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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:39:31,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:39:31,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:39:31,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:39:32,023 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 18:39:32,048 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:39:32,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:39:32,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:39:32,050 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:39:32,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:39:32,051 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:39:32,051 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:39:32,051 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:39:32,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:39:32,051 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:39:32,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:39:32,054 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:39:32,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:39:32,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:39:32,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:39:32,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:39:32,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:39:32,055 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:39:32,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:39:32,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:39:32,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:39:32,056 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:39:32,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:39:32,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:39:32,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:39:32,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:39:32,057 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:39:32,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:39:32,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:39:32,058 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:39:32,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:39:32,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:39:32,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:39:32,112 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:39:32,113 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:39:32,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-09-09 18:39:32,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddbfba1a/55abcb47551040778d86bc14c2399efc/FLAG26b93478a [2019-09-09 18:39:32,796 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:39:32,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-09-09 18:39:32,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddbfba1a/55abcb47551040778d86bc14c2399efc/FLAG26b93478a [2019-09-09 18:39:33,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddbfba1a/55abcb47551040778d86bc14c2399efc [2019-09-09 18:39:33,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:39:33,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:39:33,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:39:33,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:39:33,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:39:33,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30acff7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33, skipping insertion in model container [2019-09-09 18:39:33,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:39:33,092 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:39:33,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:39:33,685 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:39:33,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:39:33,826 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:39:33,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33 WrapperNode [2019-09-09 18:39:33,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:39:33,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:39:33,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:39:33,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:39:33,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (1/1) ... [2019-09-09 18:39:33,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:39:33,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:39:33,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:39:33,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:39:33,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (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 18:39:34,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:39:34,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:39:34,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:39:34,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:39:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:39:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:39:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:39:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:39:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:39:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:39:34,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:39:35,522 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:39:35,523 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:39:35,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:39:35 BoogieIcfgContainer [2019-09-09 18:39:35,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:39:35,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:39:35,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:39:35,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:39:35,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:39:33" (1/3) ... [2019-09-09 18:39:35,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fba1942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:39:35, skipping insertion in model container [2019-09-09 18:39:35,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:39:33" (2/3) ... [2019-09-09 18:39:35,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fba1942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:39:35, skipping insertion in model container [2019-09-09 18:39:35,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:39:35" (3/3) ... [2019-09-09 18:39:35,541 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2019-09-09 18:39:35,552 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:39:35,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:39:35,578 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:39:35,613 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:39:35,614 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:39:35,615 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:39:35,615 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:39:35,615 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:39:35,615 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:39:35,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:39:35,616 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:39:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:39:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-09 18:39:35,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:35,652 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:39:35,654 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash 856083907, now seen corresponding path program 1 times [2019-09-09 18:39:35,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:35,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:35,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:35,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:35,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:35,849 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 18:39:35,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:39:35,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:39:35,852 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:39:35,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:39:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:39:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:39:35,876 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:39:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:37,260 INFO L93 Difference]: Finished difference Result 456 states and 608 transitions. [2019-09-09 18:39:37,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:39:37,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-09 18:39:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:37,279 INFO L225 Difference]: With dead ends: 456 [2019-09-09 18:39:37,279 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:39:37,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 18:39:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:39:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:39:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:39:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-09-09 18:39:37,365 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 12 [2019-09-09 18:39:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:37,365 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-09-09 18:39:37,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:39:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-09-09 18:39:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-09 18:39:37,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:37,373 INFO L399 BasicCegarLoop]: trace