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_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:32:11,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:32:11,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:32:11,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:32:12,003 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 18:32:12,027 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:32:12,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:32:12,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:32:12,028 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:32:12,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:32:12,029 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:32:12,029 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:32:12,029 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:32:12,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:32:12,030 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:32:12,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:32:12,032 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:32:12,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:32:12,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:32:12,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:32:12,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:32:12,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:32:12,034 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:32:12,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:32:12,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:32:12,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:32:12,035 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:32:12,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:32:12,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:32:12,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:32:12,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:32:12,036 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:32:12,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:32:12,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:32:12,037 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:32:12,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:32:12,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:32:12,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:32:12,111 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:32:12,112 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:32:12,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label49.c [2019-09-09 18:32:12,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213a232ad/b0706420dac74b3e959b6c440daaf8fe/FLAG70a25267c [2019-09-09 18:32:12,717 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:32:12,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label49.c [2019-09-09 18:32:12,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213a232ad/b0706420dac74b3e959b6c440daaf8fe/FLAG70a25267c [2019-09-09 18:32:12,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213a232ad/b0706420dac74b3e959b6c440daaf8fe [2019-09-09 18:32:12,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:32:12,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:32:12,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:32:12,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:32:13,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:32:13,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:32:12" (1/1) ... [2019-09-09 18:32:13,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fdff94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:13, skipping insertion in model container [2019-09-09 18:32:13,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:32:12" (1/1) ... [2019-09-09 18:32:13,013 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:32:13,085 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:32:13,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:32:13,790 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:32:14,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:32:14,025 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:32:14,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14 WrapperNode [2019-09-09 18:32:14,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:32:14,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:32:14,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:32:14,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:32:14,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (1/1) ... [2019-09-09 18:32:14,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:32:14,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:32:14,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:32:14,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:32:14,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (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 18:32:14,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:32:14,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:32:14,220 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:32:14,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:32:14,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:32:15,617 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:32:15,617 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:32:15,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:32:15 BoogieIcfgContainer [2019-09-09 18:32:15,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:32:15,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:32:15,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:32:15,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:32:15,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:32:12" (1/3) ... [2019-09-09 18:32:15,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ff2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:32:15, skipping insertion in model container [2019-09-09 18:32:15,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:32:14" (2/3) ... [2019-09-09 18:32:15,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ff2ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:32:15, skipping insertion in model container [2019-09-09 18:32:15,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:32:15" (3/3) ... [2019-09-09 18:32:15,628 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label49.c [2019-09-09 18:32:15,638 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:32:15,647 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:32:15,664 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:32:15,692 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:32:15,693 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:32:15,694 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:32:15,694 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:32:15,694 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:32:15,694 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:32:15,694 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:32:15,694 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:32:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:32:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-09 18:32:15,737 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:32:15,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:32:15,741 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:32:15,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:32:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash -989018502, now seen corresponding path program 1 times [2019-09-09 18:32:15,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:32:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:32:15,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:15,799 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:32:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:32:16,118 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 18:32:16,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:32:16,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:32:16,121 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:32:16,130 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:32:16,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:32:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:32:16,150 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:32:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:32:18,059 INFO L93 Difference]: Finished difference Result 642 states and 895 transitions. [2019-09-09 18:32:18,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:32:18,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-09-09 18:32:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:32:18,083 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:32:18,083 