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/Problem15_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:41:43,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:41:43,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:41:43,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:41:43,609 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 19:41:43,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:41:43,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:41:43,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:41:43,637 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:41:43,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:41:43,638 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:41:43,638 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:41:43,639 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:41:43,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:41:43,639 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:41:43,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:41:43,642 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:41:43,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:41:43,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:41:43,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:41:43,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:41:43,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:41:43,643 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:41:43,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:41:43,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:41:43,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:41:43,644 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:41:43,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:41:43,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:41:43,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:41:43,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:41:43,645 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:41:43,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:41:43,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:41:43,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:41:43,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:41:43,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:41:43,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:41:43,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:41:43,729 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:41:43,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-09-09 19:41:43,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe01046c/215f61c0ddbd4b4f84d43421a9b70a6e/FLAG8cd180382 [2019-09-09 19:41:44,480 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:41:44,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label55.c [2019-09-09 19:41:44,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe01046c/215f61c0ddbd4b4f84d43421a9b70a6e/FLAG8cd180382 [2019-09-09 19:41:44,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fe01046c/215f61c0ddbd4b4f84d43421a9b70a6e [2019-09-09 19:41:44,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:41:44,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:41:44,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:44,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:41:44,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:41:44,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:44" (1/1) ... [2019-09-09 19:41:44,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f255d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:44, skipping insertion in model container [2019-09-09 19:41:44,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:41:44" (1/1) ... [2019-09-09 19:41:44,702 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:41:44,793 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:41:45,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:45,692 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:41:46,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:41:46,130 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:41:46,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46 WrapperNode [2019-09-09 19:41:46,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:41:46,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:41:46,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:41:46,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:41:46,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (1/1) ... [2019-09-09 19:41:46,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:41:46,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:41:46,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:41:46,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:41:46,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (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 19:41:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:41:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:41:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:41:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:41:46,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:41:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:41:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:41:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:41:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:41:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:41:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:41:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:41:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:41:51,293 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:41:51,298 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:41:51,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:51 BoogieIcfgContainer [2019-09-09 19:41:51,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:41:51,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:41:51,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:41:51,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:41:51,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:41:44" (1/3) ... [2019-09-09 19:41:51,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a39e838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:51, skipping insertion in model container [2019-09-09 19:41:51,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:41:46" (2/3) ... [2019-09-09 19:41:51,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a39e838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:41:51, skipping insertion in model container [2019-09-09 19:41:51,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:41:51" (3/3) ... [2019-09-09 19:41:51,314 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label55.c [2019-09-09 19:41:51,326 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:41:51,337 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:41:51,355 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:41:51,387 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:41:51,387 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:41:51,387 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:41:51,387 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:41:51,388 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:41:51,388 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:41:51,388 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:41:51,388 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:41:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:41:51,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-09 19:41:51,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:51,450 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] [2019-09-09 19:41:51,452 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 567183525, now seen corresponding path program 1 times [2019-09-09 19:41:51,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:51,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:51,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:51,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:51,539 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:52,070 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 19:41:52,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:52,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:41:52,074 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:52,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:41:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:41:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:41:52,111 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:41:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:41:56,939 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-09-09 