histogram [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, 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 18:39:37,374 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1019209391, now seen corresponding path program 1 times [2019-09-09 18:39:37,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:37,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:37,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:37,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:37,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:39:37,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:39:37,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:39:37,619 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:39:37,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:39:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:39:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:39:37,622 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 3 states. [2019-09-09 18:39:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:38,661 INFO L93 Difference]: Finished difference Result 736 states and 968 transitions. [2019-09-09 18:39:38,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:39:38,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-09-09 18:39:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:38,667 INFO L225 Difference]: With dead ends: 736 [2019-09-09 18:39:38,668 INFO L226 Difference]: Without dead ends: 736 [2019-09-09 18:39:38,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 18:39:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-09-09 18:39:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2019-09-09 18:39:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-09-09 18:39:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 968 transitions. [2019-09-09 18:39:38,713 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 968 transitions. Word has length 95 [2019-09-09 18:39:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:38,714 INFO L475 AbstractCegarLoop]: Abstraction has 736 states and 968 transitions. [2019-09-09 18:39:38,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:39:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 968 transitions. [2019-09-09 18:39:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 18:39:38,717 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:38,717 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:38,717 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:38,718 INFO L82 PathProgramCache]: Analyzing trace with hash -788431111, now seen corresponding path program 1 times [2019-09-09 18:39:38,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:38,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:38,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:38,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:38,722 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:39:38,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:39:38,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:39:38,875 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:39:38,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:39:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:39:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:39:38,877 INFO L87 Difference]: Start difference. First operand 736 states and 968 transitions. Second operand 3 states. [2019-09-09 18:39:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:39,759 INFO L93 Difference]: Finished difference Result 1100 states and 1450 transitions. [2019-09-09 18:39:39,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:39:39,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-09-09 18:39:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:39,767 INFO L225 Difference]: With dead ends: 1100 [2019-09-09 18:39:39,767 INFO L226 Difference]: Without dead ends: 1100 [2019-09-09 18:39:39,768 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 18:39:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-09-09 18:39:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-09-09 18:39:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-09-09 18:39:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1450 transitions. [2019-09-09 18:39:39,809 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1450 transitions. Word has length 107 [2019-09-09 18:39:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:39,809 INFO L475 AbstractCegarLoop]: Abstraction has 1100 states and 1450 transitions. [2019-09-09 18:39:39,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:39:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1450 transitions. [2019-09-09 18:39:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 18:39:39,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:39,814 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:39,814 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:39,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash 481187826, now seen corresponding path program 1 times [2019-09-09 18:39:39,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:39,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:39,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:39,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:39,816 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:39:39,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:39:39,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:39:39,904 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:39:39,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:39:39,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:39:39,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:39:39,905 INFO L87 Difference]: Start difference. First operand 1100 states and 1450 transitions. Second operand 3 states. [2019-09-09 18:39:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:40,747 INFO L93 Difference]: Finished difference Result 1646 states and 2108 transitions. [2019-09-09 18:39:40,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:39:40,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-09-09 18:39:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:40,761 INFO L225 Difference]: With dead ends: 1646 [2019-09-09 18:39:40,761 INFO L226 Difference]: Without dead ends: 1646 [2019-09-09 18:39:40,761 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 18:39:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-09-09 18:39:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-09-09 18:39:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:39:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2108 transitions. [2019-09-09 18:39:40,819 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2108 transitions. Word has length 124 [2019-09-09 18:39:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:40,820 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2108 transitions. [2019-09-09 18:39:40,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:39:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2108 transitions. [2019-09-09 18:39:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 18:39:40,824 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:40,825 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:40,825 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1056936878, now seen corresponding path program 1 times [2019-09-09 18:39:40,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:40,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:40,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:40,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:40,827 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:39:40,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:39:40,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:39:40,943 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:39:40,944 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:39:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:39:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:39:40,945 INFO L87 Difference]: Start difference. First operand 1646 states and 2108 transitions. Second operand 3 states. [2019-09-09 18:39:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:39:41,808 INFO L93 Difference]: Finished difference Result 2192 states and 2772 transitions. [2019-09-09 18:39:41,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:39:41,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-09-09 18:39:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:39:41,820 INFO L225 Difference]: With dead ends: 2192 [2019-09-09 18:39:41,820 INFO L226 Difference]: Without dead ends: 2192 [2019-09-09 18:39:41,821 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 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 18:39:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2019-09-09 18:39:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2192. [2019-09-09 18:39:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2192 states. [2019-09-09 18:39:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2772 transitions. [2019-09-09 18:39:41,875 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2772 transitions. Word has length 142 [2019-09-09 18:39:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:39:41,876 INFO L475 AbstractCegarLoop]: Abstraction has 2192 states and 2772 transitions. [2019-09-09 18:39:41,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:39:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2772 transitions. [2019-09-09 18:39:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-09-09 18:39:41,881 