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:32:18,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 18:32:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:32:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-09-09 18:32:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:32:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-09-09 18:32:18,184 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 65 [2019-09-09 18:32:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:32:18,185 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-09-09 18:32:18,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:32:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-09-09 18:32:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-09 18:32:18,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:32:18,197 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:32:18,197 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:32:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:32:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2034317014, now seen corresponding path program 1 times [2019-09-09 18:32:18,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:32:18,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:18,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:32:18,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:18,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:32:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:32:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:32:18,507 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:32:18,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:32:18,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:32:18,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:32:18,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:32:18,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:32:18,510 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-09-09 18:32:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:32:20,110 INFO L93 Difference]: Finished difference Result 1646 states and 2256 transitions. [2019-09-09 18:32:20,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:32:20,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-09-09 18:32:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:32:20,122 INFO L225 Difference]: With dead ends: 1646 [2019-09-09 18:32:20,123 INFO L226 Difference]: Without dead ends: 1646 [2019-09-09 18:32:20,124 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 18:32:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-09-09 18:32:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1464. [2019-09-09 18:32:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-09-09 18:32:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1994 transitions. [2019-09-09 18:32:20,185 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1994 transitions. Word has length 177 [2019-09-09 18:32:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:32:20,187 INFO L475 AbstractCegarLoop]: Abstraction has 1464 states and 1994 transitions. [2019-09-09 18:32:20,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:32:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1994 transitions. [2019-09-09 18:32:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-09 18:32:20,199 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:32:20,199 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:20,200 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:32:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:32:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1543638766, now seen corresponding path program 1 times [2019-09-09 18:32:20,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:32:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:20,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:32:20,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:32:20,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:32:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:32:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:32:20,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:32:20,517 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:32:20,518 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2019-09-09 18:32:20,521 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:32:20,569 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:32:20,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:32:30,988 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:32:30,990 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Performed 271 root evaluator evaluations with a maximum evaluation depth of 13. Performed 271 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:32:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:32:30,995 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:32:39,206 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 78.28% of their original sizes. [2019-09-09 18:32:39,206 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:32:39,295 INFO L420 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-09-09 18:32:39,295 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:32:39,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:32:39,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:32:39,297 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:32:39,298 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:32:39,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:32:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:32:39,299 INFO L87 Difference]: Start difference. First operand 1464 states and 1994 transitions. Second operand 11 states. [2019-09-09 18:34:13,929 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:35:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:35:39,206 INFO L93 Difference]: Finished difference Result 1650 states and 2189 transitions. [2019-09-09 18:35:39,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:35:39,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 259 [2019-09-09 18:35:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:35:39,220 INFO L225 Difference]: With dead ends: 1650 [2019-09-09 18:35:39,220 INFO L226 Difference]: Without dead ends: 1650 [2019-09-09 18:35:39,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:35:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2019-09-09 18:35:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1646. [2019-09-09 18:35:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:35:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2183 transitions. [2019-09-09 18:35:39,285 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2183 transitions. Word has length 259 [2019-09-09 18:35:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:35:39,287 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2183 transitions. [2019-09-09 18:35:39,287 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:35:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2183 transitions. [2019-09-09 18:35:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-09-09 18:35:39,299 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:35:39,299 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, 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, 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] [2019-09-09 18:35:39,300 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:35:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 717046090, now seen corresponding path program 1 times [2019-09-09 18:35:39,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:35:39,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:39,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:35:39,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:35:39,304 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:35:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:35:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 259 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:35:40,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:35:40,067 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:35:40,068 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 344 with the following transitions: [2019-09-09 18:35:40,068 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:35:40,074 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:35:40,074 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:35:51,729 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:35:51,730 INFO L272 AbstractInterpreter]: Visited 120 different actions 235 times. Merged at 4 different actions 5 times. Never widened. Performed 481 root evaluator evaluations with a maximum evaluation depth of 13. Performed 481 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 