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/Problem17_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:34:07,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:34:07,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:34:08,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:34:08,074 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 21:34:08,091 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:34:08,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:34:08,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:34:08,091 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:34:08,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:34:08,092 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:34:08,093 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:34:08,093 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:34:08,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:34:08,093 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:34:08,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:34:08,094 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:34:08,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:34:08,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:34:08,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:34:08,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:34:08,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:34:08,095 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:34:08,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:34:08,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:34:08,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:34:08,096 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:34:08,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:34:08,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:34:08,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:34:08,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:34:08,097 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:34:08,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:34:08,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:34:08,098 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:34:08,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:34:08,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:34:08,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:34:08,144 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:34:08,144 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:34:08,145 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label44.c [2019-09-09 21:34:08,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56169ef0/85ea23ce885a48c69b0ebcaaa5ae6223/FLAG3c320d177 [2019-09-09 21:34:08,892 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:34:08,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label44.c [2019-09-09 21:34:08,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56169ef0/85ea23ce885a48c69b0ebcaaa5ae6223/FLAG3c320d177 [2019-09-09 21:34:09,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b56169ef0/85ea23ce885a48c69b0ebcaaa5ae6223 [2019-09-09 21:34:09,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:34:09,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:34:09,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:34:09,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:34:09,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:34:09,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:34:09" (1/1) ... [2019-09-09 21:34:09,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b2b6b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:09, skipping insertion in model container [2019-09-09 21:34:09,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:34:09" (1/1) ... [2019-09-09 21:34:09,091 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:34:09,197 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:34:10,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:34:10,222 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:34:10,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:34:10,622 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:34:10,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10 WrapperNode [2019-09-09 21:34:10,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:34:10,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:34:10,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:34:10,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:34:10,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:10,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (1/1) ... [2019-09-09 21:34:11,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:34:11,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:34:11,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:34:11,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:34:11,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (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 21:34:11,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:34:11,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:34:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:34:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:34:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:34:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:34:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:34:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:34:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:34:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:34:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:34:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:34:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:34:15,185 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:34:15,185 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:34:15,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:34:15 BoogieIcfgContainer [2019-09-09 21:34:15,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:34:15,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:34:15,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:34:15,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:34:15,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:34:09" (1/3) ... [2019-09-09 21:34:15,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f69d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:34:15, skipping insertion in model container [2019-09-09 21:34:15,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:34:10" (2/3) ... [2019-09-09 21:34:15,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f69d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:34:15, skipping insertion in model container [2019-09-09 21:34:15,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:34:15" (3/3) ... [2019-09-09 21:34:15,197 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label44.c [2019-09-09 21:34:15,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:34:15,218 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:34:15,237 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:34:15,266 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:34:15,266 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:34:15,266 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:34:15,267 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:34:15,267 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:34:15,267 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:34:15,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:34:15,267 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:34:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:34:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-09 21:34:15,310 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:34:15,311 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] [2019-09-09 21:34:15,313 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:34:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash -281563599, now seen corresponding path program 1 times [2019-09-09 21:34:15,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:34:15,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:15,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:34:15,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:15,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:34:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:34:15,713 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 21:34:15,716 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:34:15,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:34:15,716 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:34:15,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:34:15,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:34:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:34:15,741 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:34:21,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:34:21,798 INFO L93 Difference]: Finished difference Result 1517 states and 2104 transitions. [2019-09-09 21:34:21,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:34:21,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-09-09 21:34:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:34:21,835 INFO L225 Difference]: With dead ends: 1517 [2019-09-09 21:34:21,835 INFO L226 Difference]: Without dead ends: 1432 [2019-09-09 21:34:21,839 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 21:34:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2019-09-09 21:34:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 977. [2019-09-09 21:34:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2019-09-09 21:34:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1461 transitions. [2019-09-09 21:34:21,967 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1461 transitions. Word has length 41 [2019-09-09 21:34:21,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:34:21,968 INFO L475 AbstractCegarLoop]: Abstraction has 977 states and 1461 transitions. [2019-09-09 21:34:21,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:34:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1461 transitions. [2019-09-09 21:34:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 21:34:21,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:34:21,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:21,975 