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:47,380 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:01:47,380 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:01:47,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:01:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:01:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-05-02 23:01:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-05-02 23:01:47,395 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 38 [2021-05-02 23:01:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:47,395 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-05-02 23:01:47,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 23:01:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-05-02 23:01:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:01:47,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:47,395 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:47,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:01:47,396 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2021-05-02 23:01:47,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:47,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829545604] [2021-05-02 23:01:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:47,400 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:47,401 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:47,812 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829545604] [2021-05-02 23:01:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1829545604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:47,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:47,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:01:47,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548579551] [2021-05-02 23:01:47,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:01:47,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:01:47,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:01:47,813 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:01:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:48,321 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-02 23:01:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:01:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:01:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:48,322 INFO L225 Difference]: With dead ends: 129 [2021-05-02 23:01:48,322 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 23:01:48,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:01:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 23:01:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-05-02 23:01:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 87 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-05-02 23:01:48,336 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 38 [2021-05-02 23:01:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:48,336 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-05-02 23:01:48,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:01:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-05-02 23:01:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:01:48,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:48,337 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:48,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:01:48,337 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2021-05-02 23:01:48,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:48,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695665452] [2021-05-02 23:01:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:48,341 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:48,342 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:01:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:48,521 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:48,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695665452] [2021-05-02 23:01:48,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695665452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:48,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:48,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:01:48,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658538115] [2021-05-02 23:01:48,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:01:48,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:01:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:01:48,522 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:48,950 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-05-02 23:01:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:01:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-05-02 23:01:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:48,951 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:01:48,952 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 23:01:48,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:01:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 23:01:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-05-02 23:01:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.2) internal successors, (120), 102 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-05-02 23:01:48,968 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 41 [2021-05-02 23:01:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:48,968 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-05-02 23:01:48,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-05-02 23:01:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 23:01:48,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:48,970 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:48,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:01:48,970 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 4 times [2021-05-02 23:01:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:48,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031306719] [2021-05-02 23:01:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:48,974 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:48,975 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:49,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:49,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031306719] [2021-05-02 23:01:49,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031306719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:49,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:49,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:01:49,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917274183] [2021-05-02 23:01:49,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:01:49,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:01:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:01:49,311 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:50,218 INFO L93 Difference]: Finished difference Result 237 states and 286 transitions. [2021-05-02 23:01:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:01:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 23:01:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:50,219 INFO L225 Difference]: With dead ends: 237 [2021-05-02 23:01:50,219 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:01:50,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:01:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:01:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2021-05-02 23:01:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 101 states have internal predecessors, (118), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2021-05-02 23:01:50,238 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 43 [2021-05-02 23:01:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:50,239 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2021-05-02 23:01:50,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2021-05-02 23:01:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:01:50,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:50,239 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:50,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:01:50,240 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -866950133, now seen corresponding path program 1 times [2021-05-02 23:01:50,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:50,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443859608] [2021-05-02 23:01:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:50,244 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:50,244 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:50,372 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:50,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443859608] [2021-05-02 23:01:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443859608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:50,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:01:50,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531355469] [2021-05-02 23:01:50,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:01:50,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:01:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:50,373 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:50,621 INFO L93 Difference]: Finished difference Result 279 states and 333 transitions. [2021-05-02 23:01:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:01:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 23:01:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:50,623 INFO L225 Difference]: With dead ends: 279 [2021-05-02 23:01:50,623 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 23:01:50,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:01:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 23:01:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 147. [2021-05-02 23:01:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 138 states have internal predecessors, (159), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-05-02 23:01:50,654 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 44 [2021-05-02 23:01:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:50,654 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-05-02 23:01:50,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:01:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-05-02 23:01:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:01:50,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:50,655 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:50,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:01:50,655 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:50,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:50,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2021-05-02 23:01:50,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:50,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294431847] [2021-05-02 23:01:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:50,659 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:50,660 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-02 23:01:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:50,861 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:50,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294431847] [2021-05-02 23:01:50,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294431847] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:50,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:50,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:01:50,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301595175] [2021-05-02 23:01:50,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:01:50,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:01:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:50,862 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:51,410 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2021-05-02 23:01:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:01:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-05-02 23:01:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:51,411 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:01:51,411 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:01:51,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:01:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:01:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2021-05-02 23:01:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 139 states have internal predecessors, (161), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2021-05-02 23:01:51,464 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 46 [2021-05-02 23:01:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:51,464 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2021-05-02 23:01:51,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2021-05-02 23:01:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:01:51,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:51,465 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:51,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:01:51,465 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 2 times [2021-05-02 23:01:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:51,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398738010] [2021-05-02 23:01:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:51,468 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:51,469 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:51,978 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 23:01:51,978 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:51,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398738010] [2021-05-02 