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:39:41,882 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 18:39:41,882 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:39:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1291514030, now seen corresponding path program 1 times [2019-09-09 18:39:41,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:39:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:41,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:39:41,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:39:41,884 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:39:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:39:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:39:42,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:39:42,112 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:39:42,113 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 256 with the following transitions: [2019-09-09 18:39:42,118 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [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], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:39:42,164 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:39:42,165 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:39:59,911 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:39:59,913 INFO L272 AbstractInterpreter]: Visited 145 different actions 145 times. Never merged. Never widened. Performed 329 root evaluator evaluations with a maximum evaluation depth of 14. Performed 329 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:39:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:39:59,919 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:40:15,516 INFO L227 lantSequenceWeakener]: Weakened 236 states. On average, predicates are now at 77.28% of their original sizes. [2019-09-09 18:40:15,517 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:40:15,626 INFO L420 sIntCurrentIteration]: We unified 254 AI predicates to 254 [2019-09-09 18:40:15,626 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:40:15,627 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:40:15,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:40:15,627 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:15,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:40:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:40:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:40:15,629 INFO L87 Difference]: Start difference. First operand 2192 states and 2772 transitions. Second operand 11 states. [2019-09-09 18:41:55,563 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:42:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:42:54,762 INFO L93 Difference]: Finished difference Result 2196 states and 2766 transitions. [2019-09-09 18:42:54,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:42:54,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 255 [2019-09-09 18:42:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:42:54,775 INFO L225 Difference]: With dead ends: 2196 [2019-09-09 18:42:54,775 INFO L226 Difference]: Without dead ends: 2196 [2019-09-09 18:42:54,777 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 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 18:42:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2019-09-09 18:42:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2192. [2019-09-09 18:42:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2192 states. [2019-09-09 18:42:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2759 transitions. [2019-09-09 18:42:54,849 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2759 transitions. Word has length 255 [2019-09-09 18:42:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:42:54,850 INFO L475 AbstractCegarLoop]: Abstraction has 2192 states and 2759 transitions. [2019-09-09 18:42:54,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:42:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2759 transitions. [2019-09-09 18:42:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-09-09 18:42:54,864 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:42:54,865 INFO L399 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:42:54,865 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:42:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:54,866 INFO L82 PathProgramCache]: Analyzing trace with hash -215880318, now seen corresponding path program 1 times [2019-09-09 18:42:54,866 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:42:54,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:42:54,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:42:54,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:42:54,868 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:42:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:42:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:42:55,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:42:55,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:42:55,680 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 283 with the following transitions: [2019-09-09 18:42:55,682 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [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], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:42:55,696 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:42:55,696 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:43:04,032 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:43:04,034 INFO L272 AbstractInterpreter]: Visited 112 different actions 219 times. Merged at 4 different actions 5 times. Never widened. Performed 458 root evaluator evaluations with a maximum evaluation depth of 13. Performed 458 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 18:43:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:04,034 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:43:07,195 INFO L227 lantSequenceWeakener]: Weakened 279 states. On average, predicates are now at 77.19% of their original sizes. [2019-09-09 18:43:07,196 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:43:07,280 INFO L420 sIntCurrentIteration]: We unified 281 AI predicates to 281 [2019-09-09 18:43:07,280 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:43:07,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:43:07,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:43:07,281 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:07,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:43:07,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:43:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:43:07,283 INFO L87 Difference]: Start difference. First operand 2192 states and 2759 transitions. Second operand 11 states. [2019-09-09 18:43:41,728 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:44:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:44:10,029 INFO L93 Difference]: Finished difference Result 2408 states and 2985 transitions. [2019-09-09 18:44:10,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:44:10,030 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 282 [2019-09-09 18:44:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:44:10,040 INFO L225 Difference]: With dead ends: 2408 [2019-09-09 18:44:10,040 INFO L226 Difference]: Without dead ends: 2408 [2019-09-09 18:44:10,041 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 272 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 18:44:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2019-09-09 18:44:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2192. [2019-09-09 18:44:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2192 states. [2019-09-09 18:44:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2758 transitions. [2019-09-09 18:44:10,091 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2758 transitions. Word has length 282 [2019-09-09 18:44:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:44:10,091 INFO L475 AbstractCegarLoop]: Abstraction has 2192 states and 2758 transitions. [2019-09-09 18:44:10,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:44:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2758 transitions. [2019-09-09 18:44:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2019-09-09 18:44:10,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:10,098 INFO L399 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:44:10,099 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1498516910, now seen corresponding path program 1 times [2019-09-09 18:44:10,099 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:10,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:10,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:10,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:10,101 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 72 proven. 