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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:54,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:54,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:54,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:54,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:54,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:54,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:54,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:54,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:54,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:54,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:54,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:54,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:54,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:54,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:54,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:54,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:54,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:54,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:54,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:54,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:54,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:54,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:54,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:54,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:54,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:54,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:54,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:54,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:06:54,283 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:54,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:54,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:54,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:54,286 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:54,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:54,286 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:54,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:54,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:54,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:54,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:54,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:54,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:54,287 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:54,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:54,288 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:54,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:54,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:54,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:54,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:54,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:54,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:54,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:54,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:54,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:54,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:54,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:54,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:54,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:06:54,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:54,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:54,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:54,596 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:54,596 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:54,597 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-15 00:06:54,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcac5e5ab/65f4a11603f44bfa921fafdb40a15310/FLAG47515e976 [2019-10-15 00:06:55,274 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:55,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-10-15 00:06:55,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcac5e5ab/65f4a11603f44bfa921fafdb40a15310/FLAG47515e976 [2019-10-15 00:06:55,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcac5e5ab/65f4a11603f44bfa921fafdb40a15310 [2019-10-15 00:06:55,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:55,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:55,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:55,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:55,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:55,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:55" (1/1) ... [2019-10-15 00:06:55,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ddb9b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:55, skipping insertion in model container [2019-10-15 00:06:55,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:55" (1/1) ... [2019-10-15 00:06:55,571 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:55,633 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:56,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:56,232 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:56,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:56,530 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:56,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56 WrapperNode [2019-10-15 00:06:56,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:56,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:56,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:56,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:56,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (1/1) ... [2019-10-15 00:06:56,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:56,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:56,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:56,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:56,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (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 [2019-10-15 00:06:56,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:56,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:56,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:56,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:56,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:56,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:56,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:56,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:58,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:58,484 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:58,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:58 BoogieIcfgContainer [2019-10-15 00:06:58,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:58,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:58,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:58,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:58,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:55" (1/3) ... [2019-10-15 00:06:58,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:58, skipping insertion in model container [2019-10-15 00:06:58,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:56" (2/3) ... [2019-10-15 00:06:58,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:58, skipping insertion in model container [2019-10-15 00:06:58,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:58" (3/3) ... [2019-10-15 00:06:58,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label57.c [2019-10-15 00:06:58,505 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:58,514 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:58,526 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:58,562 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:58,563 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:58,563 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:58,563 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:58,563 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:58,563 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:58,564 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:58,564 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 00:06:58,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:58,617 INFO L380 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] [2019-10-15 00:06:58,619 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1500027043, now seen corresponding path program 1 times [2019-10-15 00:06:58,639 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:58,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079084886] [2019-10-15 00:06:58,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:58,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:58,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:59,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079084886] [2019-10-15 00:06:59,059 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:59,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:59,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328156853] [2019-10-15 00:06:59,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:59,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:59,096 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:07:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:00,382 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:07:00,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:07:00,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-10-15 00:07:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:00,402 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:07:00,403 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:07:00,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:07:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:07:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:07:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:07:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:07:00,502 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 36 [2019-10-15 00:07:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:00,504 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:07:00,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:07:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:07:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 00:07:00,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:00,514 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:00,514 