23:01:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [398738010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:51,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:51,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:01:51,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618703349] [2021-05-02 23:01:51,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:01:51,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:01:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:01:51,980 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 23:01:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:52,856 INFO L93 Difference]: Finished difference Result 283 states and 333 transitions. [2021-05-02 23:01:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:01:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 23:01:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:52,858 INFO L225 Difference]: With dead ends: 283 [2021-05-02 23:01:52,858 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:01:52,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:01:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:01:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 159. [2021-05-02 23:01:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 150 states have internal predecessors, (175), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-02 23:01:52,888 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 46 [2021-05-02 23:01:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:52,888 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-02 23:01:52,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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 23:01:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-02 23:01:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:01:52,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:52,889 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:52,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:01:52,889 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2021-05-02 23:01:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:52,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964654022] [2021-05-02 23:01:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:52,892 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:52,893 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:53,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:53,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964654022] [2021-05-02 23:01:53,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964654022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:53,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:01:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643995565] [2021-05-02 23:01:53,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:01:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:01:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:01:53,192 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 20 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 23:01:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:54,074 INFO L93 Difference]: Finished difference Result 258 states and 304 transitions. [2021-05-02 23:01:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:01:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 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 46 [2021-05-02 23:01:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:54,076 INFO L225 Difference]: With dead ends: 258 [2021-05-02 23:01:54,076 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 23:01:54,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:01:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 23:01:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 184. [2021-05-02 23:01:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 173 states have (on average 1.2080924855491328) internal successors, (209), 175 states have internal predecessors, (209), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-05-02 23:01:54,121 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 46 [2021-05-02 23:01:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:54,121 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-05-02 23:01:54,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 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 23:01:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-05-02 23:01:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:01:54,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:54,121 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:54,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:01:54,122 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash -564916451, now seen corresponding path program 5 times [2021-05-02 23:01:54,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:54,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531753426] [2021-05-02 23:01:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:54,127 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:54,128 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:54,580 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531753426] [2021-05-02 23:01:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [531753426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:54,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:54,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:01:54,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233096210] [2021-05-02 23:01:54,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:01:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:01:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:01:54,581 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 23:01:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:55,420 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2021-05-02 23:01:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:01:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 46 [2021-05-02 23:01:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:55,422 INFO L225 Difference]: With dead ends: 251 [2021-05-02 23:01:55,422 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 23:01:55,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:01:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 23:01:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 206. [2021-05-02 23:01:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 193 states have (on average 1.2020725388601037) internal successors, (232), 196 states have internal predecessors, (232), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 23:01:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 245 transitions. [2021-05-02 23:01:55,460 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 245 transitions. Word has length 46 [2021-05-02 23:01:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:55,460 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 245 transitions. [2021-05-02 23:01:55,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 23:01:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 245 transitions. [2021-05-02 23:01:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:01:55,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:55,461 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:55,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:01:55,461 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2021-05-02 23:01:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:55,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990953287] [2021-05-02 23:01:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:55,464 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:55,465 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 23:01:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:01:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:55,581 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:55,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990953287] [2021-05-02 23:01:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [990953287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:55,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:55,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:01:55,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401044576] [2021-05-02 23:01:55,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:01:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:01:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:01:55,582 INFO L87 Difference]: Start difference. First operand 206 states and 245 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:55,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:55,878 INFO L93 Difference]: Finished difference Result 303 states and 362 transitions. [2021-05-02 23:01:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:01:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-05-02 23:01:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:55,880 INFO L225 Difference]: With dead ends: 303 [2021-05-02 23:01:55,880 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 23:01:55,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:01:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 23:01:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2021-05-02 23:01:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 185 states have (on average 1.1837837837837837) internal successors, (219), 188 states have internal predecessors, (219), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:01:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 231 transitions. [2021-05-02 23:01:55,924 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 231 transitions. Word has length 49 [2021-05-02 23:01:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:55,925 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 231 transitions. [2021-05-02 23:01:55,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 231 transitions. [2021-05-02 23:01:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 23:01:55,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:55,925 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:55,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:01:55,925 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2021-05-02 23:01:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046618336] [2021-05-02 23:01:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:55,930 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:55,931 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:01:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:56,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:56,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046618336] [2021-05-02 23:01:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1046618336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:56,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:56,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:01:56,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325269995] [2021-05-02 23:01:56,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:01:56,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:01:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:01:56,160 INFO L87 Difference]: Start difference. First operand 197 states and 231 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:56,805 INFO L93 Difference]: Finished difference Result 234 states and 276 transitions. [2021-05-02 23:01:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:01:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-05-02 23:01:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:56,806 INFO L225 Difference]: With dead ends: 234 [2021-05-02 23:01:56,806 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 23:01:56,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:01:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 23:01:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 211. [2021-05-02 23:01:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 200 states have internal predecessors, (229), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:01:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 247 transitions. [2021-05-02 23:01:56,846 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 247 transitions. Word has length 49 [2021-05-02 23:01:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:56,846 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 247 transitions. [2021-05-02 23:01:56,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 247 transitions. [2021-05-02 23:01:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:01:56,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:56,847 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:56,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:01:56,847 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2021-05-02 23:01:56,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:56,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292549881] [2021-05-02 23:01:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:56,851 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:56,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:57,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-05-02 23:01:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:57,456 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:57,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292549881] [2021-05-02 23:01:57,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292549881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:57,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:01:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389506450] [2021-05-02 