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:34:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash 323449881, now seen corresponding path program 1 times [2019-09-09 21:34:21,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:34:21,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:21,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:34:21,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:21,977 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:34:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:34:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:34:22,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:34:22,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:34:22,162 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:34:22,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:34:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:34:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:34:22,165 INFO L87 Difference]: Start difference. First operand 977 states and 1461 transitions. Second operand 4 states. [2019-09-09 21:34:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:34:27,531 INFO L93 Difference]: Finished difference Result 2735 states and 3801 transitions. [2019-09-09 21:34:27,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:34:27,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-09-09 21:34:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:34:27,546 INFO L225 Difference]: With dead ends: 2735 [2019-09-09 21:34:27,546 INFO L226 Difference]: Without dead ends: 2735 [2019-09-09 21:34:27,547 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 21:34:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2019-09-09 21:34:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2730. [2019-09-09 21:34:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2730 states. [2019-09-09 21:34:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3791 transitions. [2019-09-09 21:34:27,643 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3791 transitions. Word has length 115 [2019-09-09 21:34:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:34:27,646 INFO L475 AbstractCegarLoop]: Abstraction has 2730 states and 3791 transitions. [2019-09-09 21:34:27,647 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:34:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3791 transitions. [2019-09-09 21:34:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-09 21:34:27,659 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:34:27,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:27,660 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:34:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1587848282, now seen corresponding path program 1 times [2019-09-09 21:34:27,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:34:27,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:27,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:34:27,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:27,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:34:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:34:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:34:27,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:34:27,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:34:27,834 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:34:27,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:34:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:34:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:34:27,835 INFO L87 Difference]: Start difference. First operand 2730 states and 3791 transitions. Second operand 4 states. [2019-09-09 21:34:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:34:32,659 INFO L93 Difference]: Finished difference Result 7502 states and 10359 transitions. [2019-09-09 21:34:32,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:34:32,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-09-09 21:34:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:34:32,710 INFO L225 Difference]: With dead ends: 7502 [2019-09-09 21:34:32,711 INFO L226 Difference]: Without dead ends: 7502 [2019-09-09 21:34:32,714 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 21:34:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7502 states. [2019-09-09 21:34:32,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7502 to 7069. [2019-09-09 21:34:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7069 states. [2019-09-09 21:34:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 9745 transitions. [2019-09-09 21:34:32,939 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 9745 transitions. Word has length 150 [2019-09-09 21:34:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:34:32,941 INFO L475 AbstractCegarLoop]: Abstraction has 7069 states and 9745 transitions. [2019-09-09 21:34:32,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:34:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 9745 transitions. [2019-09-09 21:34:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-09-09 21:34:32,946 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:34:32,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:34:32,946 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:34:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:32,947 INFO L82 PathProgramCache]: Analyzing trace with hash -766727992, now seen corresponding path program 1 times [2019-09-09 21:34:32,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:34:32,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:32,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:34:32,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:32,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:34:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:34:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:34:33,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:34:33,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:34:33,230 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:34:33,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:34:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:34:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:34:33,232 INFO L87 Difference]: Start difference. First operand 7069 states and 9745 transitions. Second operand 6 states. [2019-09-09 21:34:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:34:37,348 INFO L93 Difference]: Finished difference Result 7218 states and 9063 transitions. [2019-09-09 21:34:37,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:34:37,348 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-09-09 21:34:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:34:37,386 INFO L225 Difference]: With dead ends: 7218 [2019-09-09 21:34:37,387 INFO L226 Difference]: Without dead ends: 7218 [2019-09-09 21:34:37,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 21:34:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-09-09 21:34:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6754. [2019-09-09 21:34:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6754 states. [2019-09-09 21:34:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 8412 transitions. [2019-09-09 21:34:37,557 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 8412 transitions. Word has length 182 [2019-09-09 21:34:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:34:37,558 INFO L475 AbstractCegarLoop]: Abstraction has 6754 states and 8412 transitions. [2019-09-09 21:34:37,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:34:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 8412 transitions. [2019-09-09 21:34:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 21:34:37,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:34:37,563 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, 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] [2019-09-09 21:34:37,563 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:34:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2033679724, now seen corresponding path program 1 times [2019-09-09 21:34:37,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:34:37,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:37,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:34:37,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:34:37,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:34:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:34:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 21:34:37,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:34:37,780 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:34:37,781 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-09-09 21:34:37,783 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [946], [948], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1302], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:34:37,838 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:34:37,838 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:34:41,430 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:34:48,491 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:34:48,494 INFO L272 AbstractInterpreter]: Visited 100 different actions 195 times. Merged at 4 different actions 5 times. Never widened. Performed 425 root evaluator evaluations with a maximum evaluation depth of 15. Performed 425 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:34:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:34:48,498 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:34:52,136 INFO L227 lantSequenceWeakener]: Weakened 204 states. On average, predicates are now at 75.4% of their original sizes. [2019-09-09 21:34:52,136 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:34:52,273 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-09-09 21:34:52,273 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:34:52,274 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:34:52,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 21:34:52,274 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:34:52,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 21:34:52,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 21:34:52,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 21:34:52,275 INFO L87 Difference]: Start difference. First operand 6754 states and 8412 transitions. Second operand 12 states.