java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:30:39,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:30:39,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:30:39,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:30:39,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:30:39,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:30:39,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:30:39,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:30:39,807 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:30:39,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:30:39,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:30:39,808 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:30:39,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:30:39,809 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:30:39,810 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:30:39,810 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:30:39,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:30:39,810 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:30:39,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:30:39,812 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:30:39,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:30:39,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:30:39,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:30:39,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:30:39,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:30:39,813 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:30:39,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:30:39,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:30:39,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:30:39,814 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:30:39,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:30:39,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:30:39,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:30:39,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:30:39,815 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:30:39,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:30:39,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:30:39,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:30:39,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:30:39,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:30:39,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:30:39,880 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:30:39,880 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:30:39,882 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label48.c [2019-09-09 18:30:39,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd2c22f6/6e41f1c2cf264326bf254068b7a23cf0/FLAG37b6488cc [2019-09-09 18:30:40,511 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:30:40,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label48.c [2019-09-09 18:30:40,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd2c22f6/6e41f1c2cf264326bf254068b7a23cf0/FLAG37b6488cc [2019-09-09 18:30:40,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dd2c22f6/6e41f1c2cf264326bf254068b7a23cf0 [2019-09-09 18:30:40,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:30:40,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:30:40,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:30:40,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:30:40,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:30:40,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:30:40" (1/1) ... [2019-09-09 18:30:40,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32285de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:40, skipping insertion in model container [2019-09-09 18:30:40,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:30:40" (1/1) ... [2019-09-09 18:30:40,806 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:30:40,867 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:30:41,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:30:41,411 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:30:41,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:30:41,625 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:30:41,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41 WrapperNode [2019-09-09 18:30:41,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:30:41,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:30:41,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:30:41,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:30:41,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (1/1) ... [2019-09-09 18:30:41,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:30:41,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:30:41,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:30:41,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:30:41,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (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 [2019-09-09 18:30:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:30:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:30:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:30:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:30:41,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:30:41,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:30:43,502 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:30:43,502 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:30:43,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:43 BoogieIcfgContainer [2019-09-09 18:30:43,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:30:43,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:30:43,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:30:43,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:30:43,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:30:40" (1/3) ... [2019-09-09 18:30:43,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e201915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:43, skipping insertion in model container [2019-09-09 18:30:43,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:30:41" (2/3) ... [2019-09-09 18:30:43,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e201915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:30:43, skipping insertion in model container [2019-09-09 18:30:43,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:30:43" (3/3) ... [2019-09-09 18:30:43,525 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label48.c [2019-09-09 18:30:43,537 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:30:43,547 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:30:43,564 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:30:43,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:30:43,598 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:30:43,598 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:30:43,599 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:30:43,599 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:30:43,599 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:30:43,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:30:43,600 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:30:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:30:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-09 18:30:43,655 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:43,656 INFO L399 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] [2019-09-09 18:30:43,659 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1044438083, now seen corresponding path program 1 times [2019-09-09 18:30:43,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:43,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:43,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:43,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:43,721 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:44,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:44,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:30:44,013 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:44,019 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:30:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:30:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:30:44,037 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:30:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:45,322 INFO L93 Difference]: Finished difference Result 440 states and 719 transitions. [2019-09-09 18:30:45,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:30:45,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-09-09 18:30:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:45,355 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:30:45,356 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:30:45,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:30:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:30:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:30:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:30:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:30:45,439 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 44 [2019-09-09 18:30:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:45,439 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:30:45,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:30:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:30:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 18:30:45,446 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:45,446 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2019-09-09 18:30:45,446 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash -874450379, now seen corresponding path program 1 times [2019-09-09 18:30:45,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:45,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:45,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:45,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:45,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:45,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:45,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:30:45,701 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:45,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:30:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:30:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:30:45,704 