23:01:57,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:01:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:01:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:01:57,457 INFO L87 Difference]: Start difference. First operand 211 states and 247 transitions. Second operand has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:58,695 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2021-05-02 23:01:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:01:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-05-02 23:01:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:58,696 INFO L225 Difference]: With dead ends: 269 [2021-05-02 23:01:58,696 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 23:01:58,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=293, Invalid=1963, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:01:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 23:01:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-05-02 23:01:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 208 states have (on average 1.1634615384615385) internal successors, (242), 213 states have internal predecessors, (242), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:01:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 260 transitions. [2021-05-02 23:01:58,741 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 260 transitions. Word has length 51 [2021-05-02 23:01:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,742 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 260 transitions. [2021-05-02 23:01:58,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:01:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 260 transitions. [2021-05-02 23:01:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:01:58,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,743 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:01:58,743 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash 455716478, now seen corresponding path program 1 times [2021-05-02 23:01:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131846222] [2021-05-02 23:01:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:58,747 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:58,748 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:58,790 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:58,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131846222] [2021-05-02 23:01:58,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [131846222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:58,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:58,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:01:58,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493380385] [2021-05-02 23:01:58,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:01:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:01:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:01:58,791 INFO L87 Difference]: Start difference. First operand 224 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23:01:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:58,934 INFO L93 Difference]: Finished difference Result 310 states and 365 transitions. [2021-05-02 23:01:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:01:58,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 51 [2021-05-02 23:01:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:58,936 INFO L225 Difference]: With dead ends: 310 [2021-05-02 23:01:58,936 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:01:58,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:01:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:01:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 212. [2021-05-02 23:01:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 196 states have (on average 1.1479591836734695) internal successors, (225), 201 states have internal predecessors, (225), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:01:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2021-05-02 23:01:58,983 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 51 [2021-05-02 23:01:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:58,983 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2021-05-02 23:01:58,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 23:01:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2021-05-02 23:01:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:01:58,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:58,984 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:58,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:01:58,984 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1181899854, now seen corresponding path program 1 times [2021-05-02 23:01:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:58,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843994744] [2021-05-02 23:01:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:58,988 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:58,989 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:59,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:01:59,513 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:59,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843994744] [2021-05-02 23:01:59,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843994744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:59,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:59,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:01:59,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075116600] [2021-05-02 23:01:59,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:01:59,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:59,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:01:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:01:59,514 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:00,797 INFO L93 Difference]: Finished difference Result 333 states and 390 transitions. [2021-05-02 23:02:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:02:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:02:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:00,799 INFO L225 Difference]: With dead ends: 333 [2021-05-02 23:02:00,799 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 23:02:00,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:02:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 23:02:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 232. [2021-05-02 23:02:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 216 states have (on average 1.1666666666666667) internal successors, (252), 221 states have internal predecessors, (252), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 23:02:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2021-05-02 23:02:00,849 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 51 [2021-05-02 23:02:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:00,849 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2021-05-02 23:02:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2021-05-02 23:02:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:02:00,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:00,850 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:00,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:02:00,850 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 6 times [2021-05-02 23:02:00,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:00,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348204482] [2021-05-02 23:02:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:00,854 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:00,854 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:01,299 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:01,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348204482] [2021-05-02 23:02:01,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [348204482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:01,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:01,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:02:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015453792] [2021-05-02 23:02:01,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:02:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:02:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:02:01,300 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:02,505 INFO L93 Difference]: Finished difference Result 338 states and 403 transitions. [2021-05-02 23:02:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:02:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:02:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:02,507 INFO L225 Difference]: With dead ends: 338 [2021-05-02 23:02:02,507 INFO L226 Difference]: Without dead ends: 336 [2021-05-02 23:02:02,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-02 23:02:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 255. [2021-05-02 23:02:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.1875) internal successors, (285), 244 states have internal predecessors, (285), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 301 transitions. [2021-05-02 23:02:02,564 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 301 transitions. Word has length 51 [2021-05-02 23:02:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:02,564 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 301 transitions. [2021-05-02 23:02:02,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 301 transitions. [2021-05-02 23:02:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:02:02,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:02,565 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:02,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:02:02,565 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1824744982, now seen corresponding path program 2 times [2021-05-02 23:02:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:02,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916908307] [2021-05-02 23:02:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:02,571 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:02,572 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:03,130 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:03,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916908307] [2021-05-02 23:02:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916908307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:03,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:03,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:03,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199698011] [2021-05-02 23:02:03,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:03,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:03,131 INFO L87 Difference]: Start difference. First operand 255 states and 301 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:04,047 INFO L93 Difference]: Finished difference Result 391 states and 466 transitions. [2021-05-02 23:02:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:02:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 23:02:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:04,049 INFO L225 Difference]: With dead ends: 391 [2021-05-02 23:02:04,049 INFO L226 Difference]: Without dead ends: 317 [2021-05-02 23:02:04,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 784.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-02 23:02:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 267. [2021-05-02 23:02:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 252 states have (on average 1.1944444444444444) internal successors, (301), 256 states have internal predecessors, (301), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 23:02:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2021-05-02 23:02:04,114 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 51 [2021-05-02 23:02:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:04,114 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2021-05-02 23:02:04,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2021-05-02 23:02:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:02:04,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:04,115 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:04,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:02:04,115 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash 636186535, now seen corresponding path program 1 times [2021-05-02 23:02:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:04,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369712768] [2021-05-02 23:02:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:04,119 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:04,119 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 23:02:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:04,343 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369712768] [2021-05-02 23:02:04,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [369712768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:04,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:04,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:02:04,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291047797] [2021-05-02 23:02:04,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:02:04,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:04,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:02:04,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:04,344 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:05,284 INFO L93 Difference]: Finished difference Result 544 states and 666 transitions. [2021-05-02 23:02:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-05-02 23:02:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:05,286 