19:41:56,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:41:56,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-09-09 19:41:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:41:56,970 INFO L225 Difference]: With dead ends: 1066 [2019-09-09 19:41:56,970 INFO L226 Difference]: Without dead ends: 993 [2019-09-09 19:41:56,972 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 19:41:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-09-09 19:41:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-09-09 19:41:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:41:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-09-09 19:41:57,069 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 63 [2019-09-09 19:41:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:41:57,070 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-09-09 19:41:57,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:41:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-09-09 19:41:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 19:41:57,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:41:57,077 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, 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 19:41:57,078 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:41:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:41:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 550015554, now seen corresponding path program 1 times [2019-09-09 19:41:57,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:41:57,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:57,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:41:57,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:41:57,080 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:41:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:41:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:41:57,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:41:57,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:41:57,262 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:41:57,264 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:41:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:41:57,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:41:57,265 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-09-09 19:42:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:42:01,332 INFO L93 Difference]: Finished difference Result 1926 states and 2567 transitions. [2019-09-09 19:42:01,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:42:01,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-09-09 19:42:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:42:01,344 INFO L225 Difference]: With dead ends: 1926 [2019-09-09 19:42:01,344 INFO L226 Difference]: Without dead ends: 1926 [2019-09-09 19:42:01,345 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 19:42:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2019-09-09 19:42:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1924. [2019-09-09 19:42:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1924 states. [2019-09-09 19:42:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 2563 transitions. [2019-09-09 19:42:01,410 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 2563 transitions. Word has length 132 [2019-09-09 19:42:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:42:01,411 INFO L475 AbstractCegarLoop]: Abstraction has 1924 states and 2563 transitions. [2019-09-09 19:42:01,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:42:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 2563 transitions. [2019-09-09 19:42:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-09 19:42:01,418 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:42:01,418 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, 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] [2019-09-09 19:42:01,419 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:42:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:42:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2042933374, now seen corresponding path program 1 times [2019-09-09 19:42:01,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:42:01,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:01,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:42:01,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:42:01,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:42:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:42:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 115 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:42:01,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:42:01,804 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:42:01,805 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2019-09-09 19:42:01,809 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [613], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:42:01,860 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:42:01,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:42:04,872 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:42:05,904 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:42:05,906 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 452 root evaluator evaluations with a maximum evaluation depth of 13. Performed 452 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 19:42:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:42:05,911 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:42:07,179 INFO L227 lantSequenceWeakener]: Weakened 234 states. On average, predicates are now at 78.14% of their original sizes. [2019-09-09 19:42:07,179 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:42:07,270 INFO L420 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2019-09-09 19:42:07,270 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:42:07,271 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:42:07,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:42:07,272 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:42:07,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:42:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:42:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:42:07,273 INFO L87 Difference]: Start difference. First operand 1924 states and 2563 transitions. Second operand 11 states. [2019-09-09 19:46:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:46:59,067 INFO L93 Difference]: Finished difference Result 2576 states and 3236 transitions. [2019-09-09 19:46:59,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 19:46:59,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2019-09-09 19:46:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:46:59,079 INFO L225 Difference]: With dead ends: 2576 [2019-09-09 19:46:59,079 INFO L226 Difference]: Without dead ends: 2576 [2019-09-09 19:46:59,080 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 227 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 19:46:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2019-09-09 19:46:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2231. [2019-09-09 19:46:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2231 states. [2019-09-09 19:46:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2878 transitions. [2019-09-09 19:46:59,135 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2878 transitions. Word has length 237 [2019-09-09 19:46:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:46:59,135 INFO L475 AbstractCegarLoop]: Abstraction has 2231 states and 2878 transitions. [2019-09-09 19:46:59,136 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 19:46:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2878 transitions. [2019-09-09 19:46:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-09-09 19:46:59,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:46:59,142 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:59,142 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:46:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:46:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash -596361719, now seen corresponding path program 1 times [2019-09-09 19:46:59,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:46:59,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:46:59,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:46:59,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:46:59,145 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:46:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:46:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 115 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:46:59,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:46:59,471 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:46:59,472 