18:35:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:35:51,731 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:35:55,857 INFO L227 lantSequenceWeakener]: Weakened 340 states. On average, predicates are now at 77.92% of their original sizes. [2019-09-09 18:35:55,857 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:35:55,929 INFO L420 sIntCurrentIteration]: We unified 342 AI predicates to 342 [2019-09-09 18:35:55,930 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:35:55,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:35:55,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:35:55,930 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:35:55,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:35:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:35:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:35:55,932 INFO L87 Difference]: Start difference. First operand 1646 states and 2183 transitions. Second operand 11 states. [2019-09-09 18:36:29,065 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:36:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:36:57,073 INFO L93 Difference]: Finished difference Result 1862 states and 2410 transitions. [2019-09-09 18:36:57,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:36:57,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 343 [2019-09-09 18:36:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:36:57,083 INFO L225 Difference]: With dead ends: 1862 [2019-09-09 18:36:57,083 INFO L226 Difference]: Without dead ends: 1862 [2019-09-09 18:36:57,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 333 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 18:36:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2019-09-09 18:36:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1646. [2019-09-09 18:36:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:36:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2183 transitions. [2019-09-09 18:36:57,130 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2183 transitions. Word has length 343 [2019-09-09 18:36:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:36:57,131 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2183 transitions. [2019-09-09 18:36:57,131 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:36:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2183 transitions. [2019-09-09 18:36:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-09-09 18:36:57,138 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:36:57,138 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, 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, 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] [2019-09-09 18:36:57,139 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:36:57,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:36:57,139 INFO L82 PathProgramCache]: Analyzing trace with hash 562327518, now seen corresponding path program 1 times [2019-09-09 18:36:57,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:36:57,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:57,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:36:57,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:36:57,141 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:36:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:36:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 231 proven. 166 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-09 18:36:57,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:36:57,648 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:36:57,649 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 370 with the following transitions: [2019-09-09 18:36:57,651 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:36:57,666 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:36:57,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:37:12,379 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:37:12,379 INFO L272 AbstractInterpreter]: Visited 120 different actions 235 times. Merged at 4 different actions 5 times. Never widened. Performed 561 root evaluator evaluations with a maximum evaluation depth of 13. Performed 561 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 18:37:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:37:12,380 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:37:24,173 INFO L227 lantSequenceWeakener]: Weakened 366 states. On average, predicates are now at 77.87% of their original sizes. [2019-09-09 18:37:24,173 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:37:24,262 INFO L420 sIntCurrentIteration]: We unified 368 AI predicates to 368 [2019-09-09 18:37:24,263 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:37:24,263 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:37:24,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 18:37:24,263 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:37:24,264 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:37:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:37:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:37:24,265 INFO L87 Difference]: Start difference. First operand 1646 states and 2183 transitions. Second operand 11 states. [2019-09-09 18:38:06,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:39:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:44,798 INFO L93 Difference]: Finished difference Result 2014 states and 2573 transitions. [2019-09-09 18:39:44,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:39:44,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 369 [2019-09-09 18:39:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:44,814 INFO L225 Difference]: With dead ends: 2014 [2019-09-09 18:39:44,814 INFO L226 Difference]: Without dead ends: 2014 [2019-09-09 18:39:44,815 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 359 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 18:39:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2019-09-09 18:39:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2012. [2019-09-09 18:39:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2012 states. [2019-09-09 18:39:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2571 transitions. [2019-09-09 18:39:44,861 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2571 transitions. Word has length 369 [2019-09-09 18:39:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:44,861 INFO L475 AbstractCegarLoop]: Abstraction has 2012 states and 2571 transitions. [2019-09-09 18:39:44,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:39:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2571 transitions. [2019-09-09 18:39:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-09-09 18:39:44,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:44,871 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, 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, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:39:44,871 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash -100424438, now seen corresponding path program 1 times [2019-09-09 18:39:44,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:44,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:44,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:44,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:44,873 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 310 proven. 124 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:39:45,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:39:45,445 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:39:45,446 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 396 with the following transitions: [2019-09-09 18:39:45,446 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [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], [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], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:39:45,449 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:39:45,450 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:39:59,584 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:40:27,313 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:40:27,313 INFO L272 AbstractInterpreter]: Visited 120 different actions 584 times. Merged at 6 different actions 24 times. Never widened. Performed 1149 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1149 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:40:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:27,314 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:40:37,022 INFO L227 lantSequenceWeakener]: Weakened 392 states. On average, predicates are now at 77.83% of their original sizes. [2019-09-09 18:40:37,022 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:40:37,090 INFO L420 sIntCurrentIteration]: We unified 394 AI predicates to 394 [2019-09-09 18:40:37,091 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:40:37,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:40:37,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:40:37,091 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:37,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:40:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:40:37,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:40:37,093 INFO L87 Difference]: Start difference. First operand 2012 states and 2571 transitions. Second operand 10 states. [2019-09-09 18:42:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:42:33,263 INFO L93 Difference]: Finished difference Result 2203 states and 2799 transitions. [2019-09-09 18:42:33,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:42:33,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 395 [2019-09-09 18:42:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:42:33,277 INFO L225 Difference]: With dead ends: 2203 [2019-09-09 18:42:33,277 INFO L226 Difference]: Without dead ends: 2203 [2019-09-09 18:42:33,278 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 386 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 18:42:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2019-09-09 18:42:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2198. [2019-09-09 18:42:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2198 states. [2019-09-09 18:42:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2794 transitions. [2019-09-09 18:42:33,332 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2794 transitions. Word has length 395 [2019-09-09 18:42:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:42:33,332 INFO L475 AbstractCegarLoop]: Abstraction has 2198 states and 2794 transitions. [2019-09-09 18:42:33,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:42:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2794 transitions. [2019-09-09 18:42:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-09-09 18:42:33,344 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:42:33,345 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:42:33,345 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:42:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -568173034, now seen corresponding path program 1 times [2019-09-09 18:42:33,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:42:33,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:42:33,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:42:33,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:42:33,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:42:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:42:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 322 proven. 191 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-09-09 18:42:33,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:42:33,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:42:33,613 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 454 with the following transitions: [2019-09-09 18:42:33,613 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:42:33,616 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:42:33,616 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:42:53,735 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:42:53,735 INFO L272 AbstractInterpreter]: Visited 121 different actions 475 times. Merged at 6 different actions 21 times. Never widened. Performed 848 root evaluator evaluations with a maximum evaluation depth of 13. Performed 848 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:42:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:53,735 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:42:59,144 INFO L227 lantSequenceWeakener]: Weakened 450 states. On average, predicates are now at 77.77% of their original sizes. [2019-09-09 18:42:59,145 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:42:59,236 INFO L420 sIntCurrentIteration]: We unified 452 AI predicates to 452 [2019-09-09 18:42:59,237 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:42:59,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:42:59,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:42:59,237 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:42:59,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:42:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:42:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:42:59,239 INFO L87 Difference]: Start difference. First operand 2198 states and 2794 transitions. Second operand 10 states. [2019-09-09 18:43:35,330 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:44:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:44:36,056 INFO L93 Difference]: Finished difference Result 2388 states and 2997 transitions. [2019-09-09 18:44:36,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:44:36,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 453 [2019-09-09 18:44:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:44:36,075 INFO L225 Difference]: With dead ends: 2388 [2019-09-09 18:44:36,075 INFO L226 Difference]: Without dead ends: 2388 [2019-09-09 18:44:36,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 18:44:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2019-09-09 18:44:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2384. [2019-09-09 18:44:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2384 states. [2019-09-09 18:44:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 2993 transitions. [2019-09-09 18:44:36,140 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 2993 transitions. Word has length 453 [2019-09-09 18:44:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:44:36,141 INFO L475 AbstractCegarLoop]: Abstraction has 2384 states and 2993 transitions. [2019-09-09 18:44:36,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:44:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 2993 transitions. [2019-09-09 18:44:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2019-09-09 18:44:36,156 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:36,157 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:44:36,157 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1844358318, now seen corresponding path program 1 times [2019-09-09 18:44:36,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:36,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:36,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:36,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:36,160 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 539 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-09-09 18:44:36,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:44:36,597 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:44:36,597 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 480 with the following transitions: [2019-09-09 18:44:36,598 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], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [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], [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], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:44:36,601 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:44:36,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:44:55,892 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:45:17,576 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:45:17,578 INFO L272 AbstractInterpreter]: Visited 121 different actions 725 times. Merged at 7 different actions 49 times. Widened at 1 different actions 1 times. Performed 1294 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1294 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 11 fixpoints after 3 different actions. Largest state had 24 variables. [2019-09-09 18:45:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:45:17,578 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:45:25,391 INFO L227 lantSequenceWeakener]: Weakened 476 states. On average, predicates are now at 77.74% of their original sizes. [2019-09-09 18:45:25,392 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:45:25,459 INFO L420 sIntCurrentIteration]: We unified 478 AI predicates to 478 [2019-09-09 18:45:25,460 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:45:25,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:45:25,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:45:25,460 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:45:25,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:45:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:45:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:45:25,462 INFO L87 Difference]: Start difference. First operand 2384 states and 2993 transitions. Second operand 10 states.