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:30:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:46,940 INFO L93 Difference]: Finished difference Result 756 states and 1082 transitions. [2019-09-09 18:30:46,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:30:46,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-09-09 18:30:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:46,947 INFO L225 Difference]: With dead ends: 756 [2019-09-09 18:30:46,947 INFO L226 Difference]: Without dead ends: 756 [2019-09-09 18:30:46,948 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 18:30:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-09-09 18:30:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 560. [2019-09-09 18:30:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-09-09 18:30:46,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 832 transitions. [2019-09-09 18:30:46,991 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 832 transitions. Word has length 125 [2019-09-09 18:30:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:46,991 INFO L475 AbstractCegarLoop]: Abstraction has 560 states and 832 transitions. [2019-09-09 18:30:46,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:30:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 832 transitions. [2019-09-09 18:30:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 18:30:46,997 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:46,997 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2019-09-09 18:30:46,998 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 883126737, now seen corresponding path program 1 times [2019-09-09 18:30:46,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:47,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:47,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:47,000 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:47,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:47,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:47,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:47,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:47,163 INFO L87 Difference]: Start difference. First operand 560 states and 832 transitions. Second operand 4 states. [2019-09-09 18:30:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:48,670 INFO L93 Difference]: Finished difference Result 1480 states and 2059 transitions. [2019-09-09 18:30:48,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:48,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-09-09 18:30:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:48,677 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 18:30:48,678 INFO L226 Difference]: Without dead ends: 1112 [2019-09-09 18:30:48,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:48,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-09-09 18:30:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 560. [2019-09-09 18:30:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-09-09 18:30:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 816 transitions. [2019-09-09 18:30:48,714 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 816 transitions. Word has length 127 [2019-09-09 18:30:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:48,715 INFO L475 AbstractCegarLoop]: Abstraction has 560 states and 816 transitions. [2019-09-09 18:30:48,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 816 transitions. [2019-09-09 18:30:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-09 18:30:48,725 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:48,725 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-09-09 18:30:48,725 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1885753348, now seen corresponding path program 1 times [2019-09-09 18:30:48,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:48,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:48,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:48,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:48,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:48,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:30:48,902 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:30:48,903 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2019-09-09 18:30:48,906 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:30:48,980 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:30:48,981 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:30:54,099 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:30:54,101 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 239 root evaluator evaluations with a maximum evaluation depth of 13. Performed 239 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:30:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:54,105 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:30:59,444 INFO L227 lantSequenceWeakener]: Weakened 206 states. On average, predicates are now at 77.99% of their original sizes. [2019-09-09 18:30:59,445 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:30:59,526 INFO L420 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2019-09-09 18:30:59,527 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:30:59,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:30:59,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:30:59,528 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:59,529 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:30:59,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:30:59,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:30:59,530 INFO L87 Difference]: Start difference. First operand 560 states and 816 transitions. Second operand 10 states. [2019-09-09 18:32:54,224 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:35:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:35:49,117 INFO L93 Difference]: Finished difference Result 746 states and 1011 transitions. [2019-09-09 18:35:49,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 18:35:49,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2019-09-09 18:35:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:35:49,122 INFO L225 Difference]: With dead ends: 746 [2019-09-09 18:35:49,122 INFO L226 Difference]: Without dead ends: 746 [2019-09-09 18:35:49,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:35:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-09-09 18:35:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 742. [2019-09-09 18:35:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2019-09-09 18:35:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1005 transitions. [2019-09-09 18:35:49,141 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1005 transitions. Word has length 225 [2019-09-09 18:35:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:35:49,141 INFO L475 AbstractCegarLoop]: Abstraction has 742 states and 1005 transitions. [2019-09-09 18:35:49,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:35:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1005 transitions. [2019-09-09 18:35:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-09-09 18:35:49,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:35:49,147 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:35:49,148 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:35:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1793013195, now seen corresponding path program 1 times [2019-09-09 18:35:49,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:35:49,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:35:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:49,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:35:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:35:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 197 proven. 164 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:35:49,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:35:49,984 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:35:49,984 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2019-09-09 18:35:49,985 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:35:49,999 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:35:49,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:35:54,985 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:35:54,987 INFO L272 AbstractInterpreter]: Visited 104 different actions 203 times. Merged at 4 different actions 5 times. Never widened. Performed 433 root evaluator evaluations with a maximum evaluation depth of 13. Performed 433 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:35:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:54,988 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:35:57,791 INFO L227 lantSequenceWeakener]: Weakened 306 states. On average, predicates are now at 77.68% of their original sizes. [2019-09-09 18:35:57,791 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:35:57,861 INFO L420 sIntCurrentIteration]: We unified 308 AI predicates to 308 [2019-09-09 18:35:57,861 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:35:57,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:35:57,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:35:57,862 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:35:57,863 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:35:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:35:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:35:57,863 INFO L87 Difference]: Start difference. First operand 742 states and 1005 transitions. Second operand 11 states. [2019-09-09 18:36:32,632 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:36:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:55,300 INFO L93 Difference]: Finished difference Result 958 states and 1232 transitions. [2019-09-09 18:36:55,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:36:55,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 309 [2019-09-09 18:36:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:55,305 INFO L225 Difference]: With dead ends: 958 [2019-09-09 18:36:55,305 INFO L226 Difference]: Without dead ends: 958 [2019-09-09 18:36:55,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:36:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2019-09-09 18:36:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 742. [2019-09-09 18:36:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2019-09-09 18:36:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1005 transitions. [2019-09-09 18:36:55,327 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1005 transitions. Word has length 309 [2019-09-09 18:36:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:55,328 INFO L475 AbstractCegarLoop]: Abstraction has 742 states and 1005 transitions. [2019-09-09 18:36:55,328 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:36:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1005 transitions. [2019-09-09 18:36:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-09-09 18:36:55,334 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:55,334 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:36:55,335 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -732172663, now seen corresponding path program 1 times [2019-09-09 18:36:55,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:55,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:55,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:55,337 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 208 proven. 