159 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-09 18:44:10,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:44:10,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:44:10,579 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 309 with the following transitions: [2019-09-09 18:44:10,580 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [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], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:44:10,595 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:44:10,596 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:44:27,572 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:44:27,572 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 18:44:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:27,573 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:44:37,632 INFO L227 lantSequenceWeakener]: Weakened 305 states. On average, predicates are now at 77.2% of their original sizes. [2019-09-09 18:44:37,633 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:44:37,716 INFO L420 sIntCurrentIteration]: We unified 307 AI predicates to 307 [2019-09-09 18:44:37,717 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:44:37,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:44:37,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 18:44:37,717 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:44:37,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:44:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:44:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:44:37,718 INFO L87 Difference]: Start difference. First operand 2192 states and 2758 transitions. Second operand 11 states. [2019-09-09 18:45:21,310 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:47:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:47:03,425 INFO L93 Difference]: Finished difference Result 2560 states and 3141 transitions. [2019-09-09 18:47:03,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:47:03,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 308 [2019-09-09 18:47:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:47:03,435 INFO L225 Difference]: With dead ends: 2560 [2019-09-09 18:47:03,436 INFO L226 Difference]: Without dead ends: 2560 [2019-09-09 18:47:03,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 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 18:47:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2019-09-09 18:47:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2558. [2019-09-09 18:47:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2558 states. [2019-09-09 18:47:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 3139 transitions. [2019-09-09 18:47:03,486 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 3139 transitions. Word has length 308 [2019-09-09 18:47:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:47:03,487 INFO L475 AbstractCegarLoop]: Abstraction has 2558 states and 3139 transitions. [2019-09-09 18:47:03,487 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:47:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 3139 transitions. [2019-09-09 18:47:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2019-09-09 18:47:03,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:47:03,496 INFO L399 BasicCegarLoop]: trace histogram [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, 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, 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 18:47:03,496 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:47:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:47:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 12908757, now seen corresponding path program 1 times [2019-09-09 18:47:03,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:47:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:47:03,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:47:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:47:03,498 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:47:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:47:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 110 proven. 184 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-09-09 18:47:03,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:47:03,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:47:03,807 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 393 with the following transitions: [2019-09-09 18:47:03,808 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [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], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:47:03,814 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:47:03,814 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:47:24,775 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:47:24,775 INFO L272 AbstractInterpreter]: Visited 120 different actions 472 times. Merged at 6 different actions 22 times. Never widened. Performed 849 root evaluator evaluations with a maximum evaluation depth of 13. Performed 849 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 18:47:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:47:24,776 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:47:29,497 INFO L227 lantSequenceWeakener]: Weakened 389 states. On average, predicates are now at 77.22% of their original sizes. [2019-09-09 18:47:29,498 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:47:29,558 INFO L420 sIntCurrentIteration]: We unified 391 AI predicates to 391 [2019-09-09 18:47:29,559 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:47:29,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:47:29,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:47:29,559 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:47:29,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:47:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:47:29,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:47:29,561 INFO L87 Difference]: Start difference. First operand 2558 states and 3139 transitions. Second operand 10 states. [2019-09-09 18:48:07,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:49:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:49:10,302 INFO L93 Difference]: Finished difference Result 2933 states and 3535 transitions. [2019-09-09 18:49:10,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:49:10,303 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 392 [2019-09-09 18:49:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:49:10,314 INFO L225 Difference]: With dead ends: 2933 [2019-09-09 18:49:10,314 INFO L226 Difference]: Without dead ends: 2933 [2019-09-09 18:49:10,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 383 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 18:49:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2019-09-09 18:49:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2746. [2019-09-09 18:49:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2746 states. [2019-09-09 18:49:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 3340 transitions. [2019-09-09 18:49:10,372 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 3340 transitions. Word has length 392 [2019-09-09 18:49:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:49:10,373 INFO L475 AbstractCegarLoop]: Abstraction has 2746 states and 3340 transitions. [2019-09-09 18:49:10,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:49:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 3340 transitions. [2019-09-09 18:49:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-09-09 18:49:10,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:49:10,381 INFO L399 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:49:10,382 INFO L418 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:49:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:49:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1041015615, now seen corresponding path program 1 times [2019-09-09 18:49:10,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:49:10,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:49:10,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:49:10,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:49:10,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:49:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:49:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 164 proven. 245 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-09-09 18:49:10,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:49:10,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:49:10,837 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 405 with the following transitions: [2019-09-09 18:49:10,837 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [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], [498], [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], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:49:10,840 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:49:10,840 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:49:26,068 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:49:54,852 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:49:54,852 INFO L272 AbstractInterpreter]: Visited 120 different actions 584 times. Merged at 6 different actions 24 times. Never widened. Performed 1151 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1151 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 18:49:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:49:54,853 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:50:03,864 INFO L227 lantSequenceWeakener]: Weakened 401 states. On average, predicates are now at 77.23% of their original sizes. [2019-09-09 18:50:03,865 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:50:03,928 INFO L420 sIntCurrentIteration]: We unified 403 AI predicates to 403 [2019-09-09 18:50:03,929 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:50:03,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:50:03,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:50:03,929 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:50:03,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:50:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:50:03,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:50:03,931 INFO L87 Difference]: Start difference. First operand 2746 states and 3340 transitions. Second operand 10 states.