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1488834266, now seen corresponding path program 1 times [2019-10-15 00:07:00,516 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:00,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521059890] [2019-10-15 00:07:00,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:00,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:00,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:00,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521059890] [2019-10-15 00:07:00,792 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:00,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:07:00,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949399124] [2019-10-15 00:07:00,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:07:00,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:07:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:07:00,796 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:07:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:02,086 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-15 00:07:02,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:07:02,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-15 00:07:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:02,101 INFO L225 Difference]: With dead ends: 936 [2019-10-15 00:07:02,102 INFO L226 Difference]: Without dead ends: 570 [2019-10-15 00:07:02,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:07:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-15 00:07:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-15 00:07:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-15 00:07:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-15 00:07:02,185 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 122 [2019-10-15 00:07:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:02,186 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-15 00:07:02,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:07:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-15 00:07:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 00:07:02,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:02,193 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:02,193 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash -753448615, now seen corresponding path program 1 times [2019-10-15 00:07:02,194 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:02,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610169712] [2019-10-15 00:07:02,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:02,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:02,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:02,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610169712] [2019-10-15 00:07:02,364 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:02,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:02,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923755270] [2019-10-15 00:07:02,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:02,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:02,366 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-15 00:07:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:03,950 INFO L93 Difference]: Finished difference Result 2220 states and 3292 transitions. [2019-10-15 00:07:03,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:03,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 00:07:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:03,961 INFO L225 Difference]: With dead ends: 2220 [2019-10-15 00:07:03,961 INFO L226 Difference]: Without dead ends: 1664 [2019-10-15 00:07:03,964 INFO L600 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 [2019-10-15 00:07:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-15 00:07:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-15 00:07:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-15 00:07:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-10-15 00:07:04,031 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 131 [2019-10-15 00:07:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:04,032 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-10-15 00:07:04,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-10-15 00:07:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-15 00:07:04,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:04,040 INFO L380 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, 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] [2019-10-15 00:07:04,041 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1175360854, now seen corresponding path program 1 times [2019-10-15 00:07:04,041 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:04,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555409103] [2019-10-15 00:07:04,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:04,042 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:04,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:04,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555409103] [2019-10-15 00:07:04,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134892564] [2019-10-15 00:07:04,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:04,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:07:04,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:04,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 00:07:04,907 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:05,105 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2019-10-15 00:07:05,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 58 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:05,620 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:05,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:07:05,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254639831] [2019-10-15 00:07:05,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:05,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:05,622 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 5 states. [2019-10-15 00:07:07,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:07,019 INFO L93 Difference]: Finished difference Result 3726 states and 5163 transitions. [2019-10-15 00:07:07,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:07,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-15 00:07:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:07,035 INFO L225 Difference]: With dead ends: 3726 [2019-10-15 00:07:07,035 INFO L226 Difference]: Without dead ends: 2068 [2019-10-15 00:07:07,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 513 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:07:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-15 00:07:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1690. [2019-10-15 00:07:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2019-10-15 00:07:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2313 transitions. [2019-10-15 00:07:07,118 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2313 transitions. Word has length 259 [2019-10-15 00:07:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:07,120 INFO L462 AbstractCegarLoop]: Abstraction has 1690 states and 2313 transitions. [2019-10-15 00:07:07,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2313 transitions. [2019-10-15 00:07:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-15 00:07:07,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:07,130 INFO L380 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:07,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:07,337 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:07,338 INFO L82 PathProgramCache]: Analyzing trace with hash -518867421, now seen corresponding path program 1 times [2019-10-15 00:07:07,338 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:07,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360295117] [2019-10-15 00:07:07,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:07,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:07,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 173 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:08,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360295117] [2019-10-15 00:07:08,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128893722] [2019-10-15 00:07:08,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:08,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:07:08,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:08,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:07:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 283 proven. 53 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 00:07:08,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:08,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:07:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 95 proven. 267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:09,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1152033041] [2019-10-15 00:07:09,294 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 344 [2019-10-15 00:07:09,347 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:09,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:21,906 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:21,909 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:07:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:21,914 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:07:28,013 INFO L227 lantSequenceWeakener]: Weakened 340 states. On average, predicates are now at 77.53% of their original sizes. [2019-10-15 00:07:28,013 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:07:28,102 INFO L553 sIntCurrentIteration]: We unified 342 AI predicates to 342 [2019-10-15 00:07:28,103 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:07:28,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:07:28,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-15 00:07:28,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985625977] [2019-10-15 00:07:28,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:07:28,109 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:28,109 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:07:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:07:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:28,112 INFO L87 Difference]: Start difference. First operand 1690 states and 2313 transitions. Second operand 11 states.