INFO L225 Difference]: With dead ends: 544 [2021-05-02 23:02:05,286 INFO L226 Difference]: Without dead ends: 421 [2021-05-02 23:02:05,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-02 23:02:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 318. [2021-05-02 23:02:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 298 states have (on average 1.2013422818791946) internal successors, (358), 305 states have internal predecessors, (358), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:02:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 382 transitions. [2021-05-02 23:02:05,361 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 382 transitions. Word has length 54 [2021-05-02 23:02:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:05,362 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 382 transitions. [2021-05-02 23:02:05,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 382 transitions. [2021-05-02 23:02:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:02:05,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:05,363 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:05,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:02:05,363 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 2 times [2021-05-02 23:02:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:05,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777103183] [2021-05-02 23:02:05,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:05,367 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:05,368 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 23:02:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:05,910 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:05,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777103183] [2021-05-02 23:02:05,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [777103183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:05,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:05,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:02:05,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633623457] [2021-05-02 23:02:05,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:02:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:02:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:02:05,911 INFO L87 Difference]: Start difference. First operand 318 states and 382 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:07,108 INFO L93 Difference]: Finished difference Result 478 states and 571 transitions. [2021-05-02 23:02:07,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:02:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-05-02 23:02:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:07,110 INFO L225 Difference]: With dead ends: 478 [2021-05-02 23:02:07,110 INFO L226 Difference]: Without dead ends: 384 [2021-05-02 23:02:07,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:02:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-02 23:02:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 321. [2021-05-02 23:02:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 301 states have (on average 1.1993355481727574) internal successors, (361), 308 states have internal predecessors, (361), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 23:02:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 385 transitions. [2021-05-02 23:02:07,184 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 385 transitions. Word has length 54 [2021-05-02 23:02:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:07,185 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 385 transitions. [2021-05-02 23:02:07,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 385 transitions. [2021-05-02 23:02:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:02:07,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:07,185 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:07,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:02:07,186 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:07,186 INFO L82 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2021-05-02 23:02:07,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:07,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042037047] [2021-05-02 23:02:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:07,189 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:07,190 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-05-02 23:02:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:07,905 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:07,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042037047] [2021-05-02 23:02:07,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042037047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:07,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:07,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:02:07,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409677733] [2021-05-02 23:02:07,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:02:07,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:07,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:02:07,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:07,906 INFO L87 Difference]: Start difference. First operand 321 states and 385 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:09,170 INFO L93 Difference]: Finished difference Result 384 states and 463 transitions. [2021-05-02 23:02:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:02:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2021-05-02 23:02:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:09,171 INFO L225 Difference]: With dead ends: 384 [2021-05-02 23:02:09,172 INFO L226 Difference]: Without dead ends: 346 [2021-05-02 23:02:09,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1126.1ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:02:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-02 23:02:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 288. [2021-05-02 23:02:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 272 states have (on average 1.224264705882353) internal successors, (333), 277 states have internal predecessors, (333), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 23:02:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2021-05-02 23:02:09,239 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 56 [2021-05-02 23:02:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:09,239 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2021-05-02 23:02:09,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2021-05-02 23:02:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:02:09,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:09,240 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:09,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:02:09,240 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2021-05-02 23:02:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:09,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999911967] [2021-05-02 23:02:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:09,243 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:09,244 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:02:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:02:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:09,582 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 23:02:09,582 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:09,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999911967] [2021-05-02 23:02:09,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1999911967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:09,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:09,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:02:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797900398] [2021-05-02 23:02:09,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:02:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:02:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:02:09,583 INFO L87 Difference]: Start difference. First operand 288 states and 352 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:10,319 INFO L93 Difference]: Finished difference Result 468 states and 570 transitions. [2021-05-02 23:02:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:02:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2021-05-02 23:02:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:10,321 INFO L225 Difference]: With dead ends: 468 [2021-05-02 23:02:10,321 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 23:02:10,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 23:02:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 329. [2021-05-02 23:02:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 305 states have (on average 1.2065573770491804) internal successors, (368), 313 states have internal predecessors, (368), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 401 transitions. [2021-05-02 23:02:10,405 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 401 transitions. Word has length 57 [2021-05-02 23:02:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:10,405 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 401 transitions. [2021-05-02 23:02:10,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 401 transitions. [2021-05-02 23:02:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:02:10,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:10,406 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:10,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:02:10,406 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1889457963, now seen corresponding path program 3 times [2021-05-02 23:02:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:10,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917105832] [2021-05-02 23:02:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:10,412 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:10,414 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:10,955 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917105832] [2021-05-02 23:02:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [917105832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:10,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:10,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:02:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287163136] [2021-05-02 23:02:10,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:02:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:02:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:02:10,956 INFO L87 Difference]: Start difference. First operand 329 states and 401 transitions. Second operand has 25 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 23:02:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:12,125 INFO L93 Difference]: Finished difference Result 383 states and 468 transitions. [2021-05-02 23:02:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 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 56 [2021-05-02 23:02:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:12,127 INFO L225 Difference]: With dead ends: 383 [2021-05-02 23:02:12,127 INFO L226 Difference]: Without dead ends: 381 [2021-05-02 23:02:12,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:02:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-02 23:02:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 333. [2021-05-02 23:02:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 308 states have (on average 1.2045454545454546) internal successors, (371), 316 states have internal predecessors, (371), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 404 transitions. [2021-05-02 23:02:12,213 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 404 transitions. Word has length 56 [2021-05-02 23:02:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:12,213 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 404 transitions. [2021-05-02 23:02:12,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 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 23:02:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 404 transitions. [2021-05-02 23:02:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:02:12,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:12,214 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:12,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:02:12,214 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -439649873, now seen corresponding path program 2 times [2021-05-02 23:02:12,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:12,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93861621] [2021-05-02 23:02:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:12,217 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:12,218 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:12,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93861621] [2021-05-02 23:02:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [93861621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:12,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:12,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:02:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141666639] [2021-05-02 23:02:12,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:02:12,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:12,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:02:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:12,351 INFO L87 Difference]: Start difference. First operand 333 states and 404 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:12,777 INFO L93 Difference]: Finished difference Result 772 states and 946 transitions. [2021-05-02 23:02:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:02:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 23:02:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:12,795 INFO L225 Difference]: With dead ends: 772 [2021-05-02 23:02:12,795 INFO L226 Difference]: Without dead ends: 614 [2021-05-02 23:02:12,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:02:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-02 23:02:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 453. [2021-05-02 23:02:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 428 states have (on average 1.1822429906542056) internal successors, (506), 436 states have internal predecessors, (506), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 539 transitions. [2021-05-02 23:02:12,923 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 539 transitions. Word has length 57 [2021-05-02 23:02:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:12,923 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 539 transitions. [2021-05-02 23:02:12,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:12,923 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 539 transitions. [2021-05-02 23:02:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:02:12,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:12,924 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:12,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:02:12,924 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2021-05-02 23:02:12,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:12,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78960042] [2021-05-02 23:02:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:12,932 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:12,933 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:13,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 23:02:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:13,144 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 23:02:13,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:13,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78960042] [2021-05-02 23:02:13,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [78960042] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:13,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:13,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:02:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455398116] [2021-05-02 23:02:13,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:02:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:02:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:02:13,146 INFO L87 Difference]: Start difference. First operand 453 states and 539 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:14,136 INFO L93 Difference]: Finished difference Result 537 states and 644 transitions. [2021-05-02 23:02:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:02:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2021-05-02 23:02:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:14,139 INFO L225 Difference]: With dead ends: 537 [2021-05-02 23:02:14,139 INFO L226 Difference]: Without dead ends: 535 [2021-05-02 23:02:14,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:02:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-02 23:02:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 465. [2021-05-02 23:02:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 439 states have (on average 1.182232346241458) internal successors, (519), 448 states have internal predecessors, (519), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:02:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 554 transitions. [2021-05-02 23:02:14,262 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 554 transitions. Word has length 59 [2021-05-02 23:02:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:14,262 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 554 transitions. [2021-05-02 23:02:14,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 554 transitions. [2021-05-02 23:02:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:02:14,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:14,263 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:14,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:02:14,263 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2021-05-02 23:02:14,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:14,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658026832] [2021-05-02 23:02:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:14,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:14,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 23:02:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:15,133 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658026832] [2021-05-02 23:02:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658026832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:15,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:15,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:02:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005851338] [2021-05-02 23:02:15,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:02:15,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:15,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:02:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:15,135 INFO L87 Difference]: Start difference. First operand 465 states and 554 transitions. Second operand has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:17,588 INFO L93 Difference]: Finished difference Result 546 states and 645 transitions. [2021-05-02 23:02:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:02:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2021-05-02 23:02:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:17,590 INFO L225 Difference]: With dead ends: 546 [2021-05-02 23:02:17,591 INFO L226 Difference]: Without dead ends: 544 [2021-05-02 23:02:17,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2154.2ms TimeCoverageRelationStatistics Valid=643, Invalid=4327, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:02:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-02 23:02:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 469. [2021-05-02 23:02:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 442 states have (on average 1.1809954751131222) internal successors, (522), 451 states have internal predecessors, (522), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 8 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:02:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 557 transitions. [2021-05-02 23:02:17,722 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 557 transitions. Word has length 59 [2021-05-02 23:02:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:17,722 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 557 transitions. [2021-05-02 23:02:17,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 557 transitions. [2021-05-02 23:02:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:02:17,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:17,723 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:17,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:02:17,723 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash -403648979, now seen corresponding path program 3 times [2021-05-02 23:02:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:17,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107655105] [2021-05-02 23:02:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:17,727 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:17,728 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:18,072 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:18,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107655105] [2021-05-02 23:02:18,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [107655105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:18,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:18,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:18,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483650673] [2021-05-02 23:02:18,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:18,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:18,073 INFO L87 Difference]: Start difference. First operand 469 states and 557 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 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 23:02:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:19,130 INFO L93 Difference]: Finished difference Result 534 states and 636 transitions. [2021-05-02 23:02:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 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 59 [2021-05-02 23:02:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:19,132 INFO L225 Difference]: With dead ends: 534 [2021-05-02 23:02:19,132 INFO L226 Difference]: Without dead ends: 532 [2021-05-02 23:02:19,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-02 23:02:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 477. [2021-05-02 23:02:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 451 states have (on average 1.1840354767184036) internal successors, (534), 459 states have internal predecessors, (534), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 567 transitions. [2021-05-02 23:02:19,267 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 567 transitions. Word has length 59 [2021-05-02 23:02:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:19,267 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 567 transitions. [2021-05-02 23:02:19,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 19 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 23:02:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 567 transitions. [2021-05-02 23:02:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:02:19,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:19,268 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:19,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:02:19,268 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:19,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1813715541, now seen corresponding path program 4 times [2021-05-02 23:02:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748894771] [2021-05-02 23:02:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:19,274 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:19,275 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:19,841 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:19,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748894771] [2021-05-02 23:02:19,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [748894771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:19,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:19,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:02:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579760127] [2021-05-02 23:02:19,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:02:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:02:19,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:02:19,843 INFO L87 Difference]: Start difference. First operand 477 states and 567 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:21,047 INFO L93 Difference]: Finished difference Result 654 states and 777 transitions. [2021-05-02 23:02:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:02:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:02:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:21,054 INFO L225 Difference]: With dead ends: 654 [2021-05-02 23:02:21,054 INFO L226 Difference]: Without dead ends: 556 [2021-05-02 23:02:21,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 849.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:02:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-02 23:02:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 501. [2021-05-02 23:02:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 472 states have (on average 1.1822033898305084) internal successors, (558), 482 states have internal predecessors, (558), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:02:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 595 transitions. [2021-05-02 23:02:21,188 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 595 transitions. Word has length 59 [2021-05-02 23:02:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:21,188 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 595 transitions. [2021-05-02 23:02:21,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 595 transitions. [2021-05-02 23:02:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:02:21,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:21,189 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:21,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:02:21,189 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash -715377509, now seen corresponding path program 5 times [2021-05-02 23:02:21,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:21,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192310496] [2021-05-02 23:02:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:21,194 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:21,195 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:22,165 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:22,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192310496] [2021-05-02 23:02:22,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [192310496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:22,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:22,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:02:22,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267579346] [2021-05-02 23:02:22,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:02:22,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:02:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:02:22,167 INFO L87 Difference]: Start difference. First operand 501 states and 595 transitions. Second operand has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:24,081 INFO L93 Difference]: Finished difference Result 610 states and 726 transitions. [2021-05-02 23:02:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:02:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-02 23:02:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:24,091 INFO L225 Difference]: With dead ends: 610 [2021-05-02 23:02:24,091 INFO L226 Difference]: Without dead ends: 608 [2021-05-02 23:02:24,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1602.2ms TimeCoverageRelationStatistics Valid=544, Invalid=2762, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:02:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-02 23:02:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 501. [2021-05-02 23:02:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 472 states have (on average 1.1822033898305084) internal successors, (558), 482 states have internal predecessors, (558), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:02:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 595 transitions. [2021-05-02 23:02:24,233 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 595 transitions. Word has length 59 [2021-05-02 23:02:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:24,233 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 595 transitions. [2021-05-02 23:02:24,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 595 transitions. [2021-05-02 23:02:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:02:24,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:24,235 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:24,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:02:24,235 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 2 times [2021-05-02 23:02:24,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:24,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844911986] [2021-05-02 23:02:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:24,238 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:24,239 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 23:02:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 23:02:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:24,595 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 23:02:24,595 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844911986] [2021-05-02 23:02:24,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [844911986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:24,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:24,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:24,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946476786] [2021-05-02 23:02:24,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:24,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:24,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:24,596 INFO L87 Difference]: Start difference. First operand 501 states and 595 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:25,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:25,569 INFO L93 Difference]: Finished difference Result 579 states and 690 transitions. [2021-05-02 23:02:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:02:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-05-02 23:02:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:25,572 INFO L225 Difference]: With dead ends: 579 [2021-05-02 23:02:25,572 INFO L226 Difference]: Without dead ends: 577 [2021-05-02 23:02:25,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:02:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-02 23:02:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 498. [2021-05-02 23:02:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 469 states have (on average 1.183368869936034) internal successors, (555), 479 states have internal predecessors, (555), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 23:02:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 592 transitions. [2021-05-02 23:02:25,723 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 592 transitions. Word has length 62 [2021-05-02 23:02:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:25,724 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 592 transitions. [2021-05-02 23:02:25,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 592 transitions. [2021-05-02 23:02:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:02:25,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:25,725 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:25,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:02:25,725 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 3 times [2021-05-02 23:02:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:25,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275885533] [2021-05-02 23:02:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:25,730 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:25,730 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 23:02:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:26,131 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:26,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275885533] [2021-05-02 23:02:26,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275885533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:26,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:26,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:26,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737008906] [2021-05-02 23:02:26,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:26,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:26,133 INFO L87 Difference]: Start difference. First operand 498 states and 592 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:27,162 INFO L93 Difference]: Finished difference Result 630 states and 755 transitions. [2021-05-02 23:02:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:02:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-05-02 23:02:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:27,165 INFO L225 Difference]: With dead ends: 630 [2021-05-02 23:02:27,165 INFO L226 Difference]: Without dead ends: 628 [2021-05-02 23:02:27,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:02:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-05-02 23:02:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 528. [2021-05-02 23:02:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 497 states have (on average 1.1891348088531186) internal successors, (591), 509 states have internal predecessors, (591), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 7 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 23:02:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 630 transitions. [2021-05-02 23:02:27,312 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 630 transitions. Word has length 62 [2021-05-02 23:02:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:27,312 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 630 transitions. [2021-05-02 23:02:27,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 630 transitions. [2021-05-02 23:02:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:02:27,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:27,313 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:27,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:02:27,313 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2048520356, now seen corresponding path program 4 times [2021-05-02 23:02:27,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:27,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670030359] [2021-05-02 23:02:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:27,317 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:27,317 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:27,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 23:02:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:27,579 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:27,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670030359] [2021-05-02 23:02:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670030359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:27,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:27,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112978916] [2021-05-02 23:02:27,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:27,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:27,580 INFO L87 Difference]: Start difference. First operand 528 states and 630 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:28,779 INFO L93 Difference]: Finished difference Result 696 states and 837 transitions. [2021-05-02 23:02:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:02:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-05-02 23:02:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:28,782 INFO L225 Difference]: With dead ends: 696 [2021-05-02 23:02:28,782 INFO L226 Difference]: Without dead ends: 694 [2021-05-02 23:02:28,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:02:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-02 23:02:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 522. [2021-05-02 23:02:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 494 states have (on average 1.1983805668016194) internal successors, (592), 504 states have internal predecessors, (592), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:02:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 627 transitions. [2021-05-02 23:02:28,936 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 627 transitions. Word has length 62 [2021-05-02 23:02:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:28,936 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 627 transitions. [2021-05-02 23:02:28,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 627 transitions. [2021-05-02 23:02:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:02:28,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:28,937 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:28,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:02:28,938 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1980682524, now seen corresponding path program 3 times [2021-05-02 23:02:28,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:28,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268939734] [2021-05-02 23:02:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:28,943 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:28,943 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 23:02:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:29,609 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 23:02:29,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268939734] [2021-05-02 23:02:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268939734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:29,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:29,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:02:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170711499] [2021-05-02 23:02:29,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:02:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:29,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:02:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:29,610 INFO L87 Difference]: Start difference. First operand 522 states and 627 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:31,599 INFO L93 Difference]: Finished difference Result 795 states and 960 transitions. [2021-05-02 23:02:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:02:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2021-05-02 23:02:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:31,602 INFO L225 Difference]: With dead ends: 795 [2021-05-02 23:02:31,602 INFO L226 Difference]: Without dead ends: 793 [2021-05-02 23:02:31,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1361.5ms TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:02:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-05-02 23:02:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 528. [2021-05-02 23:02:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 500 states have (on average 1.198) internal successors, (599), 510 states have internal predecessors, (599), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 23:02:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 634 transitions. [2021-05-02 23:02:31,767 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 634 transitions. Word has length 62 [2021-05-02 23:02:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:31,767 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 634 transitions. [2021-05-02 23:02:31,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 634 transitions. [2021-05-02 23:02:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:02:31,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:31,769 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:31,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:02:31,769 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:31,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2021-05-02 23:02:31,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:31,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841169408] [2021-05-02 23:02:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:31,772 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:31,773 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 23:02:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:02:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:02:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:31,922 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:31,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841169408] [2021-05-02 23:02:31,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [841169408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:31,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:31,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:02:31,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761593382] [2021-05-02 23:02:31,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:02:31,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:31,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:02:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:02:31,923 INFO L87 Difference]: Start difference. First operand 528 states and 634 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:02:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:32,523 INFO L93 Difference]: Finished difference Result 714 states and 860 transitions. [2021-05-02 23:02:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:02:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2021-05-02 23:02:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:32,525 INFO L225 Difference]: With dead ends: 714 [2021-05-02 23:02:32,525 INFO L226 Difference]: Without dead ends: 657 [2021-05-02 23:02:32,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-02 23:02:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 485. [2021-05-02 23:02:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 459 states have (on average 1.187363834422658) internal successors, (545), 468 states have internal predecessors, (545), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 23:02:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 579 transitions. [2021-05-02 23:02:32,675 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 579 transitions. Word has length 65 [2021-05-02 23:02:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:32,675 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 579 transitions. [2021-05-02 23:02:32,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 23:02:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 579 transitions. [2021-05-02 23:02:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:32,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:32,676 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:32,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:02:32,676 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2021-05-02 23:02:32,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:32,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874020386] [2021-05-02 23:02:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:32,684 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:32,685 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 23:02:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:33,676 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:33,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874020386] [2021-05-02 23:02:33,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874020386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:33,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:33,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:02:33,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958643109] [2021-05-02 23:02:33,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:02:33,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:02:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:02:33,677 INFO L87 Difference]: Start difference. First operand 485 states and 579 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:39,524 INFO L93 Difference]: Finished difference Result 1012 states and 1229 transitions. [2021-05-02 23:02:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:02:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2021-05-02 23:02:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:39,528 INFO L225 Difference]: With dead ends: 1012 [2021-05-02 23:02:39,528 INFO L226 Difference]: Without dead ends: 898 [2021-05-02 23:02:39,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 4512.5ms TimeCoverageRelationStatistics Valid=1467, Invalid=10305, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:02:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-05-02 23:02:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 637. [2021-05-02 23:02:39,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 604 states have (on average 1.1887417218543046) internal successors, (718), 617 states have internal predecessors, (718), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 23:02:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 764 transitions. [2021-05-02 23:02:39,744 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 764 transitions. Word has length 64 [2021-05-02 23:02:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:39,744 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 764 transitions. [2021-05-02 23:02:39,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:02:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 764 transitions. [2021-05-02 23:02:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:02:39,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:39,745 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:39,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:02:39,746 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1602966465, now seen corresponding path program 7 times [2021-05-02 23:02:39,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:39,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463574985] [2021-05-02 23:02:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:39,750 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:39,750 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 23:02:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 23:02:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:40,119 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463574985] [2021-05-02 23:02:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [463574985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:40,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:02:40,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990965213] [2021-05-02 23:02:40,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:02:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:02:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:02:40,120 INFO L87 Difference]: Start difference. First operand 637 states and 764 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:41,060 INFO L93 Difference]: Finished difference Result 707 states and 850 transitions. [2021-05-02 23:02:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:02:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2021-05-02 23:02:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:41,062 INFO L225 Difference]: With dead ends: 707 [2021-05-02 23:02:41,062 INFO L226 Difference]: Without dead ends: 705 [2021-05-02 23:02:41,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:02:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-02 23:02:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 661. [2021-05-02 23:02:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 621 states have (on average 1.183574879227053) internal successors, (735), 637 states have internal predecessors, (735), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (28), 13 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:02:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 793 transitions. [2021-05-02 23:02:41,293 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 793 transitions. Word has length 65 [2021-05-02 23:02:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:41,293 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 793 transitions. [2021-05-02 23:02:41,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:02:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 793 transitions. [2021-05-02 23:02:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:41,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:41,294 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:41,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:02:41,295 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash 873252058, now seen corresponding path program 4 times [2021-05-02 23:02:41,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:41,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396451378] [2021-05-02 23:02:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:41,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:41,299 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:41,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:41,848 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:41,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396451378] [2021-05-02 23:02:41,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396451378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:41,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:02:41,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004278258] [2021-05-02 23:02:41,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:02:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:02:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:02:41,849 INFO L87 Difference]: Start difference. First operand 661 states and 793 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 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 23:02:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:43,416 INFO L93 Difference]: Finished difference Result 830 states and 1003 transitions. [2021-05-02 23:02:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:02:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 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 64 [2021-05-02 23:02:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:43,419 INFO L225 Difference]: With dead ends: 830 [2021-05-02 23:02:43,419 INFO L226 Difference]: Without dead ends: 716 [2021-05-02 23:02:43,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1150.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:02:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-05-02 23:02:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 677. [2021-05-02 23:02:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 637 states have (on average 1.1821036106750393) internal successors, (753), 653 states have internal predecessors, (753), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (28), 13 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 23:02:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 811 transitions. [2021-05-02 23:02:43,668 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 811 transitions. Word has length 64 [2021-05-02 23:02:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:43,668 INFO L480 AbstractCegarLoop]: Abstraction has 677 states and 811 transitions. [2021-05-02 23:02:43,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 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 23:02:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 811 transitions. [2021-05-02 23:02:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:43,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:43,669 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:43,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:02:43,669 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1868426852, now seen corresponding path program 6 times [2021-05-02 23:02:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:43,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814079285] [2021-05-02 23:02:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:43,675 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:43,676 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:44,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:44,366 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:44,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814079285] [2021-05-02 23:02:44,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814079285] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:44,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:44,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:02:44,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754689887] [2021-05-02 23:02:44,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:02:44,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:02:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:44,367 INFO L87 Difference]: Start difference. First operand 677 states and 811 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:47,184 INFO L93 Difference]: Finished difference Result 947 states and 1137 transitions. [2021-05-02 23:02:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:02:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have 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 23:02:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:47,188 INFO L225 Difference]: With dead ends: 947 [2021-05-02 23:02:47,188 INFO L226 Difference]: Without dead ends: 945 [2021-05-02 23:02:47,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1918.1ms TimeCoverageRelationStatistics Valid=776, Invalid=4924, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:02:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-05-02 23:02:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 697. [2021-05-02 