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 323 with the following transitions: [2019-09-09 19:46:59,472 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [613], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1115], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:46:59,480 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:46:59,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:47:06,408 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:47:09,617 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:47:09,618 INFO L272 AbstractInterpreter]: Visited 188 different actions 371 times. Merged at 4 different actions 5 times. Never widened. Performed 695 root evaluator evaluations with a maximum evaluation depth of 14. Performed 695 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:47:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:47:09,618 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:47:12,753 INFO L227 lantSequenceWeakener]: Weakened 319 states. On average, predicates are now at 77.91% of their original sizes. [2019-09-09 19:47:12,753 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:47:12,873 INFO L420 sIntCurrentIteration]: We unified 321 AI predicates to 321 [2019-09-09 19:47:12,873 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:47:12,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:47:12,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:47:12,873 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:47:12,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:47:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:47:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:47:12,875 INFO L87 Difference]: Start difference. First operand 2231 states and 2878 transitions. Second operand 12 states. [2019-09-09 19:51:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:51:57,960 INFO L93 Difference]: Finished difference Result 2883 states and 3552 transitions. [2019-09-09 19:51:57,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 19:51:57,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 322 [2019-09-09 19:51:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:51:57,975 INFO L225 Difference]: With dead ends: 2883 [2019-09-09 19:51:57,975 INFO L226 Difference]: Without dead ends: 2883 [2019-09-09 19:51:57,976 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-09-09 19:51:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2019-09-09 19:51:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2847. [2019-09-09 19:51:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2847 states. [2019-09-09 19:51:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 3512 transitions. [2019-09-09 19:51:58,038 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 3512 transitions. Word has length 322 [2019-09-09 19:51:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:51:58,039 INFO L475 AbstractCegarLoop]: Abstraction has 2847 states and 3512 transitions. [2019-09-09 19:51:58,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-09 19:51:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 3512 transitions. [2019-09-09 19:51:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2019-09-09 19:51:58,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:51:58,047 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:51:58,048 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:51:58,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:51:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1349052335, now seen corresponding path program 1 times [2019-09-09 19:51:58,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:51:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:58,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:51:58,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:51:58,050 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:51:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:51:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-09 19:51:58,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:51:58,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:51:58,402 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:51:58,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:51:58,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:51:58,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:51:58,404 INFO L87 Difference]: Start difference. First operand 2847 states and 3512 transitions. Second operand 5 states. [2019-09-09 19:52:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:52:03,011 INFO L93 Difference]: Finished difference Result 4449 states and 5387 transitions. [2019-09-09 19:52:03,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 19:52:03,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 379 [2019-09-09 19:52:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:52:03,035 INFO L225 Difference]: With dead ends: 4449 [2019-09-09 19:52:03,035 INFO L226 Difference]: Without dead ends: 4449 [2019-09-09 19:52:03,036 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:52:03,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2019-09-09 19:52:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 4429. [2019-09-09 19:52:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4429 states. [2019-09-09 19:52:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 5346 transitions. [2019-09-09 19:52:03,145 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 5346 transitions. Word has length 379 [2019-09-09 19:52:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:52:03,146 INFO L475 AbstractCegarLoop]: Abstraction has 4429 states and 5346 transitions. [2019-09-09 19:52:03,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:52:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 5346 transitions. [2019-09-09 19:52:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2019-09-09 19:52:03,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:52:03,160 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:52:03,160 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:52:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:52:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1143506365, now seen corresponding path program 1 times [2019-09-09 19:52:03,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:52:03,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:03,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:52:03,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:03,162 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:52:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:52:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 247 proven. 84 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-09 19:52:03,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:52:03,846 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:52:03,847 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 497 with the following transitions: [2019-09-09 19:52:03,848 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [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], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [613], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:52:03,860 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:52:03,861 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:52:16,324 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:52:27,891 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:52:27,892 INFO L272 AbstractInterpreter]: Visited 283 different actions 561 times. Merged at 4 different actions 5 times. Never widened. Performed 1196 root evaluator evaluations with a maximum evaluation depth of 14. Performed 1196 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:52:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:52:27,892 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:52:37,490 INFO L227 lantSequenceWeakener]: Weakened 493 states. On average, predicates are now at 77.7% of their original sizes. [2019-09-09 19:52:37,490 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:52:37,752 INFO L420 sIntCurrentIteration]: We unified 495 AI predicates to 495 [2019-09-09 19:52:37,752 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:52:37,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:52:37,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [8] total 24 [2019-09-09 19:52:37,753 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:52:37,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-09 19:52:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-09 19:52:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-09-09 19:52:37,754 INFO L87 Difference]: Start difference. First operand 4429 states and 5346 transitions. Second operand 18 states.