166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:36:56,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:36:56,207 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:36:56,208 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 336 with the following transitions: [2019-09-09 18:36:56,212 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:36:56,221 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:36:56,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:37:10,827 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:37:10,828 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:37:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:37:10,828 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:37:19,633 INFO L227 lantSequenceWeakener]: Weakened 332 states. On average, predicates are now at 77.65% of their original sizes. [2019-09-09 18:37:19,633 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:37:19,711 INFO L420 sIntCurrentIteration]: We unified 334 AI predicates to 334 [2019-09-09 18:37:19,711 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:37:19,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:37:19,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:37:19,712 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:37:19,713 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:37:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:37:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:37:19,714 INFO L87 Difference]: Start difference. First operand 742 states and 1005 transitions. Second operand 11 states. [2019-09-09 18:38:02,209 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:39:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:50,644 INFO L93 Difference]: Finished difference Result 1110 states and 1395 transitions. [2019-09-09 18:39:50,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:39:50,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 335 [2019-09-09 18:39:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:50,650 INFO L225 Difference]: With dead ends: 1110 [2019-09-09 18:39:50,651 INFO L226 Difference]: Without dead ends: 1110 [2019-09-09 18:39:50,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:39:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2019-09-09 18:39:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1108. [2019-09-09 18:39:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2019-09-09 18:39:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1393 transitions. [2019-09-09 18:39:50,680 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1393 transitions. Word has length 335 [2019-09-09 18:39:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:50,681 INFO L475 AbstractCegarLoop]: Abstraction has 1108 states and 1393 transitions. [2019-09-09 18:39:50,681 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:39:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1393 transitions. [2019-09-09 18:39:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-09-09 18:39:50,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:50,688 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:39:50,689 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1727973875, now seen corresponding path program 1 times [2019-09-09 18:39:50,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:50,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:50,691 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 247 proven. 77 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:39:50,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:39:50,990 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:39:50,990 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 350 with the following transitions: [2019-09-09 18:39:50,990 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:39:50,993 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:39:50,994 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:40:04,668 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:40:46,936 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:40:46,937 INFO L272 AbstractInterpreter]: Visited 119 different actions 695 times. Merged at 6 different actions 31 times. Widened at 1 different actions 1 times. Performed 1556 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1556 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:40:46,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:46,938 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:41:00,765 INFO L227 lantSequenceWeakener]: Weakened 346 states. On average, predicates are now at 77.63% of their original sizes. [2019-09-09 18:41:00,765 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:41:00,848 INFO L420 sIntCurrentIteration]: We unified 348 AI predicates to 348 [2019-09-09 18:41:00,848 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:41:00,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:41:00,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:41:00,849 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:41:00,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:41:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:41:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:41:00,850 INFO L87 Difference]: Start difference. First operand 1108 states and 1393 transitions. Second operand 10 states. [2019-09-09 18:43:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:43:26,571 INFO L93 Difference]: Finished difference Result 1301 states and 1621 transitions. [2019-09-09 18:43:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:43:26,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 349 [2019-09-09 18:43:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:43:26,583 INFO L225 Difference]: With dead ends: 1301 [2019-09-09 18:43:26,583 INFO L226 Difference]: Without dead ends: 1301 [2019-09-09 18:43:26,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:43:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2019-09-09 18:43:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1294. [2019-09-09 18:43:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1294 states. [2019-09-09 18:43:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1614 transitions. [2019-09-09 18:43:26,620 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1614 transitions. Word has length 349 [2019-09-09 18:43:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:43:26,621 INFO L475 AbstractCegarLoop]: Abstraction has 1294 states and 1614 transitions. [2019-09-09 18:43:26,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:43:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1614 transitions. [2019-09-09 18:43:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2019-09-09 18:43:26,629 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:43:26,630 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:43:26,630 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:43:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 625460482, now seen corresponding path program 1 times [2019-09-09 18:43:26,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:43:26,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:26,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:43:26,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:26,633 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:43:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:43:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 238 proven. 179 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-09-09 18:43:26,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:43:26,925 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:43:26,925 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 420 with the following transitions: [2019-09-09 18:43:26,926 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:43:26,928 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:43:26,928 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:43:49,905 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:43:49,906 INFO L272 AbstractInterpreter]: Visited 120 different actions 473 times. Merged at 6 different actions 23 times. Never widened. Performed 934 root evaluator evaluations with a maximum evaluation depth of 13. Performed 934 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2019-09-09 18:43:49,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:49,906 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:43:54,080 INFO L227 lantSequenceWeakener]: Weakened 416 states. On average, predicates are now at 77.59% of their original sizes. [2019-09-09 18:43:54,080 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:43:54,145 INFO L420 sIntCurrentIteration]: We unified 418 AI predicates to 418 [2019-09-09 18:43:54,145 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:43:54,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:43:54,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:43:54,146 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:54,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:43:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:43:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:43:54,147 INFO L87 Difference]: Start difference. First operand 1294 states and 1614 transitions. Second operand 10 states. [2019-09-09 18:44:30,410 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.