23:02:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 653 states have (on average 1.1807044410413476) internal successors, (771), 671 states have internal predecessors, (771), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 13 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 23:02:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 833 transitions. [2021-05-02 23:02:47,433 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 833 transitions. Word has length 64 [2021-05-02 23:02:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:47,433 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 833 transitions. [2021-05-02 23:02:47,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 833 transitions. [2021-05-02 23:02:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:47,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:47,435 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:47,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:02:47,435 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 998054042, now seen corresponding path program 7 times [2021-05-02 23:02:47,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:47,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52621678] [2021-05-02 23:02:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:47,451 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:47,452 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:48,099 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:48,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52621678] [2021-05-02 23:02:48,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [52621678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:48,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:48,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:02:48,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340383205] [2021-05-02 23:02:48,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:02:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:02:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:02:48,100 INFO L87 Difference]: Start difference. First operand 697 states and 833 transitions. Second operand has 28 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 23:02:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:50,293 INFO L93 Difference]: Finished difference Result 1073 states and 1283 transitions. [2021-05-02 23:02:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:02:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 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 64 [2021-05-02 23:02:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:50,296 INFO L225 Difference]: With dead ends: 1073 [2021-05-02 23:02:50,296 INFO L226 Difference]: Without dead ends: 936 [2021-05-02 23:02:50,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1606.7ms TimeCoverageRelationStatistics Valid=522, Invalid=3018, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:02:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-02 23:02:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 826. [2021-05-02 23:02:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 774 states have (on average 1.1795865633074936) internal successors, (913), 797 states have internal predecessors, (913), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:02:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 985 transitions. [2021-05-02 23:02:50,605 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 985 transitions. Word has length 64 [2021-05-02 23:02:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 826 states and 985 transitions. [2021-05-02 23:02:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 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 23:02:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 985 transitions. [2021-05-02 23:02:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:50,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:50,607 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:50,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:02:50,607 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1363947086, now seen corresponding path program 8 times [2021-05-02 23:02:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:50,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889702680] [2021-05-02 23:02:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:50,611 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:50,612 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:51,292 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:51,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889702680] [2021-05-02 23:02:51,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [889702680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:51,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:51,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:02:51,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642107573] [2021-05-02 23:02:51,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:02:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:02:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:02:51,293 INFO L87 Difference]: Start difference. First operand 826 states and 985 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:53,259 INFO L93 Difference]: Finished difference Result 1212 states and 1454 transitions. [2021-05-02 23:02:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:02:53,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 23:02:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:53,263 INFO L225 Difference]: With dead ends: 1212 [2021-05-02 23:02:53,263 INFO L226 Difference]: Without dead ends: 1040 [2021-05-02 23:02:53,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1491.8ms TimeCoverageRelationStatistics Valid=671, Invalid=2635, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:02:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-05-02 23:02:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 852. [2021-05-02 23:02:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 800 states have (on average 1.185) internal successors, (948), 823 states have internal predecessors, (948), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:02:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1020 transitions. [2021-05-02 23:02:53,580 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1020 transitions. Word has length 64 [2021-05-02 23:02:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:53,580 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 1020 transitions. [2021-05-02 23:02:53,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1020 transitions. [2021-05-02 23:02:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:02:53,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:53,581 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:53,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:02:53,581 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1148832980, now seen corresponding path program 9 times [2021-05-02 23:02:53,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:53,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752390969] [2021-05-02 23:02:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:53,586 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:53,586 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:02:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:02:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:02:53,993 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:02:53,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752390969] [2021-05-02 23:02:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [752390969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:02:53,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:02:53,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:02:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422294052] [2021-05-02 23:02:53,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:02:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:02:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:02:53,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:02:53,994 INFO L87 Difference]: Start difference. First operand 852 states and 1020 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:02:55,019 INFO L93 Difference]: Finished difference Result 1174 states and 1416 transitions. [2021-05-02 23:02:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:02:55,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 23:02:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:02:55,022 INFO L225 Difference]: With dead ends: 1174 [2021-05-02 23:02:55,022 INFO L226 Difference]: Without dead ends: 939 [2021-05-02 23:02:55,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:02:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-05-02 23:02:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 880. [2021-05-02 23:02:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 828 states have (on average 1.182367149758454) internal successors, (979), 851 states have internal predecessors, (979), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 13 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 23:02:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1051 transitions. [2021-05-02 23:02:55,348 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1051 transitions. Word has length 64 [2021-05-02 23:02:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:02:55,348 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 1051 transitions. [2021-05-02 23:02:55,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:02:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1051 transitions. [2021-05-02 23:02:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 23:02:55,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:02:55,349 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:02:55,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:02:55,349 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:02:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:02:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -777241936, now seen corresponding path program 2 times [2021-05-02 23:02:55,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:02:55,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47756733] [2021-05-02 23:02:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:02:55,353 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:02:55,354 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:02:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:02:55,370 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:02:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:02:55,388 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:02:55,408 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:02:55,408 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:02:55,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:02:55,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:02:55 BoogieIcfgContainer [2021-05-02 23:02:55,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:02:55,423 INFO L168 Benchmark]: Toolchain (without parser) took 74583.85 ms. Allocated memory was 189.8 MB in the beginning and 571.5 MB in the end (delta: 381.7 MB). Free memory was 155.5 MB in the beginning and 497.9 MB in the end (delta: -342.4 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:55,423 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:02:55,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.97 ms. Allocated memory is still 189.8 MB. Free memory was 155.3 MB in the beginning and 172.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:55,423 INFO L168 Benchmark]: Boogie Preprocessor took 43.33 ms. Allocated memory is still 189.8 MB. Free memory was 172.9 MB in the beginning and 171.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:55,423 INFO L168 Benchmark]: RCFGBuilder took 302.36 ms. Allocated memory is still 189.8 MB. Free memory was 171.3 MB in the beginning and 154.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:55,423 INFO L168 Benchmark]: TraceAbstraction took 73990.17 ms. Allocated memory was 189.8 MB in the beginning and 571.5 MB in the end (delta: 381.7 MB). Free memory was 153.5 MB in the beginning and 497.9 MB in the end (delta: -344.5 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-05-02 23:02:55,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 172.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.97 ms. Allocated memory is still 189.8 MB. Free memory was 155.3 MB in the beginning and 172.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.33 ms. Allocated memory is still 189.8 MB. Free memory was 172.9 MB in the beginning and 171.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.36 ms. Allocated memory is still 189.8 MB. Free memory was 171.3 MB in the beginning and 154.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 73990.17 ms. Allocated memory was 189.8 MB in the beginning and 571.5 MB in the end (delta: 381.7 MB). Free memory was 153.5 MB in the beginning and 497.9 MB in the end (delta: -344.5 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int SIZE=__VERIFIER_nondet_uint(); [L15] int i, j, k, key; [L16] int v[SIZE]; [L17] j=0 [L17] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND TRUE j=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND FALSE !(i<2) [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND TRUE (i>=0) && (v[i]>key) [L23] COND TRUE i<2 [L24] EXPR v[i] [L24] v[i+1] = v[i] [L25] i = i - 1 [L22] (i>=0) && (v[i]>key) [L22] EXPR v[i] [L22] (i>=0) && (v[i]>key) [L22] COND FALSE !((i>=0) && (v[i]>key)) [L27] v[i+1] = key [L19] j++ [L19] COND FALSE !(j