/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:01:03,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:01:03,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:01:03,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:01:03,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:01:03,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:01:03,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:01:03,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:01:03,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:01:03,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:01:03,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:01:03,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:01:03,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:01:03,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:01:03,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:01:03,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:01:03,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:01:03,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:01:03,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:01:03,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:01:03,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:01:03,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:01:03,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:01:03,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:01:03,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:01:03,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:01:03,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:01:03,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:01:03,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:01:03,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:01:03,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:01:03,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:01:03,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:01:03,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:01:03,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:01:03,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:01:03,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:01:03,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:01:03,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:01:03,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:01:03,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:01:03,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:01:03,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:01:03,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:01:03,782 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:01:03,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:01:03,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:01:03,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:01:03,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:01:03,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:01:03,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:01:03,783 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:01:04,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:01:04,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:01:04,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:01:04,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:01:04,268 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:01:04,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-11-07 02:01:04,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95846c98f/7083969d87e24e0abbf312418a38f7e6/FLAGed1299e47 [2020-11-07 02:01:05,052 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:01:05,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-11-07 02:01:05,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95846c98f/7083969d87e24e0abbf312418a38f7e6/FLAGed1299e47 [2020-11-07 02:01:05,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95846c98f/7083969d87e24e0abbf312418a38f7e6 [2020-11-07 02:01:05,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:01:05,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:01:05,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:01:05,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:01:05,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:01:05,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d8a912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05, skipping insertion in model container [2020-11-07 02:01:05,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:01:05,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:01:05,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:01:05,637 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:01:05,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:01:05,681 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:01:05,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05 WrapperNode [2020-11-07 02:01:05,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:01:05,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:01:05,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:01:05,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:01:05,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (1/1) ... [2020-11-07 02:01:05,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:01:05,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:01:05,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:01:05,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:01:05,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (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 [2020-11-07 02:01:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:01:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:01:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:01:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:01:05,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:01:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:01:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:01:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:01:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:01:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:01:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:01:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:01:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:01:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:01:06,422 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:01:06,423 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 02:01:06,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:06 BoogieIcfgContainer [2020-11-07 02:01:06,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:01:06,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:01:06,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:01:06,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:01:06,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:01:05" (1/3) ... [2020-11-07 02:01:06,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4d0ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:06, skipping insertion in model container [2020-11-07 02:01:06,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:05" (2/3) ... [2020-11-07 02:01:06,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4d0ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:01:06, skipping insertion in model container [2020-11-07 02:01:06,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:01:06" (3/3) ... [2020-11-07 02:01:06,439 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-11-07 02:01:06,456 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:01:06,461 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:01:06,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:01:06,509 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:01:06,510 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:01:06,510 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:01:06,510 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:01:06,510 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:01:06,510 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:01:06,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:01:06,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:01:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-11-07 02:01:06,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 02:01:06,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:06,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:06,551 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1667357184, now seen corresponding path program 1 times [2020-11-07 02:01:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:06,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105417076] [2020-11-07 02:01:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:06,660 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:06,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105417076] [2020-11-07 02:01:06,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:06,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:01:06,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824832898] [2020-11-07 02:01:06,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:01:06,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:01:06,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:06,999 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 4 states. [2020-11-07 02:01:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:07,372 INFO L93 Difference]: Finished difference Result 213 states and 246 transitions. [2020-11-07 02:01:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:01:07,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-11-07 02:01:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:07,385 INFO L225 Difference]: With dead ends: 213 [2020-11-07 02:01:07,385 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 02:01:07,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 02:01:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-11-07 02:01:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-07 02:01:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-11-07 02:01:07,444 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 36 [2020-11-07 02:01:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:07,445 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-11-07 02:01:07,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:01:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-11-07 02:01:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:01:07,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:07,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:07,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:01:07,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash 699323677, now seen corresponding path program 1 times [2020-11-07 02:01:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:07,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208740125] [2020-11-07 02:01:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:07,453 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:07,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208740125] [2020-11-07 02:01:07,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:07,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:01:07,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426932573] [2020-11-07 02:01:07,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:01:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:07,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:01:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:01:07,603 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 6 states. [2020-11-07 02:01:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:07,875 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-11-07 02:01:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:01:07,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-11-07 02:01:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:07,878 INFO L225 Difference]: With dead ends: 130 [2020-11-07 02:01:07,878 INFO L226 Difference]: Without dead ends: 127 [2020-11-07 02:01:07,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:01:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-07 02:01:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 85. [2020-11-07 02:01:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-07 02:01:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-11-07 02:01:07,895 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 37 [2020-11-07 02:01:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:07,895 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-11-07 02:01:07,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:01:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-11-07 02:01:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-07 02:01:07,897 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:07,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:07,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:01:07,898 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -50532132, now seen corresponding path program 1 times [2020-11-07 02:01:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:07,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754096862] [2020-11-07 02:01:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:07,902 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:08,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754096862] [2020-11-07 02:01:08,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:08,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:01:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319639772] [2020-11-07 02:01:08,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:01:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:01:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:08,020 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 4 states. [2020-11-07 02:01:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:08,206 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2020-11-07 02:01:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:01:08,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-11-07 02:01:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:08,208 INFO L225 Difference]: With dead ends: 159 [2020-11-07 02:01:08,208 INFO L226 Difference]: Without dead ends: 109 [2020-11-07 02:01:08,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-07 02:01:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-11-07 02:01:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 02:01:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-07 02:01:08,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 37 [2020-11-07 02:01:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:08,222 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-07 02:01:08,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:01:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-07 02:01:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 02:01:08,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:08,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:08,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:01:08,224 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash -869522359, now seen corresponding path program 1 times [2020-11-07 02:01:08,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:08,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097430302] [2020-11-07 02:01:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:08,228 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:08,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097430302] [2020-11-07 02:01:08,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:08,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 02:01:08,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997629746] [2020-11-07 02:01:08,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 02:01:08,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:08,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 02:01:08,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:08,327 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 4 states. [2020-11-07 02:01:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:08,498 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-11-07 02:01:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 02:01:08,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-11-07 02:01:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:08,500 INFO L225 Difference]: With dead ends: 107 [2020-11-07 02:01:08,501 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 02:01:08,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 02:01:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 02:01:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-11-07 02:01:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 02:01:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-11-07 02:01:08,513 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 39 [2020-11-07 02:01:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:08,514 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-11-07 02:01:08,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 02:01:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-11-07 02:01:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 02:01:08,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:08,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:08,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 02:01:08,517 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1052936529, now seen corresponding path program 1 times [2020-11-07 02:01:08,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:08,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481795089] [2020-11-07 02:01:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:08,521 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:08,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481795089] [2020-11-07 02:01:08,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:08,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:01:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674956527] [2020-11-07 02:01:08,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:01:08,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:08,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:01:08,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:01:08,774 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 6 states. [2020-11-07 02:01:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:09,027 INFO L93 Difference]: Finished difference Result 183 states and 196 transitions. [2020-11-07 02:01:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:01:09,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-11-07 02:01:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:09,030 INFO L225 Difference]: With dead ends: 183 [2020-11-07 02:01:09,030 INFO L226 Difference]: Without dead ends: 141 [2020-11-07 02:01:09,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:01:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-11-07 02:01:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2020-11-07 02:01:09,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-07 02:01:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-11-07 02:01:09,043 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 58 [2020-11-07 02:01:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:09,043 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-11-07 02:01:09,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:01:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-11-07 02:01:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 02:01:09,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:09,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:09,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 02:01:09,046 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2014078065, now seen corresponding path program 1 times [2020-11-07 02:01:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:09,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564360180] [2020-11-07 02:01:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:09,049 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:09,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564360180] [2020-11-07 02:01:09,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:09,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 02:01:09,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920927526] [2020-11-07 02:01:09,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 02:01:09,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:09,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 02:01:09,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 02:01:09,170 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 9 states. [2020-11-07 02:01:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:09,583 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-11-07 02:01:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:01:09,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-11-07 02:01:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:09,585 INFO L225 Difference]: With dead ends: 161 [2020-11-07 02:01:09,585 INFO L226 Difference]: Without dead ends: 158 [2020-11-07 02:01:09,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-11-07 02:01:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-07 02:01:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2020-11-07 02:01:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-07 02:01:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2020-11-07 02:01:09,601 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 59 [2020-11-07 02:01:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2020-11-07 02:01:09,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 02:01:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2020-11-07 02:01:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 02:01:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:09,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:09,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 02:01:09,604 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1637029072, now seen corresponding path program 1 times [2020-11-07 02:01:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:09,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099384303] [2020-11-07 02:01:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:09,607 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:09,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099384303] [2020-11-07 02:01:09,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:09,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:01:09,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78067382] [2020-11-07 02:01:09,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:01:09,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:01:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:01:09,801 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 6 states. [2020-11-07 02:01:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:10,115 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2020-11-07 02:01:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:01:10,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-11-07 02:01:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:10,118 INFO L225 Difference]: With dead ends: 172 [2020-11-07 02:01:10,119 INFO L226 Difference]: Without dead ends: 125 [2020-11-07 02:01:10,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:01:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-07 02:01:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-11-07 02:01:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-07 02:01:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-11-07 02:01:10,140 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 59 [2020-11-07 02:01:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:10,141 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-11-07 02:01:10,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:01:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-11-07 02:01:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 02:01:10,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:10,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:10,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 02:01:10,148 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash 798422544, now seen corresponding path program 1 times [2020-11-07 02:01:10,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:10,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203741883] [2020-11-07 02:01:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:10,153 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:10,827 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-11-07 02:01:11,107 WARN L194 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 43 [2020-11-07 02:01:11,341 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-11-07 02:01:11,508 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-11-07 02:01:11,685 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-11-07 02:01:11,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:01:11,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203741883] [2020-11-07 02:01:11,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:11,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 02:01:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632865615] [2020-11-07 02:01:11,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 02:01:11,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 02:01:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-07 02:01:11,936 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 17 states. [2020-11-07 02:01:13,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:13,396 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2020-11-07 02:01:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 02:01:13,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-11-07 02:01:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:13,399 INFO L225 Difference]: With dead ends: 153 [2020-11-07 02:01:13,400 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 02:01:13,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-07 02:01:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 02:01:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2020-11-07 02:01:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-07 02:01:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-11-07 02:01:13,440 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 61 [2020-11-07 02:01:13,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:13,440 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-11-07 02:01:13,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 02:01:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-11-07 02:01:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-07 02:01:13,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:13,441 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:01:13,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 02:01:13,442 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash -553752706, now seen corresponding path program 1 times [2020-11-07 02:01:13,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:13,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691142306] [2020-11-07 02:01:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:13,515 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-07 02:01:13,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:01:13,519 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-11-07 02:01:13